Forcing Of Binary Input/Output Signals For Testing; Forcing Concept; How To Enable Forcing; Enable Forcing By Using Lhmi - Hitachi Relion 670 Series Commissioning Manual

1MRK506371-UUS Rev. M
10.8

Forcing of binary input/output signals for testing

10.8.1

Forcing concept

Forcing of binary inputs and outputs is a convenient way to test wiring in substations 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 & SOM) 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.
10.8.2

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.
10.8.2.1

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.
10.8.2.2

Enable forcing using TESTMODE function block

• Use the TESTMODE function block, appropriately configured in PCM600/ACT.
Line distance protection REL670
Commissioning manual
Be observant that forcing of binary inputs and outputs on an IED, with inappropriate setup,
can result in potential danger.
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Section 10
Testing IED operation
GUID-3FD8C676-10E5-432A-8CD5-4643299AD794 v2
GUID-50280F59-A98C-4E48-AB6D-2B4C138943DD v2
GUID-41F7C636-75BC-42EF-A955-4BD9E347619E v2
GUID-DD17B7D6-516F-4561-9D30-906B968EAFE0 v2
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