get_modbus_inputs_list(iobus_list)
Features
It is the command for reading multiple register type open signals from an external Modbus Slave unit.
Parameter
| Parameter Name | Data Type | Default Value | Description |
|---|---|---|---|
iobus_list | list(string) | - | Modbus input name list (configured at TP) Available only with the following signal types
|
Return
| Value | Description |
|---|---|
res | Number values read |
val_list | List of multiple signal values read simultaneously |
Exception
| Exception | Description |
|---|---|
DR_Error (DR_ERROR_TYPE) | Parameter data 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 Register I/O "Holding1" is 1234, "Input1" is 567,
# and "Holding2" is 9876
res, val_list = get_modbus_inputs_list(iobus_list=[ "Holding1", "Input1", "Holding2"])
#res expected value = 3
#val_list expected value = [1234, 567, 9876]