Samson 3730 Series - Page 81

EB 8389-1S EN 81
Partial stroke test (PST)
Table 4: Start options for the partial stroke test (PST)
Type of application
PST start
by
Operating
mode
Rotary pushbut-
ton or operating
software
Test interval
(time-controlled) Set pointw Binary input
See page 73 See page 73 See section12.1 See section12.2
Manual Automatic Automatic Automatic
Control 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