Operation Manual

Continuous valve actuator CHEOPS control
theben
As of: Jul-11 (Subject to change without notice) Page 67 of 71
6.3 Checking end position
The end positions stored during the adaption process can be read out in exactly the same way
as the error numbers using the ETS software.
The internal stop position (spindle inserted, valve open) is stored in Hex-format under the
address $1FC and the external stop position under $1FD.
After downloading the application, these values are reset (i.e. $1FC = 00 and $1FD = FF).
The found stop positions are stored here following successful adaption.
If both addresses show 00 after adaption, the adaption is deemed to have been unsuccessful.
To determine the stop positions in millimetres, the values are converted into decimal and
divided by 20.
Example calculation:
Table 31
Position
Valve
Addres
s
Hexadecimal
Value
Equivalent
to decimal
value
Result
decimal value/20 =
Internal stop
Open
$1FC
24
36
1,8 mm
External stop
Close
d
$1FD
61
97
4,85 mm
The stroke is calculated from the two values as follows:
Stroke = external stop - internal stop
In our example:
Stroke = 4.85 – 1.8 mm = 3.05 mm
Limit values for successful adaption
The following values must be respected:
Table 32
Internal stop
External stop
Stroke
Dimension
Hex value
Dimension
Hex value
Dimension
Hex value
≥
0,3mm
≥
6
≤
7,5mm
≤
96
≥
1.2mm
≥
18