We have a Mk V with an NT Cimplicity HMI system that lost its emergency trip totalizer value. We recently had an outage where the Mk V was shutdown through the outage. When the panel was powered up, the totalizer for emergency trips had changed from 49 to 0. It appears all the other totalized values are correct.

Has anyone experienced this type of problem? Is there any documented procedure for correcting the value in the Mk V?

Thank you in advance for any thoughts you may have.
MkVFieldTech

 

This kind of problem happens sometimes during EEPROM upgrades (MKV IDP), which involves the so called totalizer. You may reboot the MKV by switching of all the RST and switching on all the three (RST)power switches at the same time (not an easy task, try your luck).

Alternatively, you can try to force the particular trip signal till you match your required emergency trip.

As a last resort, try to get the small executable file which will allow you to manipulate all the totalizer values ( this is proprietary software).

Good Luck,
A. Oztas

 

The re-booting all processors all at once usually only works if one or two processors have different timer/counter values from the other processors. And, it's not powering them up all at the same time, it's powering them all down at the same time, then powering them up one at a time that allows the Designated Voter's value to bring the other processors' values into agreement. That doesn't seem to be the case here.

Of A. Oztas' suggestions, the best one is the second one. Usually, logic signal L30CES is the one that, when it changes state from logic "0" to logic "1" increments the Emergency Trips counter. So, you could use Logic Forcing to toggle L30CES while watching the value on the Counters display until it gets back to 49.

The last suggestion does involve a proprietary executable file that GE tried very hard to prevent from being widely distributed (for obvious reasons). While it's likely there are copies floating around, using the executable is like using all command-line executables for the Mark V: It's not well-documented and it's not easy. And, for the changes to work, one needs to download them to all the processors, then power all the processors down, then power them all back up one at a time. And even then, sometimes the values don't all get reset until the next cycle that the RAM values are written to EEPROM.

So, it's suggested you look at your CSP and if L30CES is the Emergency Trip Counter logic signal, then toggle it slowly using Logic Forcing to increment the counter value back to 49.

 

Thank you for your response. I'll ask around to see if anyone has the software you mentioned. That would be very helpful when someone downloads all and not user. It's happen before.

MkVFieldTech