8.7 Testing the protection functionality GUID-125B6F28-D3E5-4535-9CD6-6C056B79F496 v2Each protection function must be tested individually by secondary injection.• Verify operating levels (trip) and timers.• Verify alarm and blocking signals.• Use the disturbance handling tool in PCM600 to evaluate that the protectionfunction has received the correct data and responded correctly (signaling andtiming).• Use the event viewer tool in PCM600 to check that only expected events haveoccurred.8.8 Forcing of binary input/output signals for testing8.8.1 Forcing concept GUID-3FD8C676-10E5-432A-8CD5-4643299AD794 v2Forcing of binary inputs and outputs is a convenient way to test wiring in stationsas well as testing configuration logic in the IEDs. Basically it means that all binaryinputs and outputs on the IED I/O modules (BOM, BIM & IOM ) can be set to avalue (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 thecurrent requested state of the output in the IED logic configuration.Be observant that forcing of binary inputs and outputs on an IED,with inappropriate setup, can result in potential danger.8.8.2 How to enable forcing GUID-50280F59-A98C-4E48-AB6D-2B4C138943DD v1To enable forcing, the IED must first be put into IED test mode. While the IED isnot in test mode, the LHMI/PCM600 menus that relate to forcing will not have anyeffect on the input/output status due to safety reasons.8.8.2.1 Enable forcing by using LHMI GUID-41F7C636-75BC-42EF-A955-4BD9E347619E v21. Enable IED TESTMODE by setting IEDTestMode to On under Main menu/Test/IED test mode/TESTMODE:1.Section 8 1MRK 506 383-UEN ATesting IED operation64 Line distance protection REL650 2.2 IECCommissioning manual
