Rockwell Automation 1756-DMF30 ControlLogix Drive Module - Manual (Page 247)

Publication 1756-UM522B-EN-P - February 2003
1756-DMD30 Specific Information B-167
Parameter 2123 [MC Warnings]
This parameter indicates the occurance of a motor-control warning
event. These bits are set when a warning 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 warning event remains present, the identifying bit is set again.
Refer to parameter 381 [PMI Warning Cnfg] to configure the Drive
Module's response to these warnings.
9 ResolverCard A fuse on the Resolver & Drive l/O module has blown.
10 Over Speed The motor’s speed has gone above the value in parameter
31 [Fwd Speed Lim] by more than the value in parameter 335
[Abs Overspd Lim], or gone below the value of parameter
[Rev Speed Lim] by more than the value in parameter 335.
11 PwrTech Card The watchdog timer on the D-C Power Technology module
has expired. This fault disables the gate firing circuitry.
12 PMI Pwr Sply The PMI power supply is not working correctly.
13 PMI Bus There is a bus fault in the PMI rack. This is indicated when
the Resolver and Drive l/O module and the DC Power
Technology module do not respond to requests from the PMI
Processor. This error indicates that there is a hardware
problem in the rack.
15 PMI CommLoss Communication between the PMI processor and the Drive
Module has failed.
Bit Fault Name Fault Description
0 BrdgNotFirng Not all SCRs are carrying the same the load. A bit set in the
parameter 2124 [Pwr DeviceStatus] indicates which SCR is
not working properly.
1 Low AC Line AC line voltage is less than 85% of its nominal value, which
was entered as a configuration parameter. This can be
caused by a low-line condition or a missing phase. The
system will automatically adjust the phase angle to give the
correct current amount and will continue to fire SCRs as
long as zero crossings are detected. If zero crossings are no
longer detected, a fault condition will result.
3 LineSyncLoss The system is continuing to operate through a temporary
loss of AC line voltage. Refer to bit 3 [AC Line Sync] of
parameter 2122 [MC Fault].
4 Curr Ref Lim The current reference has exceeded the value entered in
parameter 2184 [PMI Curr Lim].
Bit Fault Name Fault Description