Trouble Shooting - Siemens 7SG11 Technical Manual

5 Trouble shooting

OBSERVATION
Relay does not power up.
Relay won't accept the password.
Protection Healthy LED flashes
LCD screen flashes continuously.
Backlight is on but no text can be seen.
Scrolling text messages are unreadable.
Relay displays one instrument after another with
no user intervention.
The LCD is stuck at the 'General Alarms' screen
and is displaying 'Trip Circuit Failure Sx'.
1..5)
Cannot communicate with the relay.
Relays will not communicate in a ring network.
©2011 Siemens Protection Devices Limited
Check that the correct auxiliary DC voltage is applied and
that the polarity is correct.
The Password being entered is wrong. Enter correct
password.
If correct password has been forgotten, note down the
Numeric Code which is displayed at the Change
Password screen e.g.
Change Password
Code= 123456789
To retrieve the password communicate this code to the
nearest Reyrolle representative.
General failure. Contact Reyrolle.
The LCD has many possible error messages which when
displayed will flash continuously. These indicate various
processor card faults.
General failure. Contact Reyrolle.
Adjust the contrast.
Adjust the contrast.
Default instruments are enabled. Remove all instruments
from the default list and only add those which are
required.
Frequency
50.003Hz
The indicates that the instrument is a default
'D'
instrument. Press ENTER to deselect it.
(See Description of Operation – subsection 4.5 of this
manual).
The trip circuit failure feature is enabled and is expecting
(x = a healthy status input signal. Energise the correct Status
Input, or disable the trip circuit feature if it is not required.
•
Check that all of the communications settings match
those used by Reydisp Evolution.
•
Check that the Tx and Rx fibre-optic cables are
connected correctly.
( Tx –> Rx and Rx –> Tx ).
•
Check that all cables, modems and fibre-optic cables
work correctly.
•
Set the line idle setting to Light On. Examine the Tx
port on the back of the relay, with the fibre removed,
and check that it is glowing red. If it is not then the
communications board on the case may not be
aligned correctly with the processor card socket.
Contact Reyrolle.
(WARNING : DO NOT LOOK AT THE FIBRE-OPTIC
TRANSMITTER FOR A PROLONGED TIME).
(See Communications Interface section of
this manual).
•
Check that the Data Echo setting on all relays is set
to ON.
•
Check that all relays are powered up.
•
Check that all relays have unique addresses.
7SG11 Argus 8 Commissioning
ACTION
Chapter 7 Page 9 of 12