Hello, I am currently using the Delta 12SE Series PLC. According to the specifications of the PLC, it can easily accommodate 8 modules in the MPU. However, I have encountered a HALT notification and the entire PLC program and physical indicators become stuck when I add an extra module after the 6th module. Upon initial analysis, I checked the total DC load and found it to be less than 2A even with all loads turned on. If anyone has experience with this issue, please let me know the possible reasons for this. The module arrangement I used is as follows: 12SE, 16SP, 16SP, 06PT, 06PT, 06AD, 06AD, 06PT (EXTRA MODULE).
I am experiencing a similar issue.
I am experiencing a similar issue.
Have you found a solution yet?
If you have found a solution, please assist me as well.
It seems like a power issue because even if the total DC load is less than 2A, the PLC might not distribute power equally to all slots. However, it can also be a compatibility issue. The 06PT module is designed for temperature inputs and might have different power requirements or capacities. Try rearranging the modules and see if the problem persists. It's also worth checking the PLC's firmware version to ensure it supports your configuration. Updating firmware often solves a lot of unexpected issues.
I suspect you may be hitting a capacity limitation for the processing memory or the scan time. While Delta 12SE series PLC can indeed handle up to 8 modules, this capacity can diminish based on the complexity, type and number of tasks assigned to each module. The 12SE, 16SP, and 06PT modules are quite demanding in terms of processing needs. While it's worth noting the rack occupation and power consumption too, I'd suggest checking the processing load first. Make sure your tasks are efficiently distributed, try slimming down your program, or consider upgrading to a PLC with higher processing power if all else fails.
I've encountered a similar issue while using the Delta 12SE Series PLC. You've done right by cross-verification of the total DC load, but there could be other pausible reasons as well. Firstly, make sure the addressing of your modules is correct, so no two modules are assigned the same space. Secondly, you might want to disconnect and reconnect all the modules one by one and check the MPU after each addition. This might help you identify a faulty module, if there is one. Further, please ensure the extra module (06PT) is compatible with the 12SE PLC. Issues like this can occur due to compatibility concerns sometimes. If everything else looks good, then it could potentially be a firmware issue or a sign of a defective PLC unit. I would suggest reaching out to the manufacturer or supplier if the problem persists.
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Answer: - The HALT notification could be due to exceeding the maximum module capacity of the MPU. The Delta DVP-12SE PLC is specified to accommodate up to 8 modules, but adding an extra module may cause an overload or compatibility issue.
Answer: - The HALT notification and program getting stuck could be caused by the additional module drawing more current than the PLC can handle, leading to a system overload or a conflict in the module arrangement.
Answer: - To troubleshoot the HALT notification problem, you can start by checking the total DC load to ensure it doesn't exceed the PLC's capacity, verifying the compatibility of the modules being used, and reviewing the module arrangement to identify any potential conflicts or overloads.
Answer: - It is recommended to follow the manufacturer's guidelines for module arrangement and ensure that the total DC load does not exceed the specified limits for the Delta DVP-12SE PLC to
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