DeviceNet Troubleshooting
DeviceNet will not function correctly if design rules are not followed. Even a Network previously thought to be functioning correctly may begin to exhibit abnormal or anomalous operations due to incorrect system design. Termination Resistors A termination resistor equal to 121 Ohms 1%, 1/4W must be attached at each end of the Trunk cable. The…
Plc Troubleshooting
Experience or knowledge is needed to troubleshoot plc issues. In order to find the errors on the machine, it is necessary to know the machine. There may be many reasons for fault diagnosis or breakdown in PLCs. You can use the diagnostic LEDs on the plc for errors or you can take advantage of the…
Bus-Off Error 91 on a DeviceNet Network
DeviceNet Network Errors Bus-Off (Error 91) is generally connected to Media and/or Sound issues. Media = DeviceNet Cabling Noise = Electric Disturbance A Bus-Off problem is when several tools on a DeviceNet network detect negative or damaged interaction packages on the network. Some tools will certainly after that shut down with a solid red network…
Allen-Bradley PLC I/O Faults Causes/Solutions
Depending on the controller, the indication of I/O failure will be displayed in various ways. The I/O indicator of the controller (as shown in the example below) flashes green or red. The following table lists common I/O failure codes and corresponding descriptions and recovery methods (if applicable). Each code is listed as a complete hexadecimal…
Omron PLC Error Codes
Omron PLC error codes and description of error codes. Error code (Decimal) Error code (Hex) Meaning 0 0x0 No Error 1 0x1 Not executable in RUN mode 0xa Overrun 11 0xb FCS Error (checksum) 12 0xc Format error (parameter length error) 13 0xd Entry number data error 14 0xe Instruction not found 15 0xf Unknown…
Siemens Step7 PLC Error Code Causes/Solutions
Siemens Step7 Error codes and causes, find the error number in table and check cause. Error number: Text: Cause: Remedy: 1:2063 TBI error 2063 Error during the function chdir TBI can occur with the call AUTgetlinkedObjects. There should be an AUT API tracer in the meantime. 7:6160 CPUs can only be connected via K bus…
Profibus Faults, Network Problems Causes/Solutions, Profibus Faults Issues
There are more PROFIBUS DP Fieldbus nodes installed than any other network (by a big margin). And that doesn’t mean there won’t be a problem with the network. The experts point to these five common issues: 1. Terminator. The number one most common issue– the cable ends at a PROFIBUS device connected with a DB9…
