Control functions
7.8 Communicating with the PLC
SINAMICS V90, SIMOTICS S-1FL6
264 Operating Instructions, 04/2019, A5E36037884-007
Communicating with the PLC
The SINAMICS V90 supports communication with the PLC on the RS485 interface. You can
parameterize whether the RS485 interface applies USS or Modbus RTU protocol. USS is the
default bus setting. A shielded twisted pair cable is recommended for RS485 communication.
The SINAMICS V90 can communicate with the PLC through an RS485 cable with the
standard USS communication protocol. After the communication is established, you can
change the position setpoint and speed setpoint through the USS communication protocol.
The servo drive can also transmit the actual speed, torque, and alarm to the PLC through the
USS communication protocol.
The telegram format is shown as follows:
: start of text
: length
: slave address
: parameter ID
: sub-index
: parameter value
BCC: block check character
You can access the following parameters by USS.
p1001 Fixed speed setpoint 1 r0020 Speed setpoint smoothed
Absolute actual current smoothed
Active power actual value smoothed
Motor utilization thermal
Speed of fixed position setpoint
p2572 IPos maximum acceleration r2556 LR position setpoint after setpoint
IPos maximum deceleration
To Next Page
Loading...
Need help?
General
