Blocks MODBUS Slave

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Slave MODE

MODBUS_GET_COIL

Reads the appropriate COIL value from the internal modbus table of values.

in	OfsAdr	word		register address (1-9999)
out	ERR	bool		F = No error, T = occur any error
out	ERR_ID	word		Error ID - see Error table
out	Q	bool		return value
out	R_TRIG	bool		for future use - not implemented
out	W_TRIG	bool		for future use - not implemented

Example: Modbus Master device or software controls 'led_usr1_red' on the IPLOG.

MODBUS_GET_DISCRETE

Reads the appropriate DISCRETE value from the internal modbus table of values.

in	OfsAdr	word		register address (1-9999)
out	ERR	bool		F = No error, T = occur any error
out	ERR_ID	word		Error ID - see Error table
out	Q	bool		return value
out	R_TRIG	bool		for future use - not implemented
out	W_TRIG	bool		for future use - not implemented

MODBUS_GET_HOLDING

Reads the appropriate HOLDING register value from the internal modbus table of values.

in	OfsAdr	word		register address (1-9999)
out	ERR	bool		F = No error, T = occur any error
out	ERR_ID	word		Error ID - see Error table
out	Q	word		return value
out	R_TRIG	bool		for future use - not implemented
out	W_TRIG	bool		for future use - not implemented

MODBUS_GET_INPUT

Reads the appropriate INPUT register value from the internal modbus table of values.

in	OfsAdr	word		register address (1-9999)
out	ERR	bool		F = No error, T = occur any error
out	ERR_ID	word		Error ID - see Error table
out	Q	word		return value
out	R_TRIG	bool		for future use - not implemented
out	W_TRIG	bool		for future use - not implemented

MODBUS_SET_COIL

Writes the appropriate COIL value to the internal modbus table of values.

in	OfsAdr	word		register address (1-9999)
in	VAL	bool		value to write
out	ERR	bool		F = No error, T = occur any error
out	ERR_ID	word		Error ID - see Error table

MODBUS_SET_DISCRETE

Writes the appropriate DISCRETE value to the internal modbus table of values.

in	OfsAdr	word		register address (1-9999)
in	VAL	bool		value to write
out	ERR	bool		F = No error, T = occur any error
out	ERR_ID	word		Error ID - see Error table

MODBUS_SET_HOLDING

Writes the appropriate HOLDING register value to the internal modbus table of values.

in	OfsAdr	word		register address (1-9999)
in	VAL	word		value to write
out	ERR	bool		F = No error, T = occur any error
out	ERR_ID	word		Error ID - see Error table

MODBUS_SET_INPUT

Writes the appropriate INPUT register value to the internal modbus table of values.

in	OfsAdr	word		register address (1-9999)
in	VAL	word		value to write
out	ERR	bool		F = No error, T = occur any error
out	ERR_ID	word		Error ID - see Error table

Example: Value from "resin1" is saved in register 2 of Input register.

MODBUS_TCP_SLAVE

This function block starts listening TCP MODBUS slave deamon on the appropriate port.

in	Port	int		Listening TCP port (default: 502)
in	UnitID	byte		device bus address (1-247) (default: 1)
out	ERR	bool		F = No error, T = occur any error
out	ERR_ID	word		Error ID - see Error table