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Man Pages


Manual Reference Pages  -  MODBUS_CONNECT (3)

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NAME

modbus_connect - establish a Modbus connection

CONTENTS

SYNOPSIS

int modbus_connect(modbus_t *ctx);

DESCRIPTION

The modbus_connect() function shall etablish a connection to a Modbus server, a network or a bus using the context information of libmodbus context given in argument.

RETURN VALUE

The modbus_connect() function shall return 0 if successful. Otherwise it shall return -1 and set errno to one of the values defined by the system calls of the underlying platform.

EXAMPLE

modbus_t *ctx;

ctx = modbus_new_tcp("127.0.0.1", 502); if (modbus_connect(ctx) == -1) { fprintf(stderr, "Connection failed: %s\n", modbus_strerror(errno)); modbus_free(ctx); return -1; }

SEE ALSO

modbus_close(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_CONNECT (3) 10/06/2013

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