Publication 1763-RM001C-EN-P - October 2009
Process Control Instruction
289
Tuning Parameters
The table below shows the tuning parameter addresses, data formats, and
types of user program access. See the indicated pages for descriptions of
each parameter.
Controller Gain (K
c
)
Gain K
c
(word 3) is the proportional gain, ranging from 0 to 3276.7 (when
RG = 0), or 0 to 327.67 (when RG = 1). Set this gain to one-half the value
needed to cause the output to oscillate when the reset and rate terms
(below) are set to zero.
Tuning Parameter
Descriptions
Address
Data Format Range
Type
User
Program
Access
For More
Information
KC - Controller Gain - K
c
PD10:0.KC
word (INT)
0 to 32,767
control
read/write
TI - Reset Term - T
i
PD10:0.Ti
word (INT)
0 to 32,767
control
read/write
TD - Rate Term - T
d
PD 10:0.TD
word (INT)
0 to 32,767
control
read/write
TM - Time Mode
PD10:0.TM
binary
0 or 1
control
read/write
LUT - Loop Update Time
PD10:0.LUT
word (INT)
1 to 1024
control
read/write
ZCD - Zero Crossing Deadband
PD10:0.ZCD
word (INT)
0 to 32,767
control
read/write
FF - Feed Forward Bias
PD10:0.FF
word (INT)
-16,383 to +16,383
control
read/write
SE - Scaled Error
PD10:0.SE
word (INT)
-32,768 to +32,767
status
read only
AM - Automatic/Manual
PD10:0/AM
binary (bit)
0 or 1
control
read/write
CM - Control Mode
PD10:0/CM
binary (bit)
0 or 1
control
read/write
DB - PV in Deadband
PD10:0/DB
binary (bit)
0 or 1
status
read/write
RG - PLC 5 Gain Range
PD10:0/RG
binary (bit)
0 or 1
control
read/write
SC - Setpoint Scaling
PD10:0/SC
binary (bit)
0 or 1
control
read/write
TF - Loop Update Too Fast
PD10:0/TF
binary (bit)
0 or 1
status
read/write
DA - Derivative Action Bit
PD10:0/DA
binary (bit)
0 or 1
control
read/write
UL - CV Upper Limit Alarm
PD10:0/UL
binary (bit)
0 or 1
status
read/write
LL - CV Lower Limit Alarm
PD10:0/LL
binary (bit)
0 or 1
status
read/write
SP - Setpoint Out of Range
PD10:0/SP
binary (bit)
0 or 1
status
read/write
PV - PV Out of Range
PD10:0/PV
binary (bit)
0 or 1
status
read/write
DN - Done
PD10:0/DN
binary (bit)
0 or 1
status
read only
EN - Enable
PD10:0/EN
binary (bit)
0 or 1
status
read only
IS - Integral Sum
PD10:0.IS
long word
(32-bit INT)
-2,147,483,648 to
2,147,483,647
status
read/write
AD - Altered Derivative Term
PD10:0.AD
long word
(32-bit INT)
-2,147,483,648 to
2,147,483,647
status
read only
Tuning Parameter
Descriptions
Address
Data Format Range
Type
User Program
Access
KC - Controller Gain - K
c
PD10:0.KC
word (INT)
0 to 32,767
control
read/write
efesotomasyon.com - Allen Bradley,Rockwell,plc,servo,drive