ABB Baldor BC201 - Trimpot Adjustments: Speed, Response, TCL; Operation Modes

2-12
MN716
Maximum Speed (MAX)
The MAX trimpot is used to set the maximum output voltage of the control which, in turn, sets the
maximum speed of the motor. In the Torque Control Mode, the MAX trimpot setting determines the
unloaded motor speed.
Adjust the MAX trimpot as follows:
a. Rotate Main Speed potentiometer to full speed (CW).
b. Adjust MAX trimpot to desired maximum motor speed.
Note: Do not exceed maximum rated RPM of motor since unstable operation may result.
Response (RESP)
This trimpot determines the dynamic response of the control. The factory setting is approximately
50% of full rotation. The setting may be increased if a faster response is required.
Note: If response is made too fast, unstable operation may result.
Timed Current Limit (TCL) Trimpot
Trimpot is used only when control is connected for 3-wire Start/Stop and J6 is in the TCL position.
The TCL trimpot sets the delay time for the Timed Current Limit. The trimpot is adjustable over a time
range of 1·15 seconds and is factory set for approximately 5 seconds. See Table 2-7.
Calibrate the TCL trimpot by setting the trimpot to the approximate desired delay time.
Table 2-7 Current Limit Timer Settings
Approximate Trip Time (Seconds) Trimpot Position
1 Full CCW
8 Midway
15 Full CW
Operation
The input voltage can be derived from the wiper of the main speed potentiometer or from an isolated
analog input (voltage following mode). Since the BC200/BC201 are 4-quadrant regenerative drives,
the motor speed will follow both a positive and negative wiper voltage and drive the motor in both the
forward direction and reverse direction. In addition, it will apply both forward and reverse torque to
stabilize motor speed.
The BC200/BC201 can be operated as speed control or torque control by setting the position of
jumper J7. The main speed potentiometer controls the magnitude of the mode selected.
Set jumper J7 to SPD for speed control or to TRQ for torque control.
Speed or Torque Control
When jumper J7 is set to the SPD position, motor speed is a function of the voltage on input terminals
12 (signal) and 13 (common).
Note: When J7 is set for speed control (SPD), J8 must be set to S/L position (factory setting).
Table 2-8 Summary of Control (REGEN) Operation
Quadrant Type of
Operation
Motor Rotation
Direction
Motor Torque
Direction
Applied Load
Direction
I Motoring CW CW CCW
II Regeneration CCW CW CCW
III Motoring CCW CCW CW
IV Regeneration CW CCW CW
StockCheck.com
Downloaded from StockCheck.com