Chapter 9
Diagnostics
Overview This chapter describes the fault diagnostics of the MV Dialog Plus™
controller. Further, this section describes the conditions that cause
various faults to occur.
Protection Programming
Many of the protective features available with the SMC Dialog Plus
controller can be enabled and adjusted through the programming parameters
provided. For further details on programming, refer to the Advanced Setup
section in Chapter 4, Programming.
Fault Display The SMC Dialog Plus controller comes equipped with a built-in, two-line,
16-character LCD. The LCD displays the fault message on the first line
and the fault code on the second line.
OVERLOAD
F7
Figure 9.1 – Fault Display
Note: The fault display will remain active as long as control power is
applied. If control power is cycled, the fault will be cleared, the
controller will re-initialize, and the display will show a status of
"Stopped".
Clear Fault Important: Resetting a fault will not correct the cause of the fault condition.
Corrective action must be taken before resetting the fault.
You can clear a fault using any of several methods:
• Program the SMC Dialog Plus controller for a Clear Fault, which can
be found in the Faults and Linear List groups.
• If a human interface module is connected to the controller, press the
Stop button.
Note: The stop signal will not clear a fault if Control Logic is disabled
(Logic Mask, parameter #85, equals ø).
• Cycle control power to the SMC Dialog Plus controller.
Note: Communications faults cannot be cleared via this method.
Important: An overload fault cannot be reset until the Motor Thermal
Usage (parameter 11) value is below 75%. See page 1-6 for further details.
1560D-UM051D-EN-P – February 2005
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