Motorized Potentiometer As Setpoint Source - Siemens SINAMICS G120 CU230P-2 HVAC Operating Instructions Manual

Functions
7.4 Setpoint sources
7.4.2

Motorized potentiometer as setpoint source

The 'motorized potentiometer' (MOP) function simulates an electromechanical potentiometer
for entering setpoints. You can continuously adjust the motorized potentiometer (MOP) using
the control signals "raise" and "lower". The control signals are received via the digital inputs
of the inverter or from the operator panel that has been inserted.
Typical applications
● Entering the speed setpoint during the commissioning phase.
● Manual operation of the motor should the higher-level control fail.
● Entering the speed setpoint after changeover from automatic operation to manual
● Applications with largely constant setpoint and without higher-level control.
Principle of operation
Figure 7-9
Motorized potentiometer parameters
Table 7- 16
Parameter
p1047
p1048
p1040
196
operation.
Function chart of motorized potentiometer
Basic setup of motorized potentiometer
Description
MOP ramp-up time (factory setting 10 s)
MOP ramp-down time (factory setting 10 s)
Start value of MOP (factory setting 0 rpm)
Determines the start value [rpm] that becomes effective when the motor is switched
on
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD