<pre>readCoils: START
Connected
Packet: c1480000000600013000000c
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 'Exception' with message 'Watchdog time expired [ 5 sec]!!! Connection to 192.192.15.51 is not established.' in /var/www/html/Modbus/phpmodbus/Phpmodbus/ModbusMaster.php:160
Stack trace:
#0 /var/www/html/Modbus/phpmodbus/Phpmodbus/ModbusMaster.php(228): ModbusMaster->rec()
#1 /var/www/html/Modbus/phpmodbus/examples/example_fc1.php(10): ModbusMaster->readCoils(0, 12288, 12)
#2 {main}