Samson 3731-3 Mounting And Operating Instructions page 5

Modifications to positioner firmware compared to the previous version
1.41 (old) 1.42 (new)
After performing a reset to default values, the allocation of the closing position AIR
TO OPEN (AtO) /AIR TO CLOSE (AtC) is not reset to the default setting. The setting is
kept.
1.42 (old) 1.51 (new)
All EXPERTplus diagnostic functions are available in the positioner without having to
activate them first (refer to EB 8389 on EXPERTplus valve diagnostics)
Optional binary input with following actions:
– Transfer switching state
– Set local operation write protection
– Switch between AUTO/MAN
– Various diagnostic functions (refer to EB 8389 on EXPERTplus valve diagnostics).
The pressure limit (Code 16) is no longer automatically set during initialization.
1.51 (old) 1.52 (new)
Internal modifications
1.52 (old) 1.53 (new)
Internal modifications
1.53 (old) 1.61 (new)
Default values of the step response test have been adapted to the positioner series.
Optimizations made to the step response test.
A positioner not yet initialized generates the NAMUR status "Out of specification"
(previously "Maintenance alarm").
Code 4: the 300 mm setting has been added to the pin positions.
Note:
– The functions of EXPERTplus valve diagnostics are described in the Mounting and Opera-
ting Instructions EB 8389.
Modifications to positioner firmware
5
EB 8387-3 EN