ABB RELION 650 Series Commissioning Manual page 63

1MRK 504 160-UEN A
PCM600 will revert all forced signals back to unforced and the real signal values will
immediately take effect again.
Commissioning manual
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
Section 9
Testing IED operation
57