<pre>readMultipleRegisters: START
Connected
Packet: 4dd700000006000330000006
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 ... 
</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(436): ModbusMaster->rec()
#1 /var/www/html/laravel_test/app/Tool/phpmodbus/examples/example_fc3.php(10): ModbusMaster->readMultipleRegisters(0, 12288, 6)
#2 {main}