GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages
MODBUS_REPLY_EXCEPTI(3) libmodbus Manual MODBUS_REPLY_EXCEPTI(3)

modbus_reply_exception - send an exception reponse

*int modbus_reply_exception(modbus_t *ctx, const uint8_t *req, unsigned int exception_code);

The modbus_reply_exception() function shall send an exception response based on the exception_code in argument.

The libmodbus provides the following exception codes:

•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)

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

The function shall return the length of the response sent if successful. Otherwise it shall return -1 and set errno.

EINVAL
The exception code is invalid

modbus_reply(3) libmodbus(7)

The libmodbus documentation was written by Stéphane Raimbault <stephane.raimbault@gmail.com>
04/09/2022 libmodbus v3.1.6

Search for    or go to Top of page |  Section 3 |  Main Index

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with ManDoc.