Festo 542897 - Page 36

SDE5−...
Festo SDE5−... 0609a English
36
b) Switching pressure setting on the SDE5−...−FP−... :
Please note
The sequence of the teach pressures for the switching pressure setting affects
the switch element function (normally−closed/normally−open) of the
SDE5−...−FP−....
S Consider the following relationship:
TP1 < TP2: Programming as normally−open (NO)
TP1 > (TP2 + 2 % full scale): Programming as normally−closed (NC)
Switch element function NO
(TP1 < TP2)
Switch element function NC
TP1 > (TP2 + 2 % FS)
Mode 1:
Threshold
value
comparator
P
1
0
OUT
SPTP1 TP2
Hy
P
1
0
OUT
SPTP2
TP1
Hy
Mode 2:
Hysteresis
comparator
P
Hy
SP=TP2TP1
1
0
OUT
P
Hy
SP=TP1TP2
1
0
OUT
Mode 3:
Window
comparator
P
1
0
OUT
SP
min
SP
max
=TP1 =TP2
Hy
Hy
P
1
0
OUT
SP
min
SP
max
=TP2 =TP1
Hy
Hy
Fig.20
1. Note the teach pressures TP1 and TP2, taking the above instruction into
consideration.
2. Pressurize the SDE5−... with the first teach pressure (TP1).
3. Press the EDIT button 1 until the LED starts to flash (longer than 2 s).
When the button is released, the SDE5−... saves the first teach pressure.
The LED then
continues to flash.