User Manual

High−level Instructions
3 − 773
2−1: Auto−tuning bias value (S4+6)
Auto−tuning is executed with (set value (SP) − auto−tuning bias value) as a set value (SP’).
It is used to control excessive temperature rise while auto−tuning is performed.
For the forward operation, auto−tuning is executed with (set value (SP) + this set value) as a set value.
Temperature
During auto−tuning
KP, TI and TD calculation
PID control
Auto−tuning in reverse operation
Time
Set value
(SP)
Auto−tuning bias value
(SP’)
Auto−tuning in forward operation
Temperature
KP, TI and TD calculation
PID control
Time
Set value
(SP)
Auto−tuning bias value
(SP’)
During auto−tuning
Note) Even if starting auto−tuning in the condition that measured value (PV) is close to set value (SP),
auto−tuning is performed with the above SP’.