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SC2-AT6 – UserManual
Specifications subject to change without notice. | Tox_D_1119, Ex_D_1119, CO2_D_0320 | USA 200413 | Page 11 of 17
7 Troubleshooting
7.1 Indicators at the SC2
The SC2 head does not have diagnostic indicators; messages are relayed from the attached PG2 devices.
7.2 Indicators at the AT6
The 4-20 mA output of the AT6 can be used as diagnostic indicators.
Restart:
Device error:
Tolerable negative sensor drift:
Normal measurement mode:
Tolerable overrange:
Overrange error:
Maintenance message:
7.3 Printed Circuit Board
Trouble
Green LED isn't on.
Green LED doesn't flash.
No measured value at the
Tool or Controller
Message at the Tool /
Controller:
- 24 VDC voltage <range>
- 5 VDC voltage <range>
- Temp. <range>
- WatchDog triggered
7.4 Sensor Cartridge (Messages at the Tool / Controller)
Measuring signal <range>
5 VDC voltage < range >
Temperature < range >
WatchDog triggered
SC Input 1 ≠ stored type
SC Input 2 ≠ stored type
SC Input 3 ≠ stored type
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Output current
1 mA
2 mA
3-4 mA
4-20 mA
20-21 mA
>21 mA
19 mA
Cause
Power voltage not applied
Polarity not correct at X4
Connector X4 not plugged in
Wire breakage
PCB: no address
PCB: no field bus communication
SC not or wrongly plugged in
SC not registered
SC gas type/measuring range doesn't
match with registered ones
Internal error
Internal error
Wrong SC type at input 1
Wrong SC type at input 2
Wrong SC type at input 3
Solution
Measure tension at X4:
(16-28 V DC) Pin 1 (+) and 2 (-)
Connect correctly
Check the plug
Check the wiring
Check PCB address, address correctly
Check field bus wiring, topology and
termination
Check SC plug
Register SC
Check SC data<> registration data for
conformity
Replace PCB
Replace SC
Check SC at input 1, replace it
Check SC at input 2, replace it
Check SC at input 3, replace it
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