• Verify operating levels (trip) and timers.• Verify alarm and blocking signals.• Use the disturbance handling tool in PCM600 to evaluate that the protection function hasreceived the correct data and responded correctly (signaling and timing).• Use the event viewer tool in PCM600 to check that only expected events have occurred.11.8 Forcing of binary I/O signals for testing11.8.1 Forcing concept GUID-3FD8C676-10E5-432A-8CD5-4643299AD794 v1Forcing of binary inputs and outputs is a convenient way to test wiring in substations as wellas testing configuration logic in the IEDs. Basically it means that all binary inputs and outputson 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 theactual signal voltage present on the input. For outputs, any output relay can be forced to beactive or not, regardless of the current requested state of the output in the IED logicconfiguration.Be observant that forcing of binary inputs and outputs on an IED, withinappropriate setup, can result in potential danger.11.8.2 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 is not in testmode, the LHMI/PCM600 menus that relate to forcing will not have any effect on the input/output status due to safety reasons.11.8.2.1 Enable forcing by using LHMI GUID-41F7C636-75BC-42EF-A955-4BD9E347619E v11. Enable IED Testmode by settingIEDTestMode toOn under Main menu/Test/IED testmode TESTMODE:1.IEC15000029 V1 EN-US2. Exit back to the root menu.3. SelectYes in the save dialogue box.Once the IED is in test mode the yellow Start LED starts to blink.Section 11 1MRK 502 067-UEN BTesting IED operation90Commissioning manual
