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PPC Manual Revision 1
Preface
6.1.4 Cascade Control .................................................................................................................................6-8
6.1.5 Loop Control for Backup ...................................................................................................................6-10
6.1.6 Loop Control with PV Switching ........................................................................................................6-12
6.1.7 Loop Control with PV Auto-selector ..................................................................................................6-14
6.1.8 Loop Control with PV-hold Function .................................................................................................. 6-16
6.2 Setting Control Type (CNT) ............................................................................................................. 6-18
6.2.1 PID Control .......................................................................................................................................6-19
6.2.2 ON/OFF Control (1 point of hysteresis / 2 points of hysteresis) ........................................................ 6-20
6.2.3 PD Control (Stable Control in Which a Setpoint is not Exceeded) .................................................... 6-22
6.2.4 Sample PI Control (Controlling a Process with Long Dead Time) ....................................................6-23
6.2.5 Batch PID Control (Performing Control with Rapidly Settling Setpoints) ..........................................6-25
6.3 Setting PID Control Mode (ALG) ..................................................................................................... 6-27
6.4 Switching PID .................................................................................................................................. 6-29
6.4.1 Switching PID According to Target Setpoint Number (SPNO) ..........................................................6-29
6.4.2 Switching PID According to PV .........................................................................................................6-30
6.4.3 Switching PID According to SP .........................................................................................................6-32
6.4.4 Switching PID According to Target SP ..............................................................................................6-34
6.4.5 Switching PID According to Deviation (Reference Deviation) ........................................................... 6-36
6.4.6 Setting Hysteresis at Time of PID Switch .......................................................................................... 6-37
6.4.7 Switching PID by Contact Input ........................................................................................................6-37
6.5 Suppressing Overshoot (Super Function) ....................................................................................... 6-38
6.6 Suppressing Hunting (Super2 Function) ......................................................................................... 6-40
6.7 Suppressing Integral Action (Anti-reset Wind-up) ....................................................................................6-42
6.8 Performing Non-linear PID Control .................................................................................................. 6-43
6.9 Adjusting Auto-tuning Operation ..................................................................................................... 6-44
Chapter 7 - Setpoint Functions ...............................................................................7-1
7.1 Setting SP Limiter .............................................................................................................................. 7-2
7.2 Changing SP at a Fixed Rate (SP Ramp-Rate Setting Function) ..................................................... 7-3
7.3 Forcing SP to Track PV (PV Tracking) .............................................................................................. 7-5
7.4 Forcing SP to Track Remote Input (SP Tracking) .................................................................................7-6
Chapter 8 - Output Setting Functions .....................................................................8-1
8.1 Setting Control Output Type .............................................................................................................. 8-2
8.2 Setting Control Output Cycle Time .................................................................................................... 8-4
8.3 Setting Limiter to Control Output ....................................................................................................... 8-5
8.4 Disabling Output Limiter in MAN mode ............................................................................................. 8-6
8.5 Setting Velocity Limiter to Control Output .......................................................................................... 8-7
8.6 Reducing 4-20 mA Current Output to 0 mA (Tight Shut Function) .................................................... 8-8
8.7 Setting ON/OFF Control Hysteresis .................................................................................................. 8-9
8.8 Canceling Offset of PV and SP (Manual Reset) .............................................................................. 8-11
8.9 Setting Retransmission Output Terminal, Type, and Scales ........................................................... 8-12
8.10 Setting Preset Output Value ............................................................................................................ 8-14
8.10.1 Setting Output Value in STOP Mode (Preset Output) .......................................................................8-14
8.10.2 Setting Output Value When Switched to MAN Mode (Manual Preset Output) ..............................................8-15
8.10.3 Setting Output Value When Error Occurs (Input Error Preset Output) .............................................. 8-17
8.11 Setting 10-segment Linearizer for Output ....................................................................................... 8-18
8.12 Changing Current Output Range ..................................................................................................... 8-20
8.13 Setting Split Computation Output Function ..................................................................................... 8-21
8.14 Using 15 V DC Loop Power Supply ................................................................................................ 8-23