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22
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22
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Relay settings not showing on the display.
When using relays the active alarms will display on the front screen, unless there is a Bund
Alarm fitted in which case the M Master symbol will show and the B Bund symbol. The relays
are still active just not shown on the front display.
•
Relay R4 and R5
The R4 has 4 level trigger points, M,1,2,3.
The R5 has 4 level trigger points and one volt free out for the B (Bund) as well. The M
(Master) alarm can be acknowledged from the front panel and this action resets this output.
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Testing Alarm
The test feature is a press and hold for 5 seconds to activate. Press again to mute.
•
Unable to connect the gauge to PC / Laptop
The Laptop connection is with a USB to RS-
485 cable. You need to know which “Port” the
cable is associated with. This needs to be set in the Program Settings. Please see the section
in the manual that advises how to do this. (See pages 6 to 8).
Please do not call OLE if communication is the issue as we are not
IT
experts.
•
Gauge reads HIGH or LOW
The sensor parameters must be set based on the sensor range and
NOT
the tank height.
•
Alarm trigger point errors
These can be reset by connection to a laptop and running the OLD configuration software
•
Displayed Litres is LOW
Damage to the input circuitry can make the gauge read low by 5% and 10%. Check the board
for a burning smell. The board is usually beyond economical repair and suggest purchasing a
new board, Part No. T4020-0002B.
•
Bund Alarm Connection
Bund alarm is connected but does not operate. Check the black jumper is on the 2 pins next
to the green 2-way connector. (See page 4). Power down and then back up and the B symbol
will show on the display.
•
H Alarm
H (HIGH or Water) alarm is connected but does not operate. Check the black jumper is on
the 2 pins next to the green 2-way connector. (See page 4). Power down and then back up
and the B symbol will show on the display.
Summary of Contents for T4020
Page 14: ...Page 13 of 22 Appendix 1 T5020 Wiring Diagram ...
Page 15: ...Page 14 of 22 Appendix 2 Modbus Register Table ...
Page 16: ...Page 15 of 22 ...
Page 17: ...Page 16 of 22 ...
Page 18: ...Page 17 of 22 ...
