<pre>writeSingleRegister: START
Connected
Packet: 85320000000600063000fc18
Send
Wait data ... 
Wait data ... 
Wait data ... 
Wait data ... 
Wait data ... 
Wait data ... 
Wait data ... 
Wait data ... 
Wait data ... 
Wait data ... 
Wait data ... 
Wait data ... 
Wait data ... 
Wait data ... 
Wait data ... 
</pre>Exception: Watchdog time expired [ 5 sec]!!! Connection to 192.192.15.51 is not established. in /var/www/html/laravel_test/vendor/adduc/phpmodbus/Phpmodbus/ModbusMaster.php:166
Stack trace:
#0 /var/www/html/laravel_test/vendor/adduc/phpmodbus/Phpmodbus/ModbusMaster.php(742): ModbusMaster->rec()
#1 /var/www/html/laravel_test/vendor/adduc/phpmodbus/examples/example_fc6.php(14): ModbusMaster->writeSingleRegister(0, 12288, Array, Array)
#2 {main}