ABB Remote I/O RIO600 Installation And Commissioning Manual page 140

Section 6
Commissioning
Sl.No PCM600 Fault
setting direction
4 Reverse Forward
5 Reverse
6 Forward
with
previous
reverse
1) In the third case, start and operate are latched in the WHMI because of a forward fault. If the fault direction changes before the previous fault
is cleared, the WHMI shows the direction as reverse since its direction variable is updated with the latest condition in SIM and start and
operate are not cleared as they are latched. In the second case, the WHMI shows Unknown direction because it ignores the direction
information if start and operate are not triggered.
132
ACT outputs
Start Operate OpFwd
No No Yes
Yes Yes No
No No Yes
To keep the operate timer active between current spikes during
intermittent earth fault, Reset delay time should be set to a value
exceeding the maximum expected time interval between fault spikes
(obtained at full resonance condition). The recommended value is at
least 300 ms.
SIM8F WHMI
panel
OpRev Start
LED
No - -
Yes Red ON
No Red Latched
(Flashing) since a
reverse
fault
occurred
in prior
Installation and Commissioning Manual
1MRS757488 H
Remarks
Operate Direction
eous
value
since Str
and Op
are
latched.
- Unknown
ON Reverse
Forward WHMI
direction
is
updated
with
instantan
eous
value
since Str
and Op
are
latched.
RIO600