Forcing Of Binary Input/Output Signals For Testing; Forcing Concept; How To Enable Forcing; Enable Forcing By Using Lhmi - ABB Relion 650 Series Commissioning Manual

Section 8
Testing IED operation
• Verify operating levels (trip) and timers.
• Verify alarm and blocking signals.
• Use the disturbance handling tool in PCM600 to evaluate that the protection function has
received the correct data and responded correctly (signaling and timing).
• Use the event viewer tool in PCM600 to check that only expected events have occurred.
8.8

Forcing of binary input/output signals for testing

8.8.1

Forcing concept

Forcing of binary inputs and outputs is a convenient way to test wiring in stations as well as testing
configuration logic in the IEDs. Basically it means that all binary inputs and outputs on the IED I/O
modules (BOM, BIM & IOM ) can be set to a value (i.e active or not-active), selected by the user,
while the IED is in test mode. For inputs, this is true regardless of the actual signal voltage present
on the input. For outputs, any output relay can be forced to be active or not, regardless of the current
requested state of the output in the IED logic configuration.
8.8.2

How to enable forcing

To enable forcing, the IED must first be put into IED test mode. While the IED is not in test mode, the
LHMI/PCM600 menus that relate to forcing will not have any effect on the input/output status due to
safety reasons.
8.8.2.1

Enable forcing by using LHMI

1. Enable IED TESTMODE by setting IEDTestMode to On under Main menu /Test /IED test
mode /TESTMODE:1 .
IEC15000029 V1 EN-US
2. Exit back to the root menu.
3. Select Yes in the save dialogue box.
Once the IED is in test mode the yellow Start LED starts to blink.
8.8.2.2

Enable forcing using TESTMODE function block

54
Be observant that forcing of binary inputs and outputs on an IED, with inappropriate
setup, can result in potential danger.
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