Manual bien tan delta MH300

Delta High Performance Compact Drive MH300 Series User Manual w w w d e l t a w w c o m Delta High Performance Compact Drive MH300 Series User Manual Industrial Automation Headquarters Delta Electronics, Inc Taoyuan Technology Center 18 Xinglong Road, Taoyuan District, Taoyuan City 33068, Taiwan (R.O.C.) TEL: 886-3-362-6301 / FAX: 886-3-371-6301 Asia Delta Electronics (Jiangsu) Ltd Wujiang Plant 1688 Jiangxing East Road, Wujiang Economic Development Zone Wujiang City, Jiang Su Province, P.R.C 215200 TEL: 86-512-6340-3008 / FAX: 86-769-6340-7290 Delta Greentech (China) Co., Ltd 238 Min-Xia Road, Pudong District, ShangHai, P.R.C 201209 TEL: 86-21-58635678 / FAX: 86-21-58630003 Delta Electronics (Japan), Inc Tokyo Office 2-1-14 Minato-ku Shibadaimon, Tokyo 105-0012, Japan TEL: 81-3-5733-1111 / FAX: 81-3-5733-1211 Delta Electronics (Korea), Inc 1511, Byucksan Digital Valley 6-cha, Gasan-dong, Geumcheon-gu, Seoul, Korea, 153-704 TEL: 82-2-515-5303 / FAX: 82-2-515-5302 Delta Electronics Int’l (S) Pte Ltd Kaki Bukit Ave 1, #05-05, Singapore 417939 TEL: 65-6747-5155 / FAX: 65-6744-9228 Delta Electronics (India) Pvt Ltd Plot No 43 Sector 35, HSIIDC Gurgaon, PIN 122001, Haryana, India TEL : 91-124-4874900 / FAX : 91-124-4874945 Americas Delta Products Corporation (USA) Raleigh Office P.O Box 12173,5101 Davis Drive, Research Triangle Park, NC 27709, U.S.A TEL: 1-919-767-3800 / FAX: 1-919-767-8080 Delta Greentech (Brasil) S.A Sao Paulo Office Rua Itapeva, 26 - 3° andar Edificio Itapeva One-Bela Vista 01332-000-São Paulo-SP-Brazil TEL: 55 11 3568-3855 / FAX: 55 11 3568-3865 Europe Delta Electronics (Netherlands) B.V Eindhoven Office De Witbogt 20, 5652 AG Eindhoven, The Netherlands TEL: +31 (0)40-8003800 / FAX: +31 (0)40-8003898 *We reserve the right to change the information in this user manual without prior notice 201703 PLEASE READ PRIOR TO INSTALLATION FOR SAFETY  AC input power must be disconnected before any wiring to the AC motor drive is made  Even if the power has been turned off, a charge may still remain in the DC-link DANGER capacitors with hazardous voltages before the POWER LED is OFF Please not touch the internal circuit and components  There are highly sensitive MOS components on the printed circuit boards These components are especially sensitive to static electricity Please not touch these components or the circuit boards before taking anti-static measures  Never reassemble internal components or wiring  Ground the AC motor drive using the ground terminal The grounding method must comply with the laws of the country where the AC motor drive is to be installed  DO NOT install the AC motor drive in a place subjected to high temperature, direct sunlight and inflammables  Never connect the AC motor drive output terminals U/T1, V/T2 and W/T3 directly to the CAU TION AC mains circuit power supply  The rated voltage of the AC motor drive must be  115V for 110V models,  240V for 230V models, and  480V for 460V models  Only qualified persons are allowed to install, wire and maintain the AC motor drives  Even if the 3-phase AC motor is stop, a charge may still remain in the main circuit terminals of the AC motor drive with hazardous voltages  If the AC motor drive is stored in no charge condition for more than months, the ambient temperature should not be higher than 30°C Storage longer than one year is not recommended, it could result in the degradation of the electrolytic capacitors  Pay attention to the following when transporting and installing this package (including wooden crate, wood stave and carton box) If you need to sterilize, deform the wooden crate or carton box, please not use steamed smoking sterilization or you will damage the VFD Please use other ways to sterilize or deform You may use high temperature to sterilize or deform Leave the packaging materials in an environment of over 56°C for 30 minutes  Type of electrical supply system (3WYE) to which the drive shall be connected NOTE    For a detailed explanation of the product specification, the cover or the safety shields will be disassembled, as described in graphic mode As for the product in operation, please install the top cover and wiring correctly according to the provisions Refer to the manual operation to ensure safety The figures in this instruction are only for reference, they may be slightly different from the one you have, but it will not affect your customer rights The content of this manual may be revised without prior notice Please consult our distributors or download the latest version at http://www.deltaww.com/services/DownloadCenter2.aspx?secID=8&pid=2&tid=0&CID=06&itemID=060101&typeID =1&downloadID=&title=&dataType=&check=0&hl=en-US I Table of Contents CHAPTER INTRODUCTION 1-1 1-1 1-2 1-3 1-4 Nameplate Information 1-2 Model Name .1-3 Serial Number 1-3 RFI Jumper 1-4 CHAPTER DIMENSION 2-1 Frame Frame Frame Frame Frame Frame Digital A…………………………………………………… ……………………………………2-1 B…………………………………………………………… ……………………………2-2 C…………………………………………………………… ……………………………2-3 D………………………………………………………… ………………………………2-4 E………………………………………………………… ………………………………2-5 F………………………………………………………… ………………………………2-6 Keypad………… ……………………………………………………………………….2-7 CHAPTER INSTALLATION 3-1 CHAPTER WIRING 4-1 4-1 Wiring 4-3 4-2 System Wiring Diagram .4-6 CHAPTER MAIN CIRCUIT TERMINALS 5-1 5-1 Main Circuit Diagram 5-4 5-2 Main Circuit Terminals 5-5 Frame A……………… ……………………………… ……………………………………5-6 Frame B……… ……………………………………………… ……………………………5-7 Frame C……… ……………………………………………… ……………………………5-8 Frame D……… ……………………………………………….……………………………5-9 Frame E………… … ………………………………………….…………………………5-10 Frame F………….…….……………………………………….……………………………5-11 CHPATER CONTROL TERMINALS 6-1 CHAPTER OPTIONAL ACCESSORIES 7-1 7-1 7-2 7-3 7-4 7-5 All Brake Resistors and Brake Units Used in AC Motor Drives 7-2 Non-fuse Circuit Breaker 7-5 Fuse Specification Chart 7-7 AC/DC Reactor 7-9 Zero Phase Reactor .7-25 II 7-6 EMC Filter .7-28 7-7 EMC Shield Plate 7-33 7-8 Capacitive Filter .7-36 7-9 Conduit Box… 7-38 7-10 Fan Kit 7-46 7-11 Keypad Panel Mounting …… 7-47 7-12 DIN-Rail Mounting 7-48 7-13 Mounting Adapter Plate…………………………………….……………………………7-50 CHAPTER OPTION CARDS 8-1 8-1 8-2 8-3 8-4 8-5 8-6 8-7 8-8 Option Card Installation .8-2 EMM-D33A I/O Extension Card 8-8 EMM-A22A I/O Extension Card 8-9 EMM-R3AA Relay Extension Card 8-10 EMM-R2CA Relay Extension Card 8-11 CMM-MOD01 Modbus/TCP Option Card 8-12 CMM-PD01 PROFIBUS Option Card 8-15 CMM-DN01 DeviceNet Option Card .8-17 8-9 CMM-EIP01 Modbus TCP/EtherNet IP Option Card .8-20 8-10 EMM-BPS01 Back-up Power Supply Card 8-23 8-11 EMM-PG01L PG Card 8-24 8-12 EMM-PG01O PG Card 8-27 8-13 EMM-PG01R PG Card 8-30 8-14 CANopen Communication Cable/Digital Keypad RJ45 Extension Cable 8-33 CHAPTER SPECIFICATION 9-1 9-1 9-2 9-3 9-4 9-5 115V Series…………………………… .9-2 230V Series……………………………… 9-3 460V Series……………………………… 9-5 Environment for Operation, Storage and Transportation…………………… .9-8 Derating of Ambient Temperature and Altitude…………………… 9-9 CHAPTER 10 DIGITAL KEYPAD 10-1 CHAPTER 11 SUMMARPY OF PARAMETERS SETTINGS 11-1 CHAPTER 12 DESCRIPTION OF PARAMETER SETTINGS 12-00-1 12-1 Description of Parameter Settings…………………… ……………………………12-00-1 12-2 Adjustment & Application…………………………………………………………… 12.2-1 CHAPTER 13 WARNING CODES 13-1 CHAPTER 14 ERROR CODES 14-1 III CHAPTER 15 CANOPEN OVERVIEW 15-1 CHAPTER 16 PLC FUNCTION APPLICATIONS 16-1 CHAPTER 17 SAFE TORQUE OFF FUNCTION……………………… .…………………….17-1 17-1 17-2 17-3 17-4 17-5 17-6 17-7 17-8 Basic Function Description………… .17-2 Safe Torque Off Terminal Function Description 17-3 Wiring Diagram .17-4 Failure Rate of the Drive Safety Function .17-5 Reset the Parameter Settings… 17-5 Timing Diagram Description 17-6 Error Code and Troubleshooting Instructions…………………………………………17-8 Test and Fault Confirmation……………………………………………………….… 17-10 Application Control Board: V 1.0 IV Chapter IntroductionMH300 Chapter Introduction 1-1 Nameplate Information 1-2 Model Name 1-3 Serial Number 1-4 RFI Jumper 1-1 Chapter Introduction MH300 After receiving the AC motor drive, please check for the following: Please inspect the unit after unpacking to ensure it was not damaged during shipment Make sure that the part number printed on the package corresponds with the part number indicated on the nameplate Make sure that the mains voltage is within the range as indicated on the nameplate Please install the AC motor drive according to this manual Before applying the power, please make sure that all devices, including mains power, motor, control board and digital keypad, are connected correctly When wiring the AC motor drive, please make sure that the wiring of input terminals “R/L1, S/L2, T/L3” and output terminals”U/T1, V/T2, W/T3” are correct to prevent damage to the drive When power is applied, select the language and set parameters via the digital keypad (KPMH-LC01) When executing a trial run, please begin with a low speed and then gradually increase the speed until the desired speed is reached 1-1 Nameplate Information 1-2 Chapter IntroductionMH300 1-2 Model Name 1-3 Serial Number 1-3 Chapter 16 PLC Function ApplicationsMH300 Speed mode control commands: FREQ(P) S1 Target speed S2 S3 The first acceleration time setting The first deceleration time setting Example of speed mode control: Before performing speed control, if the FOC (magnetic field orientation) control method is used, setting of electromechanical parameters must first be completed Setting D1060 = will shift the drive to the speed mode (default) Use the FREQ command to control frequency, acceleration time, and deceleration time Set M1040 = 1, the drive will now be excited, but the frequency will be Set M1025 = 1, the drive frequency command will now jump to the frequency designated by FREQ, and acceleration/deceleration will be controlled on the basis of the acceleration time and deceleration time specified by FREQ M1052 can be used to lock the current operating frequency M1044 can be used to temporarily pause operation, and the deceleration method will comply with deceleration settings M1042 can be used to perform quick stop, and deceleration will be as quick as possible without giving rise to an error (There may still be a jump error if the load is too large.) Control user rights: M1040(Servo ON) > M1042(Quick Stop) >M1044(Halt) >M1052(LOCK) 16-103 Chapter 16 PLC Function ApplicationsMH300 Torque control: Register table for torque mode: Control special M Special M M1040 Servo On Description of Function Status special M Special M M1056 Servo On Ready M1063 Torque attained Description of Function Attributes RW Attributes RO RO Control special D Special D Description of Function D1060 Operating mode setting (torque mode is 2) Attributes Status special D Special D Description of Function D1050 Actual operating mode (speed mode is 0) D1053 Actual torque Attributes RW RO RO Torque mode control commands: S1 TORQ(P) S2 Target torque (with numbers) Frequency restrictions Example of torque mode control: The setting of electromechanical parameters involved in torque control must be completed before implementing torque control Set D1060 = to change the converted to the torque mode Use the TORQ command to implement torque control and speed limits Set M1040 = 1; the driver will now be excited, and immediately jump to the target torque or speed limit D1053 can be used to find out the current torque M1002 MOV K2 ON only for 1scan a M1000 TMR Normally open contact D1060 Set control mode (0:V) K30 T0 Power on delay T0 Power on delay 13 19 Ready X1 TORQ K100 Set Torque X1 K1000 TORQ K-200 K1000 Set Torque 25 M0 X4 Ready Power on 28 END 9999 16-104 Chapter 16 PLC Function ApplicationsMH300 16-9 Count Function Using Pulse Input 16-9-1 High-speed count function The MH300's MI7 supports one-way pulse counting, or use MI6+MI7 to support AB-phase two-way pulse counting, and the maximum speed is 33K The starting method is very simple, and only requires setting M1038 to begin counting The 32 bit count value is stored on D1054 and D1055 in non-numerical form M1039 can reset the count value to Take MI7 one-way pulse input as an example:   Current count value of MI8(H word) ※ When the PLC program defines MI7 for use as a high-speed counter, and also for use in PLC procedures, it must be written to M1038 or M1039, and the original MI8 functions will be disabled 16-9-2 Frequency calculation function Apart from high-speed counting, the MH300's MI7 (one-way pulse counting) or MI6+MI7 (AB-phase two-way pulse counting) can also convert a received pulse to frequency The following figure shows that there is no conflict between frequency conversion and count calculations, which can be performed simultaneously PLC speed calculation formula D1057 Speed D1058 Interval between calculations D1059 Decimal places Assuming that there are input pulses each second, (see figure below) we set D1058=1000ms=1.0 sec as the calculation interval This enables five pulses to be sent to the drive each second   Assuming that each pulses correspond to 1Hz, we set D1057=5 Assuming that we wish to display numbers to two decimal places, we set D1059=2, which is also 1.00Hz The numerical value displayed at D1056 is 100 For simplicity, the D1059 conversion formula can be expressed as in the following table: D1056 = (Pulses per second / D1057) * (1000 / D1058) * (10^D1059) 16-105 Chapter 16 PLC Function ApplicationsMH300 [ This page intentionally left blank ] 16-106 Chapter 17 Safe Torque Off FunctionMH300 Chapter 17 Safe Torque Off Function 17-1 Basic Function Description 17-2 Safe Torque Off Terminal Function Description 17-3 Wiring Diagram 17-4 Failure Rate of the Drive Safety Function 17-5 Reset the Parameter Settings 17-6 Timing Diagram Description 17-7 Error Code and Troubleshooting Instructions 17-8 Test and Fault Confirmation 17-1 Chapter 17 Safe Torque Off FunctionMH300 17-1 Basic Function Description MH300 series provides a Safe Torque Off (STO, Safe Torque Off) function Through the dual-channel S1 and S2 signal input to turn off IGBT switching, thereby preventing the generation of motor torque in order to achieve safe stop Please refer to Figure for the circuit diagram of Safe Torque Off function MH300 Safe Torque Off function meets the following international specifications: ISO 13849-1: 2015 Category PL d IEC 61508 SIL2 EN 62061 SIL CL EN 60204-1 Category AC power +24VDC STO Functional Block Of Subsystem R4 R3 A S1 +3.3V C DCM D R1 Emergency Stop button MCU B S2 Safety PLC +3.3V GU GV GW GX GY GZ Line Driver E SU1 SV1 SW1 SX SY SZ Line Driver IGBT Power Section SU SV SW Gate Driver Motor DCM R2 FDBK MO2 Reset IC +3.3V +3.3V Channel A (safety) MCM G +3.3V Channel B (safety) Diagnostic path RC F RA Figure 1: The circuit diagram of Safe Torque Off function 17-2 Non-safety path Chapter 17 Safe Torque Off FunctionMH300 17-2 Safe Torque Off Terminal Function Description As mentioned earlier STO (Safe torque off) related terminal functions are described in Table below Terminals Terminal Function +24V When the STO function is not used, the STO function can be disabled by shorting S1 and S2 with + 24 V S1 Signal input of STO function channel Specifications Output voltage range: +24 V ± 10 % Output voltage capacity: 100 mA S1~DCM / S2~DCM Rated input voltage: +24 VDC ± 10 %; Max input voltage: +30 VDC ± 10 % Rated input current: 6.67 mA ± 10 % S2 DCM Signal input of STO function channel Reference ground of S1 and S2 signal STO activation mode Input voltage level: VDC < S1~DCM and S2~DCM < VDC STO response time: ≤ 20 ms (time required for S1 / S2 operate till the drive stop outputting) STO cut-off mode Input voltage level: 11 VDC < S1~DCM and S2~DCM < 30 VDC Table 1: Terminal function description Action logic and keypad display after S1 / S2 signal input are described in Table below Signal Status S1~DCM ON ON OFF OFF S2~DCM ON OFF ON OFF Drive output Ready to output STL2 mode (Torque output off) STL1 mode (Torque output off) STO mode (Torque output off) Error displayed on keypad No error displayed STL2 STL1 STO Table 2: Description of action logic and keypad display  STO means channel and operate simultaneously and enter Safe Torque Off  STL1 means channel operates  STL2 means channel operates  STL3 means there is error detected in the internal circuit of channel or channel  S1~DCM / S2~DCM ON: means S1~DCM / S2~DCM inputs a power supply > 11 VDC  S1~DCM / S2~DCM OFF: means S1~DCM / S2~DCM inputs a power supply < VDC 17-3 Chapter 17 Safe Torque Off FunctionMH300 17-3 Wiring Diagram 17-3-1 Internal circuit diagram of safe control loop is shown in Figure2 17-3-2 Terminals of the safe control loop + 24V-S1-S2 are short-circuited together with jumper wire at the factory, as shown in Figure 17-3-3 The safe control loop wiring diagram is as follows: Remove the jumper wire of +24V-S1-S2 The wiring as shown in Figure below Normally, the switch ESTOP contact must be closed, thereby the drive can output without error displayed In STO mode, the switch ESTOP is turned on The drive stops outputting and keypad displays STO Figure MO2 (Factory setting: 66) MCM *1 Figure NOTE *1 is factory jumper wire of +24V-S1-S2 To use the Safety function, please remove this jumper wire Conversely, if the Safety function is disabled, then +24V-S1-S2 should be short-circuit with jumper wire 17-4 Chapter 17 Safe Torque Off FunctionMH300 17-4 Failure Rate of the Drive Safety Function Please refer to Table below for relevant safe parameters of safe loop: Item SFF HFT (Type A subsystem) SIL Definition Standard IEC61508 Hardware fault tolerance IEC61508 IEC61508 SIL IEC62061 SILCL IEC61508 1.36 x 10-9 IEC61508 5.99 x 10-6 Average frequency of dangerous failure [h-1] Probability of dangerous failure PFDav S1-DCM = 88.35 % Safe failure fraction Safety integrity level PFH Performance on demand S2-DCM = 88.2 % PTI Proof test interval IEC61508 year Category Category ISO13849-1 Category PL Performance level ISO13849-1 d MTTFd Mean time to dangerous failure ISO13849-1 High DC Diagnostic coverage ISO13849-1 Low Table 3: Relevant safe parameters of safe loop 17-5 Reset the Parameter Settings Pr 06-44 can be used to set the reset method when an STO alarm occurs  STO Latch Selection Factory setting: Settings 0: STO Alarm latch 1: STO Alarm no latch  Pr 06-44 = STO Alarm Latch: after the reason of STO Alarm is cleared, a Reset command is needed to clear STO Alarm  Pr 06-44 = STO Alarm no Latch: after the reason of STO Alarm is cleared, the STO Alarm will be cleared automatically  All of STL1~STL3 error are “Alarm latch” mode (in STL1~STL3 mode, the Pr 06-44 function is not effective) 17-5 Chapter 17 Safe Torque Off FunctionMH300 17-6 Timing Diagram Description The following timing diagram shows the status of relevant signals under different conditions: 17-6-1 Normal operation status As shown in Figure 4: When S1~DCM and S2~DCM is ON (STO function is not required), the drive will execute “Operating” or “Output Stop” according to RUN command RUN command STOP RUN S1~DCM input status ON (no function S TO f unct ion required, n eed , Pr.Pr 6-44=0 ) ON (STO is not 06-44=0) S2~DCM input status ON (no function S TO f unct ion required, n eed , Pr.Pr 6-44=0 ) ON (STO is not 06-44=0) Drive out put Operat ing Output stop Figure 17-6-2-1 STO, Pr 06-44=0, Pr 02-35=0 (Selection of external control operation after reset / power on, 0=not valid) As shown in Figure 5: When both of S1~DCM and S2~DCM are OFF during operation (STO function is required), the drive will stop outputting when enter safe mode regardless of Run command is ON or OFF status RUN co mmand STOP RUN S1~DCM input s tatus ON O FF ON S2~DCM input s tatus ON O FF ON Drive out put RUN Operat ing Output stop Figure 17-6-2-2 STO, Pr 06-44=0, Pr 02-35=1 (Selection of external control operation after reset / power on, 1= the drive will execute RUN if command exists after reset) As shown in Figure 6, the action is the same as in Figure However, because Pr 02-35=1, if RUN command still exists after reset, the drive will execute run command again immediately RUN co mman d RUN S1~DCM input status ON O FF ON S2~DCM input status ON O FF ON Dri ve o utput Op erati ng Output stop O per ati ng Res et Res et Figure 17-6 Chapter 17 Safe Torque Off FunctionMH300 17-6-3 STO, Pr 06-44=1 As shown in Figure 7: When both of S1~DCM and S2~DCM are OFF during operation (STO function is required), the drive will stop outputting When the S1 / S2 status is restored (ON), the STO automatic alarm is automatically cleared The drive can output when RUN command is released again S TO P RUN co mmand RUN S1~DCM input status ON OFF ON S2~DCM input status ON OF F ON Dri ve output Operati ng Ou tput sto p RUN O perati ng Figure 17-6-4 STL1, Pr 06-44=0 or As shown in Figure 8: When S1~DCM is OFF during operation (STO function is required) and S2~DCM is ON (STO function is not required), the drive will stop outputting and keypad will show STL1 error However, STL1 error cannot be reset even if the S1 status is restored (ON) regardless of the parameter setting Turn the power on after power off to reset, thereby the drive can restore to normal standby state RUN co mmand S1~DCM input status ON S2~DCM input status ON Dri ve out put ST OP RUN OFF RUN ON Oper ating Ou tput s to p Figure 17-6-5 STL2, Pr 06-44=0 or As shown in Figure 9: When S1~DCM is ON during operation (STO function is not required) and S2~DCM is OFF (STO function is required), the drive will stop outputting and keypad will show STL2 error However, STL2 error cannot be reset even if the S2 status is restored (ON) regardless of the parameter setting Turn the power on after power off to reset, thereby the drive can restore to normal standby state RUN co mmand S1~DCM input status ON S2~DCM input status ON Dr iv e output S TO P RUN O FF ON Operati ng O utp ut s t op Figure 17-7 RUN Chapter 17 Safe Torque Off FunctionMH300 17-7 Error Code and Troubleshooting Instructions 17-7-1 Error Code Description Refer to Pr 06-17 ~ Pr 06-22 for fault record, wherein STO relevant error code is 72/76/77/78, the definition is as follows and Table 4: Fault Record Fault Record Fault Record Fault Record Fault Record Fault Record Settings 72: Channel (S1~DCM) safety loop error (STL1) 76: Safe torque off (STo) 77: Channel (S2~DCM) safety loop error (STL2) 78: Internal loop error (STL3) Error code 76 (STO) 72 (STL1) 77 (STL2) 78 (STL3) Name Description Safe torque off Safe torque off function active Channel (S1~DCM) safety loop error Channel (S2~DCM) safety loop error S1~DCM internal loop detected error S2~DCM internal loop detected error S1~DCM and S2~DCM internal loop Internal loop error detected error Table 4: Error code description 17-8 Chapter 17 Safe Torque Off FunctionMH300 17-7-2 Troubleshooting Instructions Refer to the following instructions for troubleshooting when STO / STL1 / STL2 / STL3 shows on keypad (Refer to Chapter 14 Error Codes) ID No KPMH-LC01 Display Descriptions S1~DCM internal loop detected error Corrective Actions 72  Check wiring of S1 terminal  Reset emergency switch (ON: activated) and re-power  Check the input voltage to maintain at least 11 V  Check the wiring of S1 and +24 V terminal  After make sure all the wiring is correct, if STL1 fault still exists after re-power, please contact Delta Safe torque off function active Corrective Actions 76  Check wiring of S1 and S2 terminal  Reset emergency switch (ON: activated) and re-power  Check the input voltage to maintain at least 11 V  Check the wiring of S1 / S2 and +24 V terminal  After make sure all the wiring is correct, if STO fault still exists after re-power, please contact Delta S2~DCM internal loop detected error Corrective Actions 77  Check wiring of S2 terminal  Reset emergency switch (ON: activated) and re-power  Check the input voltage to maintain at least 11 V  Check the wiring of S2 and +24 V terminal  After make sure all the wiring is correct, if STL2 fault still exists after re-power, please contact Delta Internal loop detected error 78 Corrective Actions  After make sure the wiring is correct, if STL3 fault still exists after re-power, please contact Delta 17-9 Chapter 17 Safe Torque Off FunctionMH300 17-8 Test and Fault Confirmation After wiring in accordance with Section 17-3 Wiring Diagram, please follow the steps below to check whether STO and related detection function are normal When the drive is powered on, make sure that S1~DCM and S2~DCM voltage falls between 11 VDC~30 VDC, at this time, the drive should enter standby mode and waits for RUN command There is no error displayed on keypad Press RUN command on the drive, use the emergency button or other methods to make S1~DCM and S2~DCM voltage falls between VDC~5 VDC simultaneously after the output frequency is reached, at this time, the drive should enter torque stop mode STO and stop outputting voltage Keypad displays STO error, and the response time of S1 and S2 signals to the drive stops outputting voltage should be ≤ 20 ms Then restore S1~DCM and S2~DCM voltage to 11 VDC~30 VDC, press RESET button on keypad and STO error will be cleared The drive should enter standby mode and waits for RUN command Press RUN command on the drive, use the emergency button or other methods to make S1~DCM voltage fall between VDC~5 VDC, and S2~DCM voltage maintain between 11 VDC~30 VDC after the output frequency is reached, at this time, the drive should enter torque stop mode STL1 and stop outputting voltage Keypad displays ST1 error, and the response time of S1 signals to the drive stops outputting voltage should be ≤ 20 ms Then restore S1~DCM voltage to 11 VDC~30 VDC, however press RESET button on keypad cannot clear STL1 error, the drive needs to be re-powered Make sure that S1~DCM and S2~DCM voltage falls between 11 VDC~30 VDC and then re-power the drive, thus STL1 error will be cleared The drive should enter standby mode and waits for RUN command Press RUN command on the drive, please use the emergency button or other methods to make S2~DCM voltage fall between VDC~5 VDC, and S1~DCM voltage maintain between 11 VDC~30 VDC after the output frequency is reached, at this time, the drive should enter torque stop mode STL2 and stop outputting voltage Keypad displays ST2 error, and the response time of S2 signals to the drive stops outputting voltage should be ≤ 20 ms Then restore S2~DCM voltage to 11 VDC~30 VDC, however press RESET button on keypad cannot clear STL1 error, the drive needs to be re-powered Make sure S1~DCM and S2~DCM voltage falls between 11 VDC~30 VDC and then re-power the drive, thus STL2 error will be cleared The drive should enter standby mode and waits for RUN command If the above four steps can be conducted normally in sequence with no other error, then the safe torque off function loop is normal, as shown in Table below However, if there are situations differ from the above four steps or if STL3 occurs, the safe torque off function loop is abnormal Please refer to 17-7 Error Code and Troubleshooting Instructions 17-10 Chapter 17 Safe Torque Off FunctionMH300 Signal Status S1~DCM ON ON OFF OFF S2~DCM ON OFF ON OFF Drive output Ready to output STL2 mode (Torque output off) STL1 mode STO mode (Torque output off) (Torque output off) Error displayed on keypad No error displayed STL2 STL1 STO Response time N.A RESET mechanism N.A ≤ 20 ms Re-power the drive Re-power the drive Can be RESET directly Table  STO means channel and operate simultaneously and enter Safe Torque Off  STL1 means channel operates  STL2 means channel operates  STL3 means there is error detected in the internal circuit of channel or channel  S1~DCM / S2~DCM ON: means S1~ DCM / S2~DCM inputs a power supply > 11 VDC  S1~ DCM / S2~DCM OFF: means S1~ DCM / S2~DCM inputs a power supply < VDC 17-11 ... drive DO NOT use phase-compensation capacitors or L-C (Inductance-Capacitance) or R-C (Resistance-Capacitance), unless approved by Delta DO NOT connect brake resistor directly to +1/DC+ to DC-,.. .Delta High Performance Compact Drive MH300 Series User Manual Industrial Automation Headquarters Delta Electronics, Inc Taoyuan Technology Center... short-circuits between the terminals or to ground? 4-2 Chapter Wiring? ?MH300 4-1 Wiring 4-3 Chapter Wiring? ?MH300 Figure 4-4 Chapter Wiring? ?MH300 Figure SINK (NPN) / SOURCE (PNP) Mode S i n k Mo d e wi