view user manual (pdf) - dyna-flo control valves

Operation
Error Event
code
1 Remaining control
error
2 Instrument not
in automatic
mode
3 Digital input DI1
or DI2 active
4 Limit value
Number of strokes
exceeded
5 Limit value
change of direction
exceeded
6 Limit value bottom
hard stop
exceeded
7 Limit value
top hard stop
exceeded
8 Limit value
dead zone
adaptation exceeded
Table 4-2
Parameter
setting
always active
47. FCT= nA
or = nAB
47. FCT= nAB
and digital function
BIN1 or BIN2 to
”on”
Fault message disappears
when ...
... the control error has
disappeared again
... the instrument is
brought into automatic
mode
... the digital input is no
longer activated
50. STRK¸OFF ... the stroke counter is
reset or the limit value
increased
51. DCHG¸OFF ... the change of direction
counter is reset or the limit
value increased
52. ZERO¸OFF
39.YCLS = do or
up do
53. OPEN¸OFF
39 YCLS = up or
up do
54. DEBA¸OFF
34.DEBA = Auto
... the deviation of the stop
disappears or the
instrument is re--initialized
... the deviation of the stop
disappears or the
instrument is re--initialized
... the limit value is
dropped below again
Events which can activate the fault message output
Possible causes
Compressed air missing,
actuator fault, valve fault
(e.g. blockade).
The instrument is configured
or is in manual operation.
The contact connected to
the binary input has become
active (e.g. stuffing box
monitoring, excess
pressure, temperature
switch).
The total distance traveled
by the actuator exceeded
the set limit value.
The number of changes of
direction exceeded the set
limit value.
Wear of the valve seat, deposits
or foreign bodies in
the valve seat, mechanical
maladjustment, slip clutch
maladjusted.
Wear of the valve seat, deposits
or foreign bodies in
the valve seat, mechanical
maladjustment, slip clutch
maladjusted.
Increased stuffing box
friction, mechanical lots of
the position feedback
Explanations of column “Error codes”:
1 Monitoring of control error
In automatic operation the error between setpoint and actual value is
monitored continuously. The fault message is activated with unchanged
control error according to the setting of the parameters 48. TIM, monitoring
time for setting the fault messages and 49 LIM, response threshold
of the fault message. As soon as the control error drops back below
the response threshold, the fault message is reset.
2 Monitoring automatic operation
A fault message is generated when the instrument is not in the automatic
mode at the appropriate parameter setting “47. FCT”. In this way
the control system can be warned for example when the instrument has
been switched to manual operation or Configuration on site.
104
SIPART PS2 Manual
A5E00074631-03