4-30
IM 04L51B01-01EN
PID Control Module Status Information
The following status information of each loop is output in unit of modules to channels 35 to
50.
Item Description
Control alarm information Alarms 1 to 4 lower 4 bits
Auto/manual/cascade status 1: Auto, 2: Manual, 3: Cascade
Run/stop status 1: Run, 2: Stop
Remote/local status 1: Local, 2: Remote
Target setpoint number (SP number) selection 1 to 8
PID number selection 1 to 8, 9 for the reference PID
Auto-tuning status 1 to 8 for when auto-tuning is in progress
9 for the reference PID
0 when stopped
Alarm ACK 0 when read
Error code Meaning
0 No error
1 Skip
2 +Over
3 –Over
4 +Burnout
5 –Burnout
6 A/D error
7 Invalid data
16 Computation error
17 Communication error
5 bits 4 bits
Status information
Alarm list
0
Reserved
area
Error code
RJC error
A/D calibration
value error
0 0 0 0
Level 2
Level 3
Level 4
Higher
Lower
4.5 Modbus Function and Register Assignments
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