How to find out Modbus Register address or Output Register for TDD on PM8240 and ION7400

[Parlindungan_Sitorus]

Hi Expert,

We kindly need your help.

We have requirement from a tender specification for PQ meter.

The point that we still do not know is, the TDD on both PM8240 and ION7400.

We check on excel file for PM8240 and ION7400, only on PM8240 there are several list like:

TDD Current A 10 Minute	34681
TDD Current B 10 Minute	34683
TDD Current C 10 Minute	34685

I-TDD Z Comp

43756

PO I-TDD Z Cmp

43788

From this register, which one related to show the TDD?

On ION7400, still could not find the Modbus Register for this TDD parameter.

Please help,

Best regards,

[Charles_Murison · Accepted solution]

Hello @Parlindungan_Sitorus ,

When looking at the ION7400 V4.5.0 Modbus mapping excel file I see the same TDD registers as PM8000 meter. One item to note is that this TDD is from the IEE519 framework. You will need to configure IEEE519 or at least the External numeric 519_I_L in meter for the TDD calculations. The modules performing the TDD are Harmonic Measurement Modules.

Regards,

Charles