ModRtuMast (FB)

FUNCTION_BLOCK ModRtuMast EXTENDS ModRtuMastBase

Function Block serves to send Modbus RTU requests to a server and evaluate the response

InOut:

Scope	Name	Type	Initial	Comment	Inherited from
Input	Endian	CAA.ENDIANESS	CAA.ENDIANESS.BIG	Select the endianes / byte order of data formatted as WORD	ModRtuMastBase
	Serv	BYTE	0	Address of the remote Modbus RTU Server device (0 = broadcast)	ModRtuMastBase
	Fct	BYTE	0	Function Code as specified in Modbus Protocol Specification	ModRtuMastBase
	Timeout	WORD	2000	Wait for server’s response up to Timeout milliseconds	ModRtuMastBase
	Addr	WORD	0	Operand/Register address in remote Modbus RTU Server device	ModRtuMastBase
	Nb	WORD	0	Amount of data units to be sent/received	ModRtuMastBase
	Data	DWORD	0	Address of local buffer for data to be sent or received	ModRtuMastBase
Output	ErrorID	ERROR_ID	ERROR_ID.NO_ERROR	Code of error occured during execution NO_ERROR Execution successfully completed ERR_INIT Modbus RTU not properly initialized / out of memory ERR_NOT_CONFIGURED Modbus RTU not configured ERR_FCT_NOT_SUPPORTED Function code not supported ERR_ENDIANESS_NOT_SUPPORTED Endianess / byte order not supported ERR_ILLEGAL_REGISTER_ADDRESS Illegal register address ERR_INVALID_ACCESS Invalid address of local storage of data to read/write, inputs DATA / NB ERR_INTERNAL_ILLEGAL_ARGUMENT Stack reports illegal argument (internal error) ERR_INVALID_SERVER_ADDRESS Invalid server address, must be 1..247 (read) or 0,1..247 (write) ERR_DATA_SIZE Number of data to read/write exceeds capabilities ERR_INVALID_INTERFACE Invalid COM port ERR_INTERNAL_PORTING Porting layer error. Operating system signaled error ERR_INTERNAL_INVALID_HANDLE Illegal argument, unknown instance ‘pHandle’. Internal error ERR_UNEXPECTED_RESULT Unexpected result reported by stack ERR_TIMEOUT Timeout expired. Server did not respond within specified time ERR_EXCEPT_01_ILLEGAL_FUNCTION Illegal function exception. Exception response by Server containing error code 01 / 16#01 ERR_EXCEPT_02_ILLEGAL_DATA_ADDRESS Illegal data address. Exception response by Server containing error code 02 / 16#02 ERR_EXCEPT_03_ILLEGAL_DATA_VALUE Illegal data value. Exception response by Server containing error code 03 / 16#03 ERR_EXCEPT_04_SERVER_DEVICE_FAILURE Server device failure. Exception response by Server containing error code 04 / 16#04 ERR_EXCEPT_05_SERVER_ACKNOWLEDGE Server acknowledge. Exception response by Server containing error code 05 / 16#05 ERR_EXCEPT_06_SERVER_DEVICE_BUSY Server device busy. Exception response by Server containing error code 06 / 16#06 ERR_EXCEPT_07_SERVER_NO_ACKNOWLEDGE Server no acknowledge. Exception response by Server containing error code 07 / 16#07 ERR_EXCEPT_08_MEMORY_PARITY_ERROR Memory parity error. Exception response by Server containing error code 08 / 16#08 ERR_EXCEPT_09_SERVER_PASSIVE Probably passive Server. Exception response by Server containing error code 09 / 16#09 ERR_EXCEPT_0A_GATEWAY_PATH_UNAVAILABLE Gateway path unavailable. Exception response by Server containing error code 10 / 16#0A ERR_EXCEPT_0B_GATEWAY_TARGET_DEVICE Gateway target device failed to respond. Exception response by Server containing error code 11 / 16#0B ERR_INTERNAL_INVALID_STATE Invalid state, fatal internal error ERR_NO_MEMORY Not enough memory BUSY Busy, call again ERR_INTERNAL_IO Internal error in I/O layer ERR_INTERNAL_ILLEGAL_STATE Protocol stack in illegal state. Fatal internal error ERR_INTERNAL_IO_RETRY Retry I/O operation. Operation not yet completed, function to be called again ERR_INTERNAL_UNEXPECTED_STATE Unexpected state. Fatal internal error ERR_UNKNOWN Undefined error	ModRtuMastBase
Input	Com	BYTE	1	Number of the assigned serial interface, 1..