Definition
get_modbus_input(iobus)
Features
This function reads the signal from the Modbus Slave unit.
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
Python
#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")
Keyword
get_ / modbus / get_modbus / modbus_input