ABB RET670 Applications Manual page 99

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ANSI07000199 V1 EN

Configuration for using an instance in task time group 2 as DFT

Assume instance SMAI4:16 in task time group 2 has been selected in the configuration

to control the frequency tracking for all instances. Observe that the selected reference

instance (i.e. frequency tracking master) must be a voltage type. Observe that positive

sequence voltage is used for the frequency tracking feature.

For task time group 1 this gives the following settings (see Figure

SMAI1:1 – SMAI12:12: DFTReference = ExternalDFTRef to use DFTSPFC input as

reference (SMAI4:16)

For task time group 2 this gives the following settings:

SMAI1:13: DFTRefExtOut = AdDFTRefCh4 to route SMAI4:16 reference to the

SPFCOUT output, DFTReference = AdDFTRefCh4 for SMAI1:13 to use SMAI4:16 as

reference (see Figure 24) SMAI2:14 – SMAI12:24: DFTReference = AdDFTRefCh4 to

use SMAI4:16 as reference.

For task time group 3 this gives the following settings:

SMAI1:25 – SMAI12:36: DFTReference = ExternalDFTRef to use DFTSPFC input as

reference (SMAI4:16)

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