<?php require_once dirname(__FILE__) . '/../Phpmodbus/ModbusMaster.php'; // Create Modbus object $modbus = new ModbusMaster("192.192.15.51", "UDP"); // Data to be writen $data = array(TRUE, FALSE, TRUE, TRUE, FALSE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, TRUE); try { // FC15 $modbus->writeMultipleCoils(0, 12288, $data); } catch (Exception $e) { // Print error information if any echo $modbus; echo $e; exit; } // Print status information echo $modbus;