Appendix A: Communication A.4 Front Panel Usage
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Changing Loops
You can select loops by pressing the Next key until the display shows “Loop”, and
then selecting the desired loop.
A.4 Front Panel Usage
If the Communication Mode is Local, the front panel is operable as usual.
If the Communication Mode is Computer, the operator can inspect all posts in the
list of operator choices. But there are just four posts that can be operated:
• Communication Mode (in order to switch back to Local Mode)
• Control Mode (in order to switch between Automatic and Manual Mode)
• Output Signal (when the Control Mode is Manual)
• Displayed Loop (in order to switch between display of Loop1 and Loop2 when
controlling multiple loops)
All other functions are disabled.
A.5 Communication Area Mapping
A supervisory system gains access to the controller’s parameters via I/O bits and
registers. The description below are common both for Comli and Modbus.
I/O RAM Map
Variable Access Address Bit Position
Hex Oct Dec 7 6 5 4 3 2 1 0
DICx Read/Write 0000
16
0000
8
0000
10
DIC8 DIC7 DIC6 DIC5 DIC4 DIC3 DIC2 DIC1
DICx Read/Write 0008
16
0010
8
0008
10
DIC12 DIC11 DIC10 DIC9
DOCx Read 0010
16
0020
8
0016
10
DOC8 DOC7 DOC6 DOC5 DOC4 DOC3 DOC2 DOC1
DOCx Read 0018
16
0030
8
0024
10
DOC12 DOC11 DOC10 DOC9
DIx Read 0020
16
0040
8
0032
10
DI4 DI3 DI2 DI1
DUx Read 0028
16
0050
8
0040
10
DU8 DU7 DU6 DU5 DU4 DU3 DU2 DU1
DOx Read 0030
16
0060
8
0048
10
DO6 DO5 DO4 DO3 DO2 DO1
Control
Mode
Read 0038
16
0070
8
0056
10
Tuning
Loop1
Tracking
Loop1
Forced
Loop1
Manual
Loop1
Auto
Loop1
Control
Mode
Read 0040
16
0100
8
0064
10
Tuning
Loop2
Tracking
Loop2
Forced
Loop2
Manual
Loop2
Auto
Loop2
System
Errors
Read 0048
16
0110
8
0072
10
Sys Err
RAM
Sys Err
FLASH
Chks
Sys Err
FLASH
Erase
Sys Err
FLASH
Write
Sys Err
HW
Errors Read 0050
16
0120
8
0080
10
DO o.load SampT
Err