
Operation
6.5 Setpoint sources
Drive converter cabinet units
Operating Instructions, 07/07, A5E00288214A
197
6.5.2
Motorized potentiometer
Description
The digital motorized potentiometer enables you to set speeds remotely using switching
signals (+/- keys). It is activated via terminals or PROFIBUS. As long as a logical 1 is present
at signal input "MOP raise" (setpoint higher), the internal numerator integrates the setpoint.
You can set the integration time (time taken for the setpoint to increase) using parameter
p1047. In the same way, you can decrease the setpoint using signal input "MOP lower". The
deceleration ramp can be set using parameter p1048.
Configuration parameter p1030.0 = 1 (default setting = 0) is used to activate that the actual
motorized potentiometer is saved in a non-volatile fashion when powering-down the drive
unit. When powering-up the drive unit, the starting (initial) value of the motorized
potentiometer is set to the last, actual value that was present when the drive unit was
powered-down.
Prerequisites
The default setting for the motorized potentiometer was chosen during commissioning:
•
STARTER:
"Motorized potentiometer"
•
AOP30:
"3: Motorized potentiometer"
Signal flow diagram
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Figure 6-18 Signal flow diagram: Motorized potentiometer
Function diagram
FD 3020
Motorized potentiometer