YOKOGAWA F3CU04-0S User Manual

C5-6
IM 34M06H62-02E 2nd Edition : June 2008-00
Figure C5.3 Auto-tuning with Zone PID
When Zone PID Selection (ZONE) is 1 (Enabled), the tuning point is automatically
calculated and auto-tuning is performed. To avoid exceeding the temperature limits of the
controlled object, you can set upper and lower range limits. The upper and lower range
limits are RH and RL for thermocouple/RTD input, SH and SL for direct voltage input, and
PRH and PRL for two-input changeover control.
Table C5.5 Parameters Related to Auto-tuning
Data Position Number
Symbol Description Unit Data Range Default Value Attribute
Stored
Loop1 Loop2 Loop3 Loop4
127 327 527 727 AT Start auto-tuning None
0: Stop AT
1-5: Start AT
(reverts to zero when
auto-tuning
completes)
0 RW —
111 311 511 711 AT.STUS Auto-tuning status None
0: Normal exit
1: Executing
2: Manually stopped
3: Error exit
— RO —
185 385 585 785 ZONE Zone PID selection None
0: Disabled
1: Enabled
0 RW 
186 386 586 786 1RP Reference point 1 Industrial unit PRL to PRH PRL RW 
187 387 587 787 2RP Reference point 2 Industrial unit PRL to PRH PRL RW 
188 388 588 788 RHY
Zone switching
hysteresis
Industrial unit 0 to (PRH-PRL)
(PRH – PRL)
× 0.5%
RW 
189 389 589 789 RDV Reference deviation Industrial unit
0 to (PRH-PRL);
Function is disabled
when value is 0.
0 RW 

YOKOGAWA F3CU04-0S Specifications

General

Brand	YOKOGAWA
Model	F3CU04-0S
Category	Control Unit
Language	English