EB 8389-1S EN
81
Partial stroke test (PST)
Table 4:
Start options for the partial stroke test (PST)
Type of appl
icat
ion
PST start
by
Operating
mode
Rotary pushbut
-
ton or operating
software
Test interval
(time-controlled)
Set point w
Binary input
See section 12.1
See section 12.2
Manual
Automatic
Automatic
Automatic
Contr
ol valve
Automatic
mode AUTO
Not possible
Not possible
–
Not possible
Manual mode
MAN
Possible
Not possible
–
Possible
On/off valve
Automatic
mode AUTO
Possible
Possible
Possible
Possible
Manual mode
MAN
Possible
Possible
Not possible
Possible
Triggering event
Code 49 - A0 =
YES or
'Start test'
parameter
activated
'Test interval'
elapsed
Set point is six
seconds long in
the range
between 25 and
50 % of travel
Binary input
changes to ‘Switch
open’ or ‘Switch
closed’ (see ‘Binary
input control’
parameter