modbus_reply_exception man page

modbus_reply_exception — send an exception reponse

Synopsis

*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.

The libmodbus provides the following exception codes:

The initial request req is required to build a valid response.

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

EINVAL

The 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

Referenced By

libmodbus(7), modbus_reply(3).

04/02/2014 libmodbus 3.0.6 Libmodbus Manual