Position Actual Value Of The Encoder - Siemens SINAMICS G120 Operating Instructions Manual
Low voltage inverters
built-in units with cu250s-2 control units and
encoder evaluation
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Also See for SINAMICS G120:
- List manual (1256 pages) ,
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Advanced commissioning
6.5 Drive control via PROFIBUS or PROFINET
6.5.8
Position actual value of the encoder
G1_XIST1 and G2_XIST1
In the factory setting, the inverter transfers the encoder position actual value with a fine
resolution of 11 bits to the higher-level control system.
Figure 6-17
The transferred encoder signal has the following properties:
● After the inverter power supply has been switched on, the encoder signal = 0.
● The higher-level control must be able to handle a counter overflow of the encoder signal.
G1_XIST2 and G2_XIST2
In G1_XIST2 or G2_XIST2, the inverter transfers different values to the higher-level control
system:
Encoder x parked
Encoder fault x
Referencing encoder x
Figure 6-18
The inverter transfers the position values in the same format (encoder pulse number and fine
resolution) the same as G1_XIST1 and G2_XIST1.
Table 6-24
No.
1
2
196
G1_XIST1 and G2_XIST1
Gx_ZSW.14 = 1
Gx_ZSW.15 = 1
Gx_ZSW.4 = 1 or Gx_ZSW.5 = 1 or Gx_ZSW.6 = 1 or Gx_ZSW.7 = 1
G1_XIST2 and G2_XIST2
Fault code
Explanation
Encoder fault
Zero-mark monitoring
Possible cause
One or more encoder faults.
Observe the inverter message.
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Converter with the CU250S-2 Control Units
Operating Instructions, 04/2018, FW V4.7 SP10, A5E31759476B AG
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