Siemens SINAMICS V90 Operating Manual page 146

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DI simulation
The digital input signals can be simulated by Modbus with registers 40281 and 40283.
Digital input
Register
40281 (p0795)
Register
40283 (p0796)
● Set the simulation mode for DIs with register 40281
Bit 0 to bit 9 of register 40281 can be used to set the simulation mode for DI1 to DI 10.
For example, if you want to simulate DI1 with Modbus, you need to set bit 0 = 1 for
register 40281.
● Set the setpoint for DIs with register 40283
Bit 0 to bit 9 of register 40283 can be used to set the setpoint for the simulated DI signals.
After the DI simulation mode is set, you can set the setpoint for a DI signal with register
40283 to enable the DI signal. For example, if you have set bit 0 = 1 for register 40281, to
enable signal DI1, you need to set the trigger condition (rising edge or high level) for bit 0
of register 40283.
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, see Section "Digital inputs/outputs (DIs/Dos)
(Page 94)".
● 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.
146
DI1 DI2 DI3
Bit 0 Bit 1 Bit 2
Bit 0 Bit 1 Bit 2
DI1 DI2 DI3
SON REST CWL
Bit 0 Bit 1 Bit 2
Bit 0 Bit 1 Bit 2
DI4 DI5 DI6
Bit 3 Bit 4 Bit 5
Bit 3 Bit 4 Bit 5
DI4 DI5 DI6
CCWL CWE CCWE SPD1
Bit 3 Bit 4 Bit 5
Bit 3 Bit 4 Bit 5
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Operating Manual, 04/2017, A5E36618042-003
DI7 DI8 DI9
Bit 6 Bit 7 Bit 8
Bit 6 Bit 7 Bit 8
DI7 DI8 DI9
SPD2 EMGS C-
Bit 6 Bit 7 Bit 8
Bit 6 Bit 7 Bit 8
DI10
Bit 9
Bit 9
DI10
MODE
Bit 9
Bit 9