Rockwell Automation 150 USE MN/SMC DIALOG + CONTROLLER - Manual (Page 148)

Diagnostics 9-5
Open Gate
Open gate indicates that an abnormal condition that causes faulty
firing (i.e., open SCR gate) has been sensed during the start sequence.
The SMC Dialog Plus controller will attempt to start the motor a total
of three times before the controller shuts down.
Excess Starts/Hour
Excess starts/hour is displayed when the number of starts in a one
hour period exceeds the value programmed.
Controller Temp
Controller temp is an indication that a power pole’s maximum rated
temperature has been reached. The controller’s microprocessor
monitors the temperature of the SCRs by using internal thermistors.
When the controller detects an overtemperature condition, the
microprocessor turns off the SCRs and displays the appropriate fault
code.
An overtemperature condition could indicate the presence of
inadequate ventilation, high ambient temperature, overloading, or
excessive cycling.
If an overtemperature condition exists at start-up, the SCR gate
signals will be inhibited and the controller will trip and indicate the
fault. The fault can be immediately reset. However, the motor cannot
be restarted until after the controller temperature falls below trip
levels.
Comm Fault
The SMC Dialog Plus controller disables control through the serial
communication port as the factory default. To enable control, the
Logic Mask parameter (#85) found in the Linear List programming
group must be set to “4.” With Series B human interface modules,
this can also be accomplished by enabling control logic through the
Control Status programming group.
If a Bulletin 1201 human interface module or Bulletin 1203
communication module is disconnected from the SMC Dialog Plus
controller when control is enabled, a Comm Fault will occur.