Yokogawa Data Acquisition with PID Control CX2000 - Manual (Page 68)

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IM 04L31A01-01E
1.12 Tuning
Selecting Tuning Parameters
Up to 21 tuning parameters can be shown on the tuning display. The parameters are
initially assigned as shown below. The name of the tuning parameters (such as SP) can
be changed using up to 6 characters. In addition to the tuning parameters below, [DR]
(control direction) and [H] (relay hysteresis) are available.
SP
(target setpoint) D (derivative time) BS1 (measured value 1 input bias)*
A1 (alarm 1 setpoint) OH (High limit of the output limiter) FL1 (measured value 1 input filter)*
A2 (alarm 2 setpoint) OL (Low limit of the output limiter) BS2 (measured value 2 input bias)*
A3 (alarm 3 setpoint) MR (manual reset) FL2 (measured value 2 input filter)*
A4 (alarm 4 setpoint) PO (preset output) RT (ratio setting)*
P (proportional band) RBS (remote input bias)*
I (integral time) RFL (remote input filter)*
W01 to W36
(control computation constant)*
* Applies to style number S3 or later
BS1, FL1, BS2, FL2, RFL, and W01-W36 cannot be selected when PV/SP computation is ON.
Manual Tuning Operation
On the tuning display as shown below, you can select the parameter you wish to tune
using the arrow keys and change the value.
Auto Tuning the PID Constant
On the tuning display, select the PID number you wish to auto-tune and execute auto tuning.