914660330020
2017-11-24·HB00·III·en·00
Parameterization and Commissioning
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Frequency Transmitter
Field Circuit Ex i
Series 9146
9.2.5 Limit Value Setting (via "ISpac Wizard" Software)
The limit value function is configured by means of the "ISpac Wizard" software.
The following representation shows possible adjustments of the limit value contacts
for relays A and B. This is an example, other assignments also being possible.
06882E01
In case of a detected line fault, the limit value relays adopt the set operating direction,
for example, in case of "Off above limit value", the relays drop out. This is the
recommended setting for safety-related circuits.
9.2.6 Anti-Pumping Device (via "ISpac Wizard" Software)
The anti-pumping device is configured using the "ISpac Wizard" software. If a limit value
is reached, the anti-pumping device ensures that the limit value contact remains in
working position even if the process variable that caused the response is no longer
effective. This function is used to ensure that the personnel does not overlook when
the value has exceeded or fallen below the limit values.
Selection
Description
"Deactivated"
Default adjustment - function is off
"Activated"
Function as described above. When the event occurs, the set operating
mode ("ON" or "OFF") does not change. The anti-pumping device remains
active even after power supply interruption. The anti-pumping device is only
reset if the DIP switch "LF1" or "LF2" (OFF-ON-OFF or ON-OFF-ON)
at the front panel is actuated.
If, at the same time, an error occurs, the limit value relays switch to the
ON position (example: "On above limit value" -> in case of error: ON).
Set-up in the ISpac Wizard:
„
c
l
oses if
va
l
ue
> l
imit
va
l
ue
“
„
opens if
va
l
ue
> l
imit
va
l
ue
“
„
c
l
oses if
va
l
ue
< l
imit
va
l
ue
“
„
opens if
va
l
ue
< l
imit
va
l
ue
“
L
imit
va
l
ue
A
L
imit
va
l
ue
A
-
Hysteresis
L
imit
va
l
ue B
+
Hysteresis
L
imit
va
l
ue B
t
