ABB Relion 650 Series REL650 Commissioning Manual page 165

1MRK 506 331-UUS A
Commissioning Manual
In PCM600, only the result of these operations can be checked by right-
clicking the product and selecting Signal Monitoring tool and then
navigating to the actual I/O-board and the binary input in question. The
activated output signal is indicated with a yellow-lit diode. Each BOn_PO is
represented by two signals. The first signal in LHMI is the actual value 1 or
0 of the output, and in PCM600 a lit or dimmed diode. The second signal is
the status Normal or Forced. Forced status is only achieved when the BO is
set to Forced or operated on the LHMI.
An initially high contact resistance does not cause problems as it is reduced quickly by
the electrical cleaning effect of fritting and thermal destruction of layers, bringing the
contact resistance back to the mOhm range. As a result, practically the full voltage is
available at the load.
Set the parameter TestMode to disable after completing these
tests. The Pickup LED stops flashing when the relay is no
longer in test mode.
Section 8
Troubleshooting
157