PID Loop Operation
Maintenance
and T
roubleshooting
8–8
PID Loop Operation
The parameters associated with each loop are listed in the following table. The
address offset is in octal, to help you locate specific parameters in a loop table. For
example, if a table begins at V2000, then the location of the reset (integral) term is
Addr+11, or V2011. Do not use the word# (in the first column) to calculate addresses.
Word #
Offset
Description
Format
1
Addr + 0
PID Loop Mode Setting 1
bits
2
Addr + 1
PID Loop Mode Setting 2
bits
3
Addr + 2
Setpoint Value (SP)
word/binary
4
Addr + 3
Process Variable (PV)
word/binary
5
Addr + 4
Bias (Integrator) Value
word/binary
6
Addr + 5
Control Output Value
word/binary
7
Addr + 6
Loop Mode and Alarm Status
bits
8
Addr + 7
Sample Rate Setting
word/BCD
9
Addr + 10
Gain (Proportional) Setting
word/BCD
10
Addr + 11
Reset (Integral) Time Setting
word/BCD
11
Addr + 12
Rate (Derivative) Time Setting
word/BCD
12
Addr + 13
PV Value, Low-low Alarm
word/binary
13
Addr + 14
PV Value, Low Alarm
word/binary
14
Addr + 15
PV Value, High Alarm
word/binary
15
Addr + 16
PV Value, High-high Alarm
word/binary
16
Addr + 17
PV Value, deviation alarm (YELLOW)
word/binary
17
Addr + 20
PV Value, deviation alarm (RED)
word/binary
18
Addr + 21
PV Value, rate-of-change alarm
word/binary
19
Addr + 22
PV Value, alarm hysteresis setting
word/binary
20
Addr + 23
PV Value, error deadband setting
word/binary
21
Addr + 24
PV low-pass filter constant
word/BCD
22
Addr + 25
Loop derivative gain limiting factor setting
word/BCD
23
Addr + 26
SP value lower limit setting
word/binary
24
Addr + 27
SP value upper limit setting
word/binary
25
Addr + 30
Control output value lower limit setting
word/binary
26
Addr + 31
Control output value upper limit setting
word/binary
27
Addr + 32
Remote SP Value V-Memory Address Pointer
word/hex
28
Addr + 33
Ramp/Soak Setting Flag
bit
29
Addr + 34
Ramp/Soak Programming Table Starting Address
word/hex
30
Addr + 35
Ramp/Soak Programming Table Error Flags
bits
31
Addr + 36
PV direct access, channel number
word/hex
32
Addr + 37
Control output direct access, channel number
word/hex
Loop Table
Word Definitions
Summary of Contents for DL05
Page 1: ...DL05 User Manual Automationdirect com ...
Page 2: ...DL05 User Manual Automationdirect com ...
Page 436: ...1B DL05 Error Codes In This Appendix Ċ Error Code Table ...
Page 443: ...1C Instruction Execution Times In This Appendix Ċ Introduction Ċ Instruction Execution Times ...
Page 459: ...1D Special Relays In This Appendix Ċ DL05 PLC Special Relays ...
Page 464: ...1E DL05 Product Weights In This Appendix Ċ Product Weight Table ...