Distrubuted control system training Part 3

June 2012 Yokogawa Electric Corporation YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT CENTUM VP ENGINEERING COURSE Yokogawa Vietnam Co Ltd Service Department YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT Engineering Course Schedule for the day: Day Regulatory Control Function Sequence Control Function Laboratory Work YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT Regulatory Control Regulatory control blocks are functions blocks that perform control computation processing mainly on the analog input signals The calculated results are used for process monitoring and process control YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT Types of Regulatory Control Input Indicator: PVI, PVI-DV Controller: PID, PI-HLD, PID BSW, ONOFF, PID TP, PD MR, PI BLEND, PID STC Manual loader: MLD, MLD-SW, MC2, MC3 Signal selector: SS-H/M/L/SS Dual Signal distributor: Split, FOUT YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT Function Block Diagram Terminals Data Processing Units YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT Page.6 Input Processing The function blocks are provided with various types of input processing methods to convert the input signals for the calculation and arithmetic calculations Digital filter reduce noise in the Input PV/FV/CPV Scale out if data status is BAD, PV set to SH or signal SL Signal read from Input module is converted to PV Calibration for maintenance or test purposes PV can be manual set YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT Output Processing Output processing execute certain process to the values obtained from the control computation before output it Output velocity Limiter: limits amount of change bet current and previous out to Preset Manipulated Output: upon an ext command, the block is put to manual and MV to a avoid bumps predetermined value Output Limiter: limits the MV tobe within high and low limits (MHI or MLO) Output Tracking: forces the output value to match the value of its output destination Output signal conversion: converts the result of the calculation process compatible with the output destination YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT PID Block Terminal YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT PID Function Block The PID Controller Block (PID) provides the most general control function to perform proportional-integral-derivative control based on the deviation of the process variable (PV) from the setpoint value (SV) YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT Sequence Control Sequence Table Block The conditions and operations are arranged in table format and specifies with operation is performed by the combination of conditions This is suitable for the description of all sequences such as the parallel operation, interlock operation and sequence operation Sequence Table Block (ST16) - 64 I/O Signals , 32 rules (Up to 32 condition signals and 32 action signals for a total of 64 signals) YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT Sequence Table Display Area The operator can monitor the control status of the sequence control block Function block information Rule numbers Step labels Label name of the step currently in progress Signal comment/ Tag comment Condition rules Condition signals Operation rules Operation signals Extended table YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT Labels for next step Sequence Table - Stepless Red : Operation satisfied Green : Operation not satisfied Yellow : Not executing ( in the case of ST with a step label display) or ST block is in MAN or O/S mode Y : Yes N : No Red : Condition Satisfied Cyan : Condition not satisfied YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT Sequence Table - Stepless YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT Sequence Table - Step The process control sequence of a phase-step process is divided into the smallest steps of the condition monitoring and operation, then these steps are executed one by one Only step label 00 and the rule corresponding to the current step number are subject to condition testing and operation Red : Operation satisfied Green : Operation not satisfied Yellow : Not executing ( in the case of ST with a step label display) or ST block is in MAN or O/S mode Only the step currently being executed is subject to condition testing Y : Yes N : No Red : Condition Satisfied Cyan : Condition not satisfied only the operations for the rules whose conditions are satisfied in the step currently being executed, are executed YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT Sequence Table - Step YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT Sequence Table - Step YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT Sequence Table Process Timing Process Timing: • TE : Periodic start (T), output each time condition is satisfied (E) • TC :Periodic start (T), output only when condition changes (C) • OE :One-shot start (O), output each time condition is satisfied (E) • OC : One-shot start (O), output only when condition changes (C) • I : On initial cold start/restart (I) • B : On initial cold start (B) Periodic Execution (T) The periodic execution means that the sequence control block is repeatedly executed in a preset cycle One-Shot Execution (O) In one-shot execution, sequence block is executed only once when it is invoked by other function blocks Initial Execution/Restart Execution (I) In initial execution/restart execution, the sequence block executes its process when the FCS performs a cold start or a restart Restricted Initial Execution (B) In restricted initial execution (B), the sequence control block executes only when the FCS performs a cold start, not include restart YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT Sequence Control Logic Chart Block (LC64) In logic Chart Block, the conditions and operations are listed and the combination of conditions with the logic operators corresponding to the logic requirement many manipulate the operation signals This block can be used as the description of an interlock sequence control or logic chart 32 input and 32 output signal channels and it can handle 64 logic operators YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT Logic Chart Display Area Prints out logic chart window currently displayed Calls up the dialog box for setting zoom levels The color of the line changes according to the progress of the process A data value indicating the completion status When the output wiring for the input element is completed, it is (complete:1,incomplete:0) is displayed on the wiring displayed in red, and in green when incomplete YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT Logic Chart Process Timing Process Timing: • TE : Periodic start (T), output each time condition is satisfied (E) • OE :One-shot start (O), output each time condition is satisfied (E) • I : On initial cold start/restart (I) • B : On initial cold start (B) YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT Sequence Control - SFC The SFC block is a graphical flow diagram suitable for describing a process control sequence The SFC is used for relatively large-scaled sequence controls and for controlling devices The flow of the entire sequence is defined by the SFC block Each step in the SFC is described by the sequence table and SEBOL (Sequence and Batch Oriented Language) YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT CALCU Function Block The General-Purpose Calculation Block (CALCU) is a function block that executes predefined arbitrary calculation algorithms Calculation algorithms are defined using the general-purpose calculation expression description language YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT CALCU Function Block Example script of CALCU FB: YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT END OF PRESENTATION YOKOGAWA VIETNAM CO.LTD Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT ... Copyright © Yokogawa Electric Corporation SERVICE DEPARTMENT Engineering Course Schedule for the day: Day Regulatory Control Function Sequence Control Function Laboratory Work YOKOGAWA VIETNAM CO.LTD