Rockwell Automation MV SMC Flex Motor Controller (for Series K or later) - Manual (Page 94)

84 Rockwell Automation Publication 1560E-UM051F-EN-P - June 2013
Chapter 4 Programming
Motor Protection While the Basic Setup group allows the user to get started with a minimum
number of parameters to modify, the Motor Protection group allows full access
to the SMC Flex controller’s powerful parameter set. Following is a listing of the
additional setup parameters provided.
TIP The majority of parameters have a Fault and an Alarm setting.
Parameter Option
Overload
Allows the user to select the operation of the overload. Trip Class, Service Factor, Motor FLC, Overload Reset,
Overload Alarm Level
Underload
(1) (2)
Determines the trip level as a percentage of the motor’s
FLA, and the delay period.
(1) The delay time must be set to a value greater than zero when Undervoltage, Overvoltage and Unbalance are enabled.
(2) For Jam and Underload detection to function, the Motor FLC must be programmed in the Motor Protection group. See
Motor
Information on page 86 .
Underload Fault Level,
Underload Fault Delay,
Underload Alarm Level,
Underload Alarm Delay
Undervoltage (1)
Determines the trip level as a percentage of line voltage
and delay period.
Undervoltage Fault Level,
Undervoltage Fault Delay,
Undervoltage Alarm Level,
Undervoltage Alarm Delay
Overvoltage
(1)
Determines the trip level as a percentage of line voltage
and delay period.
Overvoltage Fault Level,
Overvoltage Fault Delay,
Overvoltage Alarm Level,
Overvoltage Alarm Delay
Unbalance
(1)
Allows the user to set the current unbalance trip level and
delay period.
Unbalance Fault Level,
Unbalance Fault Delay,
Unbalance Alarm Level,
Unbalance Alarm Delay
Jam (1) (2)
Determines the trip level as a percentage of motor full
load current and delay period.
Jam Fault Level,
Jam Fault Delay,
Jam Alarm Level,
Jam Alarm Delay
Stall
Allows the user to set the stall delay time. Stall Delay
Ground Fault
(3)
Allows the user to enable the ground fault level in amps,
delay time and inhibit time. A separate core balance
current transformer is required.
(3) See details in Ground Fault on page 12 .
Ground Fault Enable,
Ground Fault Level,
Ground Fault Delay,
Ground Fault Inhibit Time,
Ground Fault Alarm Enable,
Ground Fault Alarm Level,
Ground Fault Alarm Delay
PTC
(4)
Allows the user to connect a PTC to the SMC and enable a
fault when it becomes active.
(4) See details in Thermistor/PTC Protection on page 13 .
PTC Enable
Phase Reversal
Determines the proper orientation of line connections to
the SMC. If Enabled and phases are out of sequence, a
fault will be indicated. Phase Reversal
Restarts
Allows the user to determine the maximum number of
restarts per hour the unit can experience, and delay time
between consecutive starts. Restarts Per Hour,
Restart Attempts,
Restart Delay