Hitachi Relion 670 Series Commissioning Manual page 92

Section 10
Testing IED operation
IEC15000031 V1 EN-US
2. Click Yes in the confirmation dialogue box.
PCM600 will revert all forced signals back to unforced and the real signal values will immediately
take effect again.
86
This may change both binary input values and output relay states and will undo any forcing
done by using the LHMI.
If the IED is left in test mode, then it is still possible to perform new forcing operations, both
from LHMI and from PCM600
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1MRK506371-UUS Rev. M
Line distance protection REL670
Commissioning manual