The Siemens PLC has experienced a freeze fault – what’s going on?
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There is a system in use that features a Siemens 315-2DP CPU, along with a 343 communication module, an A/I/O module, and a D/I/O module. It has been experiencing frequent crashes recently. The specific symptoms are as follows: 1. The crashes occur at irregular intervals, with a cycle of 1 to 3 days； 2. When it occurs, the program stops running, and all the indicator lights on the CPU turn on ； 3. Electromagnetic interference and loose cards have been ruled out ； Now I’m wondering: is the CPU damaged? Is there still a problem with the lower-level program? Is it a problem with the higher-level program? Could someone experienced help analyze what exactly is causing this? :time:
There’s diagnostic information in the CPU, right? You can take a look at it; it will be helpful for diagnosing the issue. It’s likely a CPU problem.
I guess there’s a problem with the CPU as well.
Agree with the second-floor opinion; check the CPU’s diagnostic records.
Thank you for all your suggestions. The problem is that the project is located in another location, and the plant’s own control personnel lack sufficient technical skills. :If it can be determined that the problem lies with the CPU hardware, then a new one can be brought in; the concern is that it might not be needed once it’s brought, thus wasting money ； Or if it’s not brought, it’s a wasted trip. :Q So, I was wondering if anyone has encountered a similar problem? How was it solved?
I think it’s a software issue; there is a periodic pattern to it, while hardware problems rarely occur on a periodic basis.:time:
There is no pattern or regularity, and now the system crashes more frequently; it only operates properly for a few hours at a time. I’m very worried!