Download fail

[mhw]

I have a DM1E that I am connected to with a VPN. I tried to make a program change today. I get the message in the attachment. I pinged the PLC and the average time is 155ms. The communication timeout is set to 1000 in DMD. Any ideas how I can bring this back to life remotely.
Thanks

[franji1]

What version of Designer are you using? 2.9.3?  2.10.1?

[mhw]

v2.10.4

[franji1]

v2.10.4

Good.  That's the most recent version.

So basically, the PLC is still updating the PREVIOUS Project Write to PLC.  Connect to the PLC and look at ST192.  That tells you that the PLC is "busy" switching your ladder logic and project from one to the new one.

Connect to the PLC and bring up a Trend View or Data View with ST192.  See when it goes OFF.  Then try doing a Write to PLC again.

[mhw]

It has been over 12 hours and the ST192 has not cleared. The old program is running fine. I just can't do any updates to it.

[franji1]

Read DST11 in hexadecimal format in a Data View and let us know what value(s) it has

[mhw]

DST11 = 0x00000001

[franji1]

You probably need to CLEAR the PLC and write the entire project.

We think bad comm can cause this.  Updating a PLC project or updating firmware with slightly questionable comm causes these issues.  ALL OF IT must work.  If one part (System Configuration, Documentation, Program) gets messed up - your PLC won't work right.

I would recommend ALWAYS doing a PROGRAM mode update - never RUNTIME EDIT when you have slightly questionable comm (large timeouts and retries can only do so much).  If it works, then put the PLC in RUN mode.  If it fails, try again.  Keep trying.  If it fails like what you are seeing now, you will need to CLEAR the PLC.