Modbus poll connection failed
Suppose Modbus-Poll still displays a timeout message after following the above steps.
If the communication is successful, it can be seen that the No connection at the top of the address table disappears, and then the data of Tx is constantly changing. Otherwise, modbus communication will fail. The IP and port should be consistent with those specified on the indicator. Open Modbus-Poll software, click Connection on the menu bar, and set IP and port on the pop-up window. Then set the IP address and port number in the communication parameters of the GMT-P1 we need to set it as a unique IP that cannot be used in any other indicators. In this case, the chip or circuit of network port may be broken. Neither green light nor yellow light is on, which means connection failed as well. We need to reconnect the cable or power off the indicator and restart it.ģ. Both green light and yellow light are flashing, which means connection failed. Green light is on, yellow light is flashing, which means the network is connected well.Ģ. The chips or circuits of the indicator are broken.Īnother is the communication parameter setting problem:įirst, by connecting GMT-P1 with the network cable and the power supply, we can clearly know the network connection by checking the two indicator lights next to the network port slot.ġ. The main causes for TCP connection are two problems one is hardware problem:Ģ.
Modbus poll connection failed how to#
After watching this video, you will know how to find out the Modbus TCP connection problem. Today's topic is 'weighing indicator GMT-P1(TCP) communication port troubleshooting'. Hello, welcome to the General Measure's Channel.