Reboot of CPU 315 - Siemens

orense

Member
Join Date
Apr 2006
Location
Norway
Posts
196
Hi,


Can anyone explain the difference between rebooting a Siemens CPU 315-2 PN/DP, either by setting the switch into stop and back into run, versus turning the power off and back on?

I have a CP341 running as Modbus master towards external device. It has some issues, and freezes some times. Some times it does not help turning cpu switch to stop, and back to run, but it does help rebooting the 24VDC. This makes me wonder what the difference is, and if it has to do with buffers being cleared etc.


Thanks for any answers...
 
There is nothing functionally between removing power or using the STOP/RUN selector. In both cases, the CPU does a warm restart. I think your issue is with the CP 341.

Can you explain to everyone the difference between cold start and warm start then? Can you also approach when OB102 and 100 are called as well?
 
When you say it freezes do you mean go into stop or just does not control i.e. program in PLC not functioning even though it is in run.

If run LED is on then I suggest this is a bug in the code and powering down resets some flags or if communication freezes then I think you need to look at PLC Code or Comms.
 

Similar Topics

Hi guy we just finish a job with a GE CPUE05 Versamax. The last week-end the cpu reboot all alone and was reset to factory state, the program and...
Replies
13
Views
5,370
I have got an Rockwell PLC 1769-L36ERMS . I have assigned a IP address to it . But every-time I Reboot the PLC it looses Communication to my PC...
Replies
1
Views
139
Hello All, I need the ability to remotely reboot a Red Lion CR3000 HMI. Due to some graphics issues when the database is updated the HMI must be...
Replies
4
Views
328
Hi all, I use e won for my OPCUA to back up my PLC (B&R X20 system) data. Whenever e won does maintenance updates, I need to reboot the e won in...
Replies
2
Views
514
I have an installation with a Compact GuardLogix 5380 CPU [5069-L306ERS2] that is experiencing a strange issue I have never encountered before...
Replies
15
Views
3,002
Back
Top Bottom