External Start Inputs; Relay Status - Endress+Hauser airtrol CPC 200 Operating Instructions Manual

Fully automatic measuring and calibration system for ph
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6.
Operation
42
6.6

External start inputs

If all relays are closed (no fault present),
then a pulse with a duration of min. 500 ms
is required at the external start input to start
cleaning, HQSS or autocal.
If the start input remains closed, then cleaning,
HQSS or autocal is performed completely.
After water rinse, the function is interrupted
until the start input is opened again.
6.7

Relay status

The relay outputs 7K1, 7K2 and 7K3
(terminals -X1) are status outputs.
The relay 7K4 is used for triggering an
external cleaning pump.
The relay 7K5 is used for triggering
sterilization.
Designation
Measuring mode (no fault present)
Power failure
Rinsing / calibration / maintenance
- Manual operation
- Cleaning cycle (incl. stand by time)
- HQSS cycle
- Autocal cycle
- Refill buffer solution 2
Fault
- Air pressure failure
- Water pressure failure
- Measuring limit position not reached
- Autocal: Measured value unstable
- Autocal: Zero out of range
- Autocal: Slope out of range
- SCS error (software version 2.02 or later)
Legend:
X = independent of relay status
1 = relay closed, contact closed
0 = relay open, contact open
airtrol CPC 200 / 210
In the meantime, the electrode is stored in the
water under safe and optimum conditions.
The following message is displayed:
maintenance input is active
H
assembly is in service position
- - - - - - - - - - - - -
Caution:
For maintenance work at the
assembly, the compressed-air
supply must additionally be
interrupted.
The following table shows the possible status
outputs of relays 7K1, 7K2 and 7K3.
Note:
All relays are closed during
trouble-free operation.
If all relays are open, then this
indicates a power failure.
7K1
7K2
1
0
0
Error no.
X
05
07
06
Error no.
X
01
02
03
04
08
35
34
33
12
13
16
32
Note:
• In case of several error messages,
combinations of the relay statuses
are possible.
• Mycom-specific error messages
are indicated via the alarm relay
of the Mycom.
7K3
1
1
0
0
X
X
0
X
X
0

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