Technical Notice CSO/CPO V1.1 / 10.14
Page 65 / 86
Options 9
9.1.14 Programmable troubleshooting logic controller (Y)
9.1.14.1 Description of the option
The programmable logic controller (PLC) is used to monitor and determine unit operation, depending on
the various control devices used (e.g. pressure gauge, level gauge, flow meter, switch, temperature
probe, etc.).
When a fault occurs, the red indicator light on the front of the unit comes on, causing the unit to shut
down. The PLC displays the fault resolution procedure in 3 languages. It therefore provides support in
the event of a problem.
The PLC may be used as:
• a fault display unit
• a temperature display unit
• a temperature and fault display unit.
It is located on the front control panel or in the electrical unit.
Fig. 9-11 : Programmable troubleshooting logic controller (front and right view)
(1)
PLC identification
(2)
Main screen display
(3)
A
key, archiving menu (optional)
See section “9.1.14.2 'A' key functions” on
page 66
(4)
B
key, settings menu
See section “9.1.14.3 'B' key functions” on
page 67
(5)
The
ESC
key (red), to exit a menu or cancel
a setting.
After a 30 seconds of inactivity, the PLC
exits a menu automatically.
(6)
-
key: show input and output statuses
See section “9.1.14.4 '-' key functions:” on
page 68
(7)
+
key: show useful information, version and
Marksa SA contact details
See section “9.1.14.5 '+' key functions” on
page 69
Adjustment using '-' or '+' key (in 'B' set-
tings menu).
(8)
OK
(green), used to confirm a setting
(9)
EEPROM cover
+
i1 i2 i3 i4 iB iC iD iE
-
24VDC
RELAY OUPUT 8A
DC INPUT
01
02
03
04
CD12
OK
+
-
ESC
B
A
(5)
(6)
(2)
(1)
(4)
(3)
(8)
(9)
(7)
