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Man Pages


Manual Reference Pages  -  MODBUS_MASK_WRITE_REGISTER (3)

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NAME

modbus_mask_write_register - mask a single register

CONTENTS

SYNOPSIS

int modbus_mask_write_register(modbus_t *ctx, int addr, uint16_t and, uint16_t or);

DESCRIPTION

The modbus_mask_write_register() function shall modify the value of the holding register at the address addr of the remote device using the algorithm:

new value = (current value AND and) OR (or AND (NOT and))

The function uses the Modbus function code 0x16 (mask single register).

RETURN VALUE

The modbus_mask_write_register() function shall return 1 if successful. Otherwise it shall return -1 and set errno.

SEE ALSO

modbus_read_registers(3) modbus_write_registers(3)

AUTHORS

Martijn de Gouw <\m[blue]martijn.de.gouw@prodrive.nl\m[][1]> The libmodbus documentation was written by St\(&#146;ephane Raimbault <\m[blue]stephane.raimbault@gmail.com\m[][2]>

NOTES

1. martijn.de.gouw@prodrive.nl  mailto:martijn.de.gouw@prodrive.nl
2. stephane.raimbault@gmail.com  mailto:stephane.raimbault@gmail.com
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libmodbus 3&.1&.0 MODBUS_MASK_WRITE_RE (3) 10/06/2013

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