<pre>writeMultipleCoils: START
Connected
byte=b11101101
byte=b00001111
byte=b11110000
byte=b11111111
Packet: 68700000000b000f3000002004ed0ff0ff
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 ... 
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(533): ModbusMaster->rec()
#1 /var/www/html/laravel_test/app/Tool/phpmodbus/examples/example_fc15.php(16): ModbusMaster->writeMultipleCoils(0, 12288, Array)
#2 {main}