table of contents
MODBUS_REPLY_EXCEPTI(3) | Libmodbus Manual | MODBUS_REPLY_EXCEPTI(3) |
NAME¶
modbus_reply_exception - send an exception reponseSYNOPSIS¶
*int modbus_reply_exception(modbus_t * ctx, const uint8_t *req, unsigned int exception_code);DESCRIPTION¶
The modbus_reply_exception() function shall send an exception response based on the exception_code in argument.•MODBUS_EXCEPTION_ILLEGAL_FUNCTION
(1)
•MODBUS_EXCEPTION_ILLEGAL_DATA_ADDRESS
(2)
•MODBUS_EXCEPTION_ILLEGAL_DATA_VALUE
(3)
•MODBUS_EXCEPTION_SLAVE_OR_SERVER_FAILURE
(4)
•MODBUS_EXCEPTION_ACKNOWLEDGE (5)
•MODBUS_EXCEPTION_SLAVE_OR_SERVER_BUSY
(6)
•MODBUS_EXCEPTION_NEGATIVE_ACKNOWLEDGE
(7)
•MODBUS_EXCEPTION_MEMORY_PARITY
(8)
•MODBUS_EXCEPTION_NOT_DEFINED (9)
•MODBUS_EXCEPTION_GATEWAY_PATH
(10)
•MODBUS_EXCEPTION_GATEWAY_TARGET
(11)
RETURN VALUE¶
The modbus_reply_exception() function shall return the length of the response sent if successful. Otherwise it shall return -1 and set errno.ERRORS¶
EINVALThe exception code is invalid
SEE ALSO¶
modbus_reply(3) libmodbus(7)AUTHORS¶
The libmodbus documentation was written by Stéphane Raimbault < stephane.raimbault@gmail.com[1]>NOTES¶
- 1.
- stephane.raimbault@gmail.com
mailto:stephane.raimbault@gmail.com
05/26/2012 | libmodbus 3.0.3 |