CDRFLEx.add_modbus_signal

Features

This is a function for using the Modbus I/O signal by registering it in advance. The modbus I/O signal registered using this function should be reset after rebooting, as it is stored in the memory. However, if it is registered in the T/P application, it can be reused, as it is added in the initialization process.

Parameter

Parameter Name	Data Type	Default Value	Description
strSymbol	string	-	modbus signal Name
strIpAddress	string	-	modbus module ip address
nPort	unsigned short	-	modbus module port
eRegType	enum	-	Refer to the Definition of Constant and Enumeration Type
iRegIndex	unsigned short	-	Index of Modbus signal
nRegValue	unsigned short	0	Output value when type is MODBUS_REGISTER_TYPE_COILS or MODBUS_REGISTER_TYPE_HOLDING_REGISTER (ignored in other cases)

Return

Value	Description
0	Error
1	Success

Example

PY

/*
Example of connecting Modbus IO and allocating contact point 
Modbus IO IP: 192.168.127.254
input 2 points: “di1”,”di2”
*/

// set <modbus> input : “di1”, “di2” 
drfl.add_modbus_signal("di1", "192.168.127.254" , 502, MODBUS_REGISTER_TYPE_DISCRETE_INPUTS, 0, 0);

drfl.add_modbus_signal("di2", "192.168.127.254" , 502, MODBUS_REGISTER_TYPE_DISCRETE_INPUTS, 0, 0);