Acyclic Communication - Siemens SINAMICS V90 Operating Instructions Manual

Control functions
7.7 Communicating with the PLC
DI simulation example in S control mode
In S control mode, the default digital input signal assignment is as follows:
Digital input
Signal
Register
40281 (p0795)
Register
40283 (p0796)
For more information about the DI assignment, refer to "Digital inputs/outputs (DIs/DOs)
(Page 89)".
● Set the simulation mode for DI1
To simulate DI1 with Modbus, you need to set bit 0 = 1 for register 40281.
● Set the setpoint for DI1
After the simulation mode of DI1 is set, you can set the setpoint for DI1 with register
40283 to enable the DI signal.
In S control mode, DI1 is assigned with SON by default, so we need to trigger a rising
edge to enable the SON signal. Set bit 0 = 0 for register 40283 and then set the bit to 1. A
rising edge is triggered. The motor is now in "S ON" state.
7.7.2.3

Acyclic communication

The SINAMICS V90 servo drive supports acyclic communication via data set 47.
The maximum data length per request is 240 bytes.
Note
Values in italics
Values in italics in the following tables mean that you have to adjust these values for a
specific request.
224
DI1 DI2 DI3
SON REST CWL
Bit 0 Bit 1 Bit 2
Bit 0 Bit 1 Bit 2
DI4 DI5 DI6
CCWL CWE CCWE SPD1
Bit 3 Bit 4 Bit 5
Bit 3 Bit 4 Bit 5
Operating Instructions, 09/2016, A5E36037884-002
DI7 DI8 DI9
SPD2 EMGS C-
Bit 6 Bit 7 Bit 8
Bit 6 Bit 7 Bit 8
SINAMICS V90, SIMOTICS S-1FL6
DI10
MODE
Bit 9
Bit 9