REF 542plus switchbay protection and control unit
Manual Part 3: Installation and Commissioning
1VTA100004-en DMS,2001-10-04 REF542plus: Installation and Commissioning 53 / 80
6.4.4 E-Key test
This test consists of the following steps:
The LCD display for the E-Key Test Page is shown in the following figure:
ELECTRONIC KEY TEST
Insert the ABB Key
within 5 sec
↵
From RHMI
test page
To RHMI
test page
Figure 16: E-Key Test Page
The so called ABB-key must be inserted within 5 seconds. Afterwards the test will end
with OK result. Otherwise, the result is FAIL.
6.4.5 Serial ports test
This test is performed by connecting the loop-back cable, cable that is normally used
for the connection between PC and HMI Local Control Unit, between the port X20 and
the optical connector on the HMI front panel.
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REF542 plus
Alarm
NetworkCommunication
Ready
100%0
100%0
100%0
Menu
↵
↵↵
↵
Open
CB
M1
M2
M3
M2 V
Interlocking
Optical RS 232 to
half duplex RS 485
converter
SERIAL PORTS TEST
Please, be sure that
the two serial ports are
connected with the
loopback cable
Figure 17: RHMI serial ports test
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