PM8000 - Burst data logging length and configuration

[ausfrosty]

Hi,

I have an application that requires the frequency to be monitored constantly and if excursions outside of specific ranges occur then pre excursion (for 5s) and post excursion (for 60s) data (Frequency and real power) need to be recorded with at least 50ms granularity. 

According to the PM8000 manual (7EN02-0336-08) page 196 it appears that the PM8000 can be configured to do something along these lines however the examples shown in the document are for very short periods (16 records = 160ms)

To record 65s of data this would be at half cycle sampling on a 50Hz grid be a total of 65s x 50cycles/s x 2 half cycles +1 = 6501 records.

Is it possible to configure such long high speed data bursts on a PM8000?

If yes if anyone could show me a couple of screens shots of how this is done it would be appreciated. I do not have a PM8000 meter to hand and have been trying to configure this via the PM8000 simulator however I feel that it may not have all the current features including this functionality as its firmware is a very early revision.

[Charles_Murison]

Hello @ausfrosty 

Below is a screenshot of what the setup registers of a data recorder could look like. The example below for a 50 Hz system would have 5 seconds pre trigger, and 60 seconds post trigger. A buffer to record 2 events and a recorder depth of 10 events. Note buffer size and depth must both be multiples of (pre + post + 1)

Inputs to the data recorder will need to be high speed from HS power meter module. The trigger to record would also need to come from a high speed source.

Regards,

Charles

[ausfrosty]

Hi Charles,

Thanks, very helpful.

A couple of questions on your response (I am new to Scheider meters so excuse simple questons)

1) You mention inputs need to come from a "HS power meter module". Upon reading this it made me think that aside from the PM8000 I actually need another piece of hardware/module. I found the following however under ION9000 information

https://www.productinfo.schneider-electric.com/ion9000/595e26f146e0fb0001f6ffc4/IONReference/English...

This therefor seems to suggest the HS Power Meter module is simply a software module within the device? It explicitily states "Not all ION device support the high speed power meter module.

Can you confirm that the PM8000 does support/have embedded the HS Power Meter module? The fact that it can record at 1/2 cycle intervals would seem to suggest it does.

2) You have also said that "the trigger needs to come from a high speed source". What does this effectively mean in terms of the configuration and or where is it configured?

Say for instance I want to trigger the event/data capture (5s pre, 60s after) if the frequency drops below 48.7Hz?

3) Finally do you mind screenshotting the base tree view in ION setup assistant of your PM8000? See attached of mine from the PM8000 simulator. I cannot find the Data Rec 15 screen you have presented. Again maybe because I only have the simulator?

Thanks again.

[Charles_Murison · Accepted solution]

Hello @ausfrosty 

1) Yes, the PM8000 meter has HS power meter modules. This is a module inside the meter.

2) There are possibly different ways to trigger you condition, if the module used to trigger is either only 1 second updates or configured such that module is 1 second updates, the data recorder will be a 1 second update recorder. The logging intervals would be 1 second rather than a half cycle. For example if you have a setpoint module with input linked to regular Power meter module, the setpoint module will be a 1 second module.

3) I used the advanced setup option in ION Setup to create and configure the specific data recorder. If you have questions about this I would suggest contacting your local technical support se.com -> support ->contact support.

Regards,

Charles

[ausfrosty]

Hi Charles,

Expecting a PM8000 delivery this week so will hopefully have less uneducated questions...

I was wondering if the Data Record log files can be captured as Comtrade files? It would appear from documentation that only Waveform recorder outputs can be output to Comtrade files?

[Charles_Murison]

Hello @ausfrosty ,

Correct only waveform recorders in COMTRADE files.

Regards,

Charles