Loop Table Word Definitions - Automation Direct DL05 User Manual

Chapter 8: PID Loop Operation

Loop Table Word Definitions

1
These are the loop parameters associated with each of the four loops available in the DL05.
The parameters are listed in the following table. The address offset is in octal, to help you
2
locate specific parameters in the loop table. For example, if a table begins at V2000, then the
location for the reset (integral) term is Addr+11, or V2011. Do not use the Word # (in the
3 first column) to calculate addresses.
Word #
4
1
2
5
3
4
6
5
6
7
7
8
9
8
10
11
12
9
13
14
10
15
16
17
11
18
19
12
20
21
22
13
23
24
14
25
26
27
A
28
29
B
30
31
32
C
* Read data only when alarm enable bit transitions from 0 to 1.
D
** Read data only on PLC Mode change.
*** Read on-the-fly means that the content of V-memory can be changed while the PID loop is in
operation.
8–20
DL05 Micro PLC User Manual, 6th Edition, Rev. A
Address+Offset
Addr + 0 PID Loop Mode Setting 1
Addr + 1 PID Loop Mode Setting 2
Addr + 2 Setpoint Value (SP)
Addr + 3 Process Variable (PV)
Addr + 4 Bias (Integrator) Value
Addr + 5 Control Output Value
Addr + 6 Loop Mode and Alarm Status
Addr + 7 Sample Rate Setting
Addr + 10 Gain (Proportional) Setting
Addr + 11 Reset (Integral) Time Setting
Addr + 12 Rate (Derivative) Time Setting
Addr + 13 PV Value, Low-low Alarm
Addr + 14 PV Value, Low Alarm
Addr + 15 PV Value, High Alarm
Addr + 16 PV Value, High-high Alarm
Addr + 17 PV Value, deviation alarm (YELLOW)
Addr + 20 PV Value, deviation alarm (RED)
Addr + 21 PV Value, rate-of-change alarm
Addr + 22 PV Value, alarm hysteresis setting
Addr + 23 PV Value, error deadband setting
Addr + 24 PV low-pass filter constant
Addr + 25 Loop derivative gain limiting factor setting
Addr + 26 SP value lower limit setting
Addr + 27 SP value upper limit setting
Addr + 30 Control output value lower limit setting
Addr + 31 Control output value upper limit setting
Addr + 32 Remote SP Value V-Memory Address Pointer
Addr + 33 Ramp/Soak Setting Flag
Addr + 34 Ramp/Soak Programming Table Starting Address
Addr + 35 Ramp/Soak Programming Table Error Flags
Addr + 36 PV direct access, channel number
Addr + 37 Control output direct access, channel number
Description
Read on-
Format
the- fly***
bits Yes
bits Yes
word/binary Yes
word/binary Yes
word/binary Yes
word/binary Yes
bits –
word/BCD Yes
word/BCD Yes
word/BCD Yes
word/BCD Yes
word/binary No*
word/binary No*
word/binary No*
word/binary No*
word/binary No*
word/binary No*
word/binary No*
word/binary No*
word/binary Yes
word/BCD Yes
word/BCD No**
word/binary Yes
word/binary Yes
word/binary No**
word/binary No**
word/hex Yes
bit Yes
word/hex No**
bits No**
word/hex Yes
word/hex Yes