add_modbus_signal(ip, port, name, reg_type, index, value=0, slaveid=255)
Features
This function registers the ModbusTCP signal. The Modbus I/O must be set in the Teach Pendant I/O set-up menu. Use this command only for testing if it is difficult to use the Teach Pendant. The Modbus menu is disabled in the Teach Pendant if it is set using this command.
Parameters
| Parameter Name | Data Type | Default Value | Description |
|---|---|---|---|
ip | string | - | IP address of the ModbusTCP module |
port | int | - | Port number of the ModbusTCP module |
name | string | - | Modbus signal name |
reg_type | int | - | Modbus signal type
|
index | int | - | Modbus signal index |
value | int | 0 | Output when the type is DR_COIL or DR_HOLDING_REGISTER (ignored otherwise) |
slaveid | int | 255 |
0 : Broadcase address 255 : Default value for ModbusTCP |
Return
| Value | Description |
|---|---|
0 | Success |
Negative value | 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
# An example of connecting two Modbus IO and allocating the contacts
# Modbus IO 1 : IP address 192.168.137.254, port 502
Input Register Address 0 ~ 3, signal name “input1”~”input4”
Holding Register Addreess 0 ~ 3, signal name “output1”~”output4”
# Modbus IO 2 : IP address 192.168.137.253, port 502
Input Register Address 0 ~ 3, signal name “input1”~”input4”
Holding Register Addreess 0 ~ 3, signal name “output1”~”output4”
# set < Modbus IO 1 > “input1”~”input4”, “output1”~”output4”
add_modbus_signal(ip="192.168.137.254",port=502, name="input1", reg_type=DR_INPUT_REGISTER, index=0, slaveid=255)
add_modbus_signal(ip="192.168.137.254",port=502, name="input2", reg_type=DR_INPUT_REGISTER, index=1, slaveid=255)
add_modbus_signal(ip="192.168.137.254",port=502, name="input3", reg_type=DR_INPUT_REGISTER, index=2, slaveid=255)
add_modbus_signal(ip="192.168.137.254",port=502, name="input4", reg_type=DR_INPUT_REGISTER, index=3, slaveid=255)
add_modbus_signal(ip="192.168.137.254",port=502, name="output1", reg_type=DR_HOLDING_REGISTER, index=0, value=0, slaveid=255)
add_modbus_signal(ip="192.168.137.254",port=502, name=" output2", reg_type=DR_HOLDING_REGISTER, index=1, value=0, slaveid=255)
add_modbus_signal(ip="192.168.137.254",port=502, name=" output3", reg_type=DR_HOLDING_REGISTER, index=2, value=0, slaveid=255)
add_modbus_signal(ip="192.168.137.254",port=502, name=" output4", reg_type=DR_HOLDING_REGISTER, index=3, value=0, slaveid=255)
# set < Modbus IO 1 > “input5”~”input8”, “output5”~”output8”
add_modbus_signal(ip="192.168.137.253",port=502, name="input5",
reg_type= DR_INPUT_REGISTER, index=0, slaveid=255)
add_modbus_signal(ip="192.168.137.253",port=502, name=" input6",
reg_type= DR_INPUT_REGISTER, index=1, slaveid=255)
add_modbus_signal(ip="192.168.137.253",port=502, name=" input7",
reg_type= DR_INPUT_REGISTER, index=2, slaveid=255)
add_modbus_signal(ip="192.168.137.253",port=502, name=" input8",
reg_type= DR_INPUT_REGISTER, index=3, slaveid=255)
add_modbus_signal(ip="192.168.137.253",port=502, name=" output5", reg_type=DR_HOLDING_REGISTER, index=0, value=0, slaveid=255)
add_modbus_signal(ip="192.168.137.253",port=502, name=" output6", reg_type=DR_HOLDING_REGISTER, index=1, value=0, slaveid=255)
add_modbus_signal(ip="192.168.137.253",port=502, name=" output7", reg_type=DR_HOLDING_REGISTER, index=2, value=0, slaveid=255)
add_modbus_signal(ip="192.168.137.253",port=502, name=" output8", reg_type=DR_HOLDING_REGISTER, index=3, value=0, slaveid=255)