Control Voltage Limiting - Siemens SINAMICS S120 System Manual

Drive functions
5.5 Control voltage output
5.5.3

Control voltage limiting

You can limit the control voltage using the following parameters:
● Control voltage limiting positive (p1850)
The manipulated variable setpoint is limited in the positive direction to the value set in
p1850 before D/A conversion. A message is sent to the PLC if the limit is violated.
● Control voltage limiting negative (p1851)
The manipulated variable setpoint is limited in the negative direction to the value set in
p1851 before D/A conversion. A message is sent to the PLC if the limit is violated.
Manipulated variable inversion
The voltage output (manipulated variable) can be inverted in machine data p1820 in order to
compensate for differences in sign in the piping or wiring. Alternatively, the wiring of the
manipulated variable for the valve could be altered.
Definition of direction: see Chapter "Control sense, traversing direction (Page 106)"
Overview of important parameters (see SINAMICS S120/S150 List Manual)
• p1820[0...n]
• p1850[0...n]
• p1851[0...n]
178
Invert output voltage
Control voltage limiting positive
Control voltage limiting negative
System Manual, 04/2015, 6SL3097-4BA00-0BP1
Hydraulic Drive