Rockwell Automation 1771-PD PID MODULE (+DU) - Manual (Page 57)

Programming
Chapter 3
3Ć14
W02 B00 PID Algorithm. Reset to 0 the PID module uses A-B gain
values. Set to 1 the PID module uses ISA values.
W03 Dynamic Block Start Address. This word contains the data table
address of the first word in the file associated with the dynamic block.
The address is required by the PID module to prompt the transfer of the
dynamic block.
W04 Loop 1 Block Start Address. This word contains the data table
address of the first word in the file associated with the loop 1 block. The
address is required by the PID module to prompt the transfer of loop 1
constants.
W05 Set analog Output 1, SET OUT1. The value stored in this word
becomes the analog output when W01 B01 = 1.
Normally, the PID module outputs the PID algorithm value when W01
B-1 = 0. Data format is 4-digit BCD or 12-bit binary. Format is
determined by W01 B12. Range is 0000 to 4095.
W06 Set Point 1, SP1. This word contains the set point value for loop 1.
Data format is 4-digit BCD or 12 bit binary as selected by W01 B11. The
unscaled range is 0000 to 4095.
When set point scaling is selected, the data format should be 4-digit BCD.
Scaling can be selected by B16=1 in word W30 when expanded loop
features are selected by W01 B14 = 1. The sign bit W19 B07 and the x10
multiplier bit W19 B06 determine the range which can be +99990.
When scaling is selected, words W31 and W32 must contain the
minimum and maximum range values SMIN1 and SMAX1, respectively.
Refer to section titled Scaling for additional information about scaling.
W07 Proportional Gain 1, Kp1 (Kc1). This word contains the
proportional gain constant for loop 1. The value is the same for A-B
(Kp1) or ISA (Kc1), selected by W02 B00. Data format is 4 digit BCD
(99.99 dimensionless) with implied decimal point. Multiplier bit W19
B04, B05 can be selected for x1, divided by 10, x10, x100 (Table 3.F,
Multiplier Codes). By using multipliers, the range can be extended from
0.000 to 9999.