Rockwell Automation 1756-DMF30 ControlLogix Drive Module - Manual (Page 360)

Publication 1756-UM522B-EN-P - February 2003
C-108 1756-DMF30 Specific Information
Parameter 2124 [Pwr Device Status]
The bits of this parameter indicate which SCR has shorted or not
firing. If an SCR is shorted parameter 2122 [MC Faults] bit 0 [SCR
Fault] will be set. If an SCR is not firing correctly parameter 2123 [MC
Warnings] bit 0 [BrdgNotFirng]will be set.
For a regenerative drive, this parameter indicates the pair of SCRs that
has faulted. For a non-regenerative drive, this parameter indicates the
specific SCR that has faulted.
The bits of this parameters are set when a fault event is detected.
They stay latched until bit 19 [Clear Fault] of parameter 152 [Applied
Logic Cmd] or bit 19 [Clr Drv Wrn] of parameter 166 [Motor Ctrl Cmd]
is set. If the fault event remains present, the identifying bit is set
again.
12 PMI Fan Loss Airflow through the PMI rack is not being sensed. A
solid-state airflow switch in the PMI power supply
monitors airflow.
13 Rail IO Comm A rail communication warning event has occurred.
Parameter 2044 [Rail Port 0 Faul] and parameter 2050
[Rail Port 0 Faul] enumerate these faults.
14 PMI CommSync The PMI Processor and the Drive Module are
momentarily not synchronized.
15 PMI Comm A fiber-optic communication error has been detected
between the PMI Processor module and the Drive
Module. Communication errors in two consecutive
messages will cause a fault.
Bit Fault Name Fault Description
0 SCR 1 Fault SCR 1 Fault (Forward Bridge)
1 SCR 2 Fault SCR 2 Fault (Forward Bridge)
3 SCR 3 Fault SCR 3 Fault (Forward Bridge)
4 SCR 4 Fault SCR 4 Fault (Forward Bridge)
5 SCR 5 Fault SCR 5 Fault (Forward Bridge)
6 SCR 6 Fault SCR 6 Fault (Forward Bridge)
7 SCR 11 Fault SCR 11 Fault (Reverse Bridge)
8 SCR 12 Fault SCR 12 Fault (Reverse Bridge)
9 SCR 13 Fault SCR 13 Fault (Reverse Bridge)
Bit Fault Name Fault Description