Definition
get_modbus_inputs(iobus_list)
Features
This function reads multiple signals from the Modbus Slave unit.
Parameters
|
Parameter Name |
Data Type |
Default Value |
Description |
|---|---|---|---|
|
iobus_list |
list(string) |
- |
Modbus input name list (set in the TP) signal type can be used only in the following cases
|
Return
|
Value |
Description |
|---|---|
|
int (>=0) |
Multiple signals to be read at once (the value of the combination of iobus_list where the first value is LSB and the last value is MSB)
|
|
Negative number |
Failed |
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
# Modbus digital I/O input signal "di1" =OFF, "di2"=ON, and "di3" =ON
res = get_modbus_inputs(iobus_list=["di1", "di2", "di3"])
#res expected value = 0b110 (binary number), 6 (decimal number), or 0x06 (hexadecimal number)
# Modbus digital I I/O input signal "di4" OFF and "di5" ON
res = get_modbus_inputs(["di4", "di5"])
#res expected value = 0b10 (binary number), 2 (decimal number), or 0x02 (hexadecimal number)
Keyword
get_ / modbus / get_modbus / modbus_inputs