Festo CMSH - Permanent control deviation; PST stopped: Tolerated deviation of starting position exceeded

70
Festo — CMSH — 2021-10
Malfunctions
ID Message NAM
UR
1)
Possible cause Notes/remedies
1034 Permanent control
deviation
2)
–
Set threshold value
exceeded
–
Increased friction due to
wear on the drive or
process valve
–
Unsuitable threshold value
–
Service the drive or
process valve and replace
if necessary.
–
Adjust the threshold value
and check the deadband
of the closed-loop con-
troller.
1082 PST stopped: Toler-
ated deviation of
starting position
exceeded
2)
–
Drive outside the specified
range at PST start
–
Move drive into permitted
position range before PST
start.
–
If necessary, adjust values
of the tolerance start posi-
tion (Tol_start).
1083 PST stopped: Toler-
ated deviation of
external target posi-
tion exceeded
2)
–
Setpoint position at PST
start outside the specified
range
–
Move setpoint position
into permitted range
before PST start.
–
If necessary, adjust values
of tolerance of external
setpoint position (Tol_ext).
1084 PST stopped: Too
long duration of
movement from x2 to
x1 compared to refer-
ence
2)
–
Increased friction with
drive or process valve
–
Low supply pressure
–
Increased resistance in the
compressed air lines
–
Wear of the positioner
–
Service the drive or
process valve and replace
if necessary.
–
Check supply pressure.
–
Check compressed air
lines.
–
Replace positioner.
1085 PST stopped: Total
duration too long
compared to refer-
ence
2)
–
Increased friction with
drive or process valve
–
Low supply pressure
–
Increased resistance in the
compressed air lines
–
Wear of the positioner
–
Service the drive or
process valve and replace
if necessary.
–
Check supply pressure.
–
Check compressed air
lines.
–
Replace positioner.