SMC Networks IP8001 Series Operation Manual page 40

Error display Type of error
Hunting detected
Hunting
Hunting detected
Hunting2
Balance
adjustment failure
Balance Current
Hunting is not focused.
Hunting
Time Out
Balance
confirmation failure.
Time Out
Possible cause
- Actuator size is small
- Piping has orifice(speed
controller) etc.
- Actuator size is small
current - Balance current adjustment
condition is not optimum
- For possible causes, countermeasure of positioner side, and 375/475 field communicator, refer
error display "Hunting" .
current - Easy balance adjustment is
not performed.
Countermeasure of
positioner
- No action necessary
- Verify the actuator size
again
- Remove the orifice in piping
- No action necessary
- Adjust the balance adjusting
screw (See Fig. 9) so that
the balance current on the
display becomes "0".
- Adjust the balance adjusting
screw by easy balance
adjustment
3939
Countermeasure of 375/475
field communicator
- Switch to auto mode to change
the input current in order to
confirm the hunting of the
actuator. If hunting is present,
focus it by PID adjustment.
Refer operation manual of
basic type("Improved
Controllability" of Doc. No.:
IP8S-OM00009).
- Calibrate with "Full Calibration"
after performing
countermeasure of the
positioner.
- Switch to auto mode to change
the input current in order to
confirm the hunting of the
actuator. If hunting is present,
focus it by PID adjustment.
Refer operation manual of basic
type("Improved
Controllability" of Doc. No.:
IP8S-OM00009). If there is
no hunting, PID adjustment
is not necessary. Regardless
of PID adjustment, check
the balance current (5-5-7).
"PID+BC
- Calibrate with
adjustment" after performing
countermeasure of the
positioner.
- Calibrate with "Full Calibration"
after performing
countermeasure of the
positioner.
No.IP8S-OM00013
A