Analog Inputs - Siemens SINAMICS G120 Operating Instructions Manual

7.4

Analog inputs

Analog input terminals
Define the analog input type
The inverter offers a series of default settings, which you can select using parameter p0756:
Unipolar voltage input
Unipolar voltage input monitored
Unipolar current input
Unipolar current input monitored
Bipolar voltage input
No sensor connected
In addition, you must also set the switch belonging to the analog input. You
can find the switch on the Control Unit behind the lower front doors.
 Voltage input: Switch position U (factory setting)
 Current input: Switch position I
If you change the analog input type using p0756, then the inverter automatically selects the
appropriate scaling of the analog input. The linear scaling characteristic is defined using two
points (p0757, p0758) and (p0759, p0760). Parameters p0757 ... p0760 are assigned to an
analog input via their index, e.g. parameters p0757[0] ... p0760[0] belong to analog input 0.
Figure 7-3
SINAMICS G120C frequency converter
Operating Instructions, 03/2012, FW V4.5, A5E02999804B AB
p0756[0]
r0755[0]
Examples for scaling characteristics
Changing the function of the analog input
1. Define the analog input type using
parameter p0756 and the switch on the
CI: pyyyy
inverter (e.g. voltage input -10 V ... 10 V or
current input 4 mA ... 20 mA).
2. Interconnect parameter p0755 with a
connector input of your choice (e.g. as
speed setpoint).
Connector inputs are designated with "CI" in
the parameter list of the List Manual.
0 V ... +10 V
+2 V ... +10 V
0 mA ... +20 mA
+4 mA ... +20 mA
-10 V ... +10 V
Adapting the terminal strip
7.4 Analog inputs
p0756[0] = 0
1
2
3
4
8
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