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Message
Attachment (Code 52)
Initialization time ex-
ceeded (Code 53)
Transit time not reached
(Code 55)
Pin position/fail-safe
switch (Code 56)
No emergency mode
(Code 76)
Reference test aborted
(Code 81)
Control parameters
(Code 68)
EB 8389S EN
Possible reasons
− Wrong lever mounted.
− Supply pressure too low;
valve cannot be moved to
desired position.
− Nominal range could not
be reached during nomi-
nal range initialization
(NOM).
− Initialization cycle takes
too long (> 90 s). The po-
sitioner returns to its previ-
ous operating mode.
− Supply pressure too low.
Actuator too slow.
− Positioner cannot find
fixed travel/angle stops.
Actuator transit times detect-
ed during initialization are so
short (< 0.3 s) that optimal
positioner tuning is impossi-
ble.
Pin position not entered for
nominal range (NOM) or
substitute (SUB) initialization.
ATO/ATC switch defective.
Positioner detected during ini-
tialization that actuator per-
mits no emergency control
mode without feedback. In
case of a travel sensing error,
positioner vents Output or A1
in double-acting actuators.
Error while the reference
graph 'Drive signal diagram
steady-state (d1)' or 'Drive
signal diagram hysteresis
(d2)' is automatically plotted
during initialization
Error in control parameters.
Recommended action
− Check attachment and
supply pressure.
− Re-initialize positioner.
− Check supply pressure.
− Install a booster.
− Adjust travel/angle
stops.
− Re-initialize positioner.
− Activate volume restric-
tion in positioner out-
put.
− Re-initialize positioner.
− Enter pin position and
nominal range.
− Re-initialize positioner.
Return positioner to
SAMSON for repair.
For your information only.
No further action required.
Check and perform new
reference test, if necessary.
Confirm error. If not suc-
cessful, reset initialization
and re-initialize the posi-
tioner.
Appendix
Status clas-
sification
Single reset
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