<pre>readInputDiscretes: START
Connected
Packet: e2af0000000600023000000c
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/app/Tool/phpmodbus/Phpmodbus/ModbusMaster.php:160
Stack trace:
#0 /var/www/html/laravel_test/app/Tool/phpmodbus/Phpmodbus/ModbusMaster.php(343): ModbusMaster->rec()
#1 /var/www/html/laravel_test/app/Tool/phpmodbus/examples/example_fc2.php(10): ModbusMaster->readInputDiscretes(0, 12288, 12)
#2 {main}