FM100 Parameters

The FM100 variable frequency drive is partly programmable. There are more than a hundred parameters that you can set from the front panel (or from a serial line, if you want to hook up a computer). Here are the few parameters (which Teco-Westinghouse calls "functions") that we changed from the factory defaults.

Function Description Setting Notes
001 Acceleration Time 5 sec Shortest acceleration time that keeps the startup current under 15 amps (any more than this might trip the overcurrent breaker in the RL125, if sustained for too long).
002 Deceleration Time 5 sec The default 10 seconds seems very slow. Could shorten this until we really warm up the braking transistor, but 5 seconds works well enough.
003 Start/Stop from TM2 0001 Remote control will simply run the dust collector in the "forward" direction, or stop it. (Many combinations of run/stop and forward/reverse are available.)
005 V/Hz Pattern 0 General-purpose starting torque; simple ramp up to full voltage at 50Hz. (Might want to experiment with changing this to a variable-torque setting.)
010 Start/Stop Control 1 Permit the remote control to start and stop the dust collector by operating a relay connected to terminals on the TM2 terminal strip.
011 Frequency Command Selection 1 Use the front-panel potentiometer to set the maximum frequency.
044 Stopping Mode 0010 Decelerate to a stop (rather than coasting), and enable braking resistor overheat protection.
047 Meter Display Mode 0111 Enable display of output voltage, bus voltage, and output current.
069 Electronic Overload Protection 0100 Motor overload protection should permit continuous running at 113% of rated current, or up to 60 seconds running at 123% of rated current. This is tailored for a "fan-type" load.
070 Motor Rated Current 11.6 amps The RL125 motor plate shows an 11.6A rating.
077 Overtorque Control 0111 Enable overtorque detection during motor operation, and coast to a stop if an overtorque condition occurs.
078 Overtorque Detection Level 100% Overtorque condition occurs if the output current exceeds the motor's rating. (This is pretty conservative, but it works, and it eliminates the need to disconnect the 15A overcurrent breaker in the RL125 itself.)

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