get_modbus_input(iobus)
Features
This function reads the signal from the Modbus Slave unit. Parameters
Parameters
| Parameter Name | Data Type | Default Value | Description |
|---|---|---|---|
iobus | string | - | Modbus name (set in the TP) |
Note
When registered as a multiple signal, it is available by adding address value index to signal name.
Return
Value | Description |
0 or 1 or value | Modbus Descrete / Coil Register: ON or OFF Modbus Input / Holding Register : Register value |
Exception
| Exception | Description |
|---|---|
DR_Error (DR_ERROR_TYPE) | Parameter data type error occurred |
DR_Error (DR_ERROR_VALUE) | Parameter value is invalid |
DR_Error (DR_ERROR_RUNTIME) | C extension module error occurred |
DR_Error (DR_ERROR_STOP) | Program terminated forcefully |
Example
PY
#Modbus digital I/O is connected, and the signals are registered as "di1" and "di2".
get_modbus_input("di1")
get_modbus_input("di2")
#Modbus analog I/O is connected, and the signals are registered as "reg1" and "reg2".
get_modbus_input("reg1")
get_modbus_input("reg2")
#Modbus multiple signal is registered as “multi”(start address=10, cnt=2).
#“multi_10” & “multi_11” abailable
get_modbus_ input ("multi_10")
get_modbus_ input ("multi_11")