Publication 1763-RM001C-EN-P - October 2009
294 Process Control Instruction
PLC 5 Gain Range (RG)
When set (1), the reset (TI) and gain range enhancement bit (RG) causes
the reset minute/repeat value and the gain multiplier (KC) to be divided
by a factor of 10. That means a reset multiplier of 0.01 and a gain
multiplier of 0.01.
When clear (0), this bit allows the reset minutes/repeat value and the gain
multiplier value to be evaluated with a reset multiplier of 0.1 and a gain
multiplier of 0.1.
Example with the RG bit set: The reset term (TI) of 1 indicates that the
integral value of 0.01 minutes/repeat (0.6 seconds/repeat) is applied to
the PID integral algorithm. The gain value (KC) of 1 indicates that the
error is multiplied by 0.01 and applied to the PID algorithm.
Example with the RG bit clear: The reset term (TI) of 1 indicates that the
integral value of 0.1 minutes/repeat (6.0 seconds/repeat) is applied to the
PID integral algorithm. The gain value (KC) of 1 indicates that the error is
multiplied by 0.1 and applied to the PID algorithm.
Setpoint Scaling (SC)
The SC bit is cleared when setpoint scaling values are specified.
Tuning Parameter
Descriptions
Address Data Format Range Type User Program
Access
RG - PLC 5 Gain Range PD10:0/RG binary (bit) 0 or 1 control read/write
TIP
The rate multiplier (TD) is not affected by this selection.
Tuning Parameter
Descriptions
Address Data Format Range Type User Program
Access
SC - Setpoint Scaling PD10:0/SC binary (bit) 0 or 1 control read/write
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