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Man Pages


Manual Reference Pages  -  MODBUS_RECEIVE (3)

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NAME

modbus_receive - receive a indication request

CONTENTS

SYNOPSIS

int modbus_receive(modbus_t *ctx, uint8_t *req);

DESCRIPTION

The modbus_receive() function shall receive an indication request from the socket of the context ctx. This function is used by Modbus slave/server to receive and analyze indication request sent by the masters/clients.

If you need to use another socket or file descriptor than the one defined in the context ctx, see the function modbus_set_socket(3).

RETURN VALUE

The modbus_receive() function shall store the indication request in req and return the request length if sucessful. The returned request length can be zero if the indication request is ignored (eg. a query for another slave in RTU mode). Otherwise it shall return -1 and set errno.

SEE ALSO

modbus_set_socket(3) modbus_reply(3)

AUTHORS

The libmodbus documentation was written by St\(&#146;ephane Raimbault <\m[blue]stephane.raimbault@gmail.com\m[][1]>

NOTES

1. stephane.raimbault@gmail.com  mailto:stephane.raimbault@gmail.com
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libmodbus 3&.1&.0 MODBUS_RECEIVE (3) 10/06/2013

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