I'm experiencing communication issues between a 1400 PLC and an L23E controller. Recently, I received a notification indicating that one of our systems had gone offline and required a program reload. I visited the site to investigate and found that the 1400 was displaying an error. I switched from remote mode to program mode and connected directly to the unit. However, I was unable to access the program, so I retrieved a copy from the server. Once I switched to run mode, everything functioned correctly, allowing me to revert to remote mode before leaving the site. The following day, I received another alert from the same location, reporting that the 1400 PLC was unresponsive, and the operator had to manually control the pumps. I returned to the site and established a connection without needing to download the program again. During my examination, I discovered a hexadecimal error 'e6' present in both the sent and received messages. As I navigated through the HMI screens, I observed that none of the readings from the main PLC were visible on the HMI. Instead, only the values defined in the "less than" commands within the code were being displayed. It's clear that the main PLC is not transmitting any data to the 1400, and all I can ascertain is that the error code is 'e6'. I'm seeking assistance from anyone who might have encountered this issue before. I recall this error being discussed in a previous post but can't locate the solution. Any help or insights would be greatly appreciated.
"The E6H -Target Node has returned an error message: 'Illegal Address - the specified address is either nonexistent or not associated with a valid command.' Were any changes made to the Ethernet port configurations during the program download? If adjustments were made, it’s essential to perform a power cycle on the Micrologix for the changes to take effect. Please provide more details regarding the configuration of the messages and the corresponding ports."
In the server code, the IP configuration was set to 192.168.1.40, while the network utilized an IP address format of 10.10.10.x. Prior to downloading the program, I needed to update the IP address within the code. The write-side message indicates to the L23E that the 1400 system is prepared for operation. Meanwhile, the read-side functionality instructs the 1400 on which pumps to activate and which data readings to present on the Human-Machine Interface (HMI). To assist further, I’ve included a snapshot of the message code along with a screenshot of the error. I hope this information proves helpful!
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Answer: - Verify the network connections and ensure there are no physical disruptions. - Check the configuration settings on both the 1400 PLC and the L23E controller for any discrepancies. - Ensure that the firmware on both devices is up-to-date. - Examine the error logs for specific messages that could provide additional insights. - If the issue persists, consider consulting the device manuals or reaching out to technical support for further assistance.
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