Siemens SINAMICS V90 Operating Instructions Manual page 199

Main step
⑤
Select a communication protocol with p29007.
⑥
Configure the parameters for selected commu-
nication protocol.
⑦
Save the parameters and restart the drive.
⑧
Start transmitting.
⑨
Transmit the calibration status of the absolute
encoder to the PLC.
⑩
Transmit the absolute position data to the PLC.
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 07/2015, 6SL3298-0AV60-0BP0
Sub step/comment
Set value for p29007.
0: no protocol
•
1: USS protocol
•
2: Modbus protocol
•
1. Set RS485 address (p29004).
2. Set baud rate (p29009).
3. Set the command and setpoint source if you use Modbus proto-
col (p29008).
1. Turn on the servo-on enable signal (SON).
2. The PLC checks the standstill status and alarm status through
the digital output of the servo drive.
3. If there is no alarm and the motor is in standstill status, the PLC
sends a data request to the servo drive through the RS485 cable.
4. In response to the data request from PLC, the servo drive trans-
mits calibration status (p2507[0]=3) of encoder to the PLC.
1. If the absolute encoder is calibrated, and meanwhile, the servo
drive is ready (the digital output RDY is logic 1) and in standstill
status (the digital output signal INP is logic 1), the PLC sends a
data request to drive through the RS485 cable.
2. In response to the data request from the PLC, the servo drive
transmits the absolute position data (r2521) to the PLC.
Control functions
7.8 Absolute position system
199