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ANSI09000643-1-en.vsd

IEC 61850

ANSI09000643 V1 EN

Figure 9: Connection example of the test equipment to the IED when test

equipment is connected to the transformer input module

5.5 Releasing the function to be tested

Release or unblock the function to be tested. This is done to ensure that only the function

or the chain of functions to be tested are in operation and that other functions are prevented

from operating. Release the tested function(s) by setting the corresponding Blocked

parameter under Function test modes to No in the local HMI.

When testing a function in this blocking feature, remember that not only the actual

function must be activated, but the whole sequence of interconnected functions (from

measuring inputs to binary output contacts), including logic must be activated. Before

starting a new test mode session, scroll through every function to ensure that only the

function to be tested (and the interconnected ones) have the parameters Blocked and

eventually EvDisable set to No and Yes respectively. Remember that a function is also

blocked if the BLOCK input signal on the corresponding function block is active, which

depends on the configuration. Ensure that the logical status of the BLOCK input signal is

equal to 0 for the function to be tested. Event function blocks can also be individually

blocked to ensure that no events are reported to a remote station during the test. This is

done by setting the parameter EvDisable to Yes.

1MRK 505 293-UUS A Section 5

Testing IED operation

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ABB REQ650 Commissioning Manual

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