Siemens SINAMICS G120P - Position Actual Value of the Encoder

Communication via PROFIBUS and PROFINET
3.1 PROFIDRIVE profile - Cyclic communication
Fieldbuses
Function Manual, 04/2018, FW V4.7 SP10, A5E34229197B AE
31
3.1.4
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 3-13 G1_XIST1 and G2_XIST1
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
Gx_ZSW.14 = 1
Encoder fault x
Gx_ZSW.15 = 1
Referencing encoder x
Gx_ZSW.4 = 1 or Gx_ZSW.5 = 1 or Gx_ZSW.6 = 1 or Gx_ZSW.7 = 1
Figure 3-14 G1_XIST2 and G2_XIST2