Siemens SIPART PS2 6DR52xx - Manual (Page 129)

Operation
129
SIPART PS2 Manual
A5E00074631--06
Short step zone up
and
Short step zone down
The short step zone is the range of the controller, in which pulse-
shaped excitation signals are output. The pulse length is proportional to
the control deviation. If the control deviation is not within the short step
zone, then the valves are activated in permanent contact.
These two parameters can be set for special applications (see chap-
ter 4.7, page 143).
Current temperature
Current temperature in the positioner housing. The sensor is on the
electronic circuit board.
The temperature display can be switched between _C and _F by
pressing the decrement button.
Minimum temperature (min/max pointer)
and
Maximum temperature (min/max pointer)
The minimum and maximum temperature in the housing interior is
determined continuously in the form of a min/max pointer and saved
and can only be reset at the factory.
Number of operating hours in temperature range T1 to T9
The device gives statistical information as to how long and in which
temperature ranges it was operated. For this purpose, the measured
temperature is averaged for each hour and the counter that is assigned
to the relevant temperature range is incremented every hour. This
allows conclusions to be made about past operating conditions of the
device and the entire control valve.
The temperature ranges are divided as follows:
T1 T2 T3 T4 T5 T6 T7 T8 T9
Temperature
range [_C] ≥--30
≥--30
<--15
≥--15
< 0
≥0
< 15
≥15
< 30
≥30
< 45
≥45
< 60
≥60
< 75
≥75
Number of switching operations pilot valve 1
and
Number of switching operations pilot valve 2
These two counters add up the activation processes of the pilot valves
and are for the assessment of the switching dependency.
26 SSUP
27 SSDN
28 TEMP
29 TMIN
30 TMAX
31 T1 to
39 T9
40 VENT1
41 VENT2