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1MRS 750942-MUM
Combined Overvoltage and Undervoltage Relay
Technical Reference Manual
REU 523
Control parameters
Table 4.1.10.4-7 Control parameters
Description Parameter R, W Value
Unlatching output contacts V101 W 1 = unlatch
Clearing registers and unlatching
output contacts
V102 W 1 = clear and unlatch
Rated frequency V133 R, W (P) 50=50 Hz
60=60 Hz
Nominal voltage V134 R, W (P) 100, 110, 115, 120 (V)
Remote control of settings V150 R, W 0 = setting group 1
1 = setting group 2
Non-volatile memory settings V152 R, W 0...31
Event mask for U> and U>> V155 R, W
0...255, see Event codes
Event mask for U< and U<< V156 R, W
0...255, see Event codes
Event mask for output contacts’
events
V157 R, W
0...255, see Event codes
Event mask for the disturbance
recorder and the HMI password
V158 R, W 0...7, see Event codes
Entering the SPA password for
settings
V160 W 1...999
Changing the SPA password or
reinstating the password
protection
V161 W (P) 1...999
Changing the HMI password V162 W 1...999
999 = password disabled
Activating the self-supervision V165 W 1 = the self-supervision output
contact is activated and the
READY indicator LED starts to
blink
0 = normal operation
LED test for start and trip
indicators
V166 W (P) 0 = start and trip LEDs off
1 = trip LED on, start LED off
2 = start LED on, trip LED off
3 = start and trip LEDs on
Default settings V167 W (P) 2 = restore factory settings
Internal fault code V169 R 0...255
Unit address of the relay V200 R, W 1...254
Data transfer rate, kbps V201 R, W 4.8 or 9.6
Rear communication V202 W 1 = rear connector activated
Relay serial number V230 R ERxxxxxx
CPU serial number V231 R MRxxxxxx
Article number V232 R 1MRS091409-BAA
Test date V233 R YYYYMMDD
Software number V234 R 1MRS118017
Software revision V235 R A...Z
Date reading and setting
(RED 500 format)
V250 R, W YY-MM-DD
Time reading and setting
(RED 500 format)
V251 R, W HH.MM; SS.sss
Reading of an event register L R Time, channel number and
event code
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