ModbusTCPComm	KEYWORD1			
readAdu	KEYWORD2		
writeAdu	KEYWORD2		
MODBUS_TCP_COMM_SUCCESS	LITERAL1		
MODBUS_TCP_COMM_UNAVAILABLE	LITERAL1		
MODBUS_TCP_COMM_PROTOCOL_ERROR	LITERAL1		
MODBUS_TCP_COMM_LENGTH_ERROR	LITERAL1		