<pre>readInputDiscretes: START
Connected
Packet: cdbd00000006000200000002
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/Phpmodbus08/Phpmodbus/ModbusMaster.php:166
Stack trace:
#0 /var/www/html/Modbus/Phpmodbus08/Phpmodbus/ModbusMaster.php(349): ModbusMaster->rec()
#1 /var/www/html/Modbus/Phpmodbus08/examples/example_fc2.php(11): ModbusMaster->readInputDiscretes(0, 0, 2)
#2 {main}