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Auto Tuning
Value
Comment
Travel calibration with step by
7
step (for very large valve)
255
Self-check only
The result of auto tuning, which is written to AUTO_TUNE_RESULT, may be an error or
warning. Any error invalidates the tuning and does not update the parameter settings.
Table 35 AUTO_TUNE_RESULT & TRAVEL_CALIB_RESULT
Value
Comment
1
Succeeded
2
Cancelled
Exhaust air pressure
21
warning
Small supply air pressure
22
warning
Large supply air pressure
23
warning
40
Offset drift warning
Large Response speed
42
warning
43
Large hysteresis warning
44
Large slip width warning
60
Small angle span warning
Large angle span warning
61
Table 34 Types of Auto Tuning (Continued)
Step-by-step travel calibration at the tight-shut and full-open
positions
Execution of self-diagnostics only (without parameter tuning)
Auto Tuning sets the 0% point at the position where the
NOTE
valve is fully closed and 100% point at the position where
the valve stem stops against the mechanical stopper (fully
open). If it is necessary to adjust the zero point and span
precisely to the rated stroke of the valve, carry out travel
calibration.
Error
/Warning
(*2)
—
—
W
W
W
W
W
W
W
W
W
Description
Auto tuning/Travel calibration has succeeded.
Auto tuning has been canceled.
The measured exhaust pressure exceeds ±60 kPa.
The measured supply air pressure is less than 100 kPa.
The measured supply air pressure is greater than 800 kPa.
The offset falls outside the normal operation range.
Waiting time for measuring time > 40 seconds.
Hysteresis > 30%
Slip width > 5%
Rotation-angle span < 15°.
VALVE_TYPE is linear and the rotation-angle span exceeds
55°; or VALVE_TYPE is rotary and the rotation-angle span
exceeds 95°.
127
Transducer Block
Description
- Quick Links:
- Operation
- Installation
- Maintenance
- Travel Calibration
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