34 Rockwell Automation Publication 1560F-UM001A-EN-P - June 2019
Chapter 1 Product Overview
• Motor Speed—The SMC-50 control module provides a calculated
estimate of motor speed in percent of full speed when operating in the
linear speed acceleration starting or deceleration stopping mode.
• Elapsed Time and Elapsed Time 2—An elapsed time meter is provided to
account for the total accumulated hours the motor has been running. You
can reset the meter. Elapsed Time 2 cannot be user reset and holds after
50,000 hours have elapsed.
• Running Time—The running time meter accumulates time (in hours)
from the point the motor start command is given up to the point the
motor stop command is issued. When a new start command is given, the
meter resets to zero and begins accumulating time again.
• Actual Start Time—The unit stores the actual time it takes to complete a
start cycle (motor start command issued until motor is up-to speed). The
last five start times are stored as parameters for user access and in the Alarm
Buffer as events.
• Total Starts—The total starts counter increments on every successful start
(no prestart fault occurred) and cannot be reset. The maximum value is
65,635.
For the torque parameter to display correctly, the motor value for Rated Torque,
Parameter 47, and Rated Speed, Parameter 48, must be correctly configured.
The Motor Speed meter parameter is only valid when using the Linear Speed
Starting or Linear Speed Stopping modes. It provides the estimated motor speed
during either the starting or stopping maneuver. When the SMC-50 control
module is not in these modes, the Motor Speed meter parameter reads zero
except when the unit is at speed. In this case, the parameter displays 100%.
The Elapsed Time meter value is updated every 10 minutes and stored at power
down (accurate to 1/6 of an hour). The Elapsed Time meter accumulates to
50,000 hours of operation and can be reset to zero via the Meter Reset parameter.
Motor thermal capacity usage is determined by the built-in electronic thermal
overload. An overload fault occurs when this value reaches 100%.
Inputs and Outputs
The SMC-50 control module has the ability to accept up to two (2) inputs and
two (2) outputs controlled over a network. The two inputs are +24V DC rated
(Input #1, terminal 10 and Input #2, terminal 11). Input #1 is used for the
Emergency Run function. Input #2 is available and a contact could be inserted
between terminal 12 and terminal 11 to realize certain function as expected. For
these two inputs, see Chapter 4
for the parameter settings and Chapter 7 for bit
identification.
The two outputs are Aux #1 and Aux #2. Aux #1 is programed to be ‘Ext. Bypass’
Aux #2 is programmed to be ‘Normal’ all the time.
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