Rockwell Automation Publication 1560F-UM001A-EN-P - June 2019 191
Chapter 10
Maintenance
Preventive Maintenance
Protection
Preventive Maintenance (PM) Hours Protection—Fault and Alarm
PM Hours Fault (Code 50) and Alarm
You can configure the SMC-50 control module to provide a Fault and/or Alarm
to indicate that PM should be performed after a programmed number of hours
have elapsed, Fault Code 50. Do this by setting a value in the Time to PM,
Parameter 21, to indicate the amount of running time before PM needs to be
done.
The programmed Time to PM value counts down while the motor is starting,
stopping, and running. When the Time to PM parameter value reaches zero, the
configured Fault and/or Alarm condition is activated and the parameter counter
stops decrementing.
After the preventive maintenance is complete, you can reset the Fault and/or
Alarm. You must reload the Time to PM to the value configured and stored in
the PM Hours, Parameter 126, through the Meter Reset, Parameter 16, via the
HIM or network connection.
Enable the PM Hours Fault by using the PM Hours bit in the Motor Fault
Enable, Parameter 230. The PM Hours Alarm is enabled using the PM Hours bit
in the Motor Alarm Enable, Parameter 231.
Table 64 - PM Hours Protection Parameter List
Parameter
Number
Parameter
Name
(1)
(1) As displayed on the HIM or Connected Components Workbench configuration tools.
Minimum/Maximum Value Default Value Access Units
126 PM Hours 1…10000 10000 R/W HRS
21 Time to PM 0.0…10000.00 0.0 R HRS
16 Meter Reset
Ready, Elapsed Time, Energy, Time to
PM, Starts to PM
Ready R/W —
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