Supplementary Documentation
Page 16 of 44
IFC090, IFC090 i with FF
IFC090-FF Block Description
IFC090 FF 01/2005
KROHNE Messtechnik GmbH & Co. KG · Ludwig-Krohne-Str. 5
D-47058 Duisburg
Tel.: 0203-301 309
Fax: 0203-301389 · E-mail: [email protected]
Parameter
Access
Description
ST_REV R
Static data revision counter. ST_REV will be incremented if a static
Transducer Block parameter has changed. By checking this parameter,
control systems are able to realize if a static parameter has changed its
value without checking all static parameters all the time.
STRATEGY R/W
Parameter used to group a set of blocks. This is done by assigning all blocks
belonging to one group the same STRATEGY numerical value.
NOTE:
This parameter is neither checked nor used by the function block application!
It can be used by control system to group blocks!
TAG_DESC R/W
User description of the intended application of the block. The user is free in
setting this value. The only limitation is the length of 32 characters at
maximum. It is not checked by the application, but has informational
character only.
TRANSDUCER_DIRECTOR
Y
R
Directory that specifies the number and starting indices of the transducers in
the transducer blocks.
Since the IFC090-FF possesses only one transducer, the directory consists
of one entry only (1 = number of transducers, 711 = starting index of the only
transducer).
UPDATE_EVENT R
Alert generated by a change to static data. The subfields of this parameter
give detailed information about the changed static parameter, time of change
and state of the update event.
XD_ERROR R
Error code that is specific to the sensor hardware. If a profoundly hardware
error is existent, this parameter shows the error ‘Electronics failure’ (20).
4.3
Analog Input Block (Flow)
Table 3 lists the Analog Input Block parameters in alphabetical order (this list gives a description of the various
parameters only; see chapter below for a detailed description of how to configure these parameters):
Parameter
Access
Description
ACK_OPTION R/W
Allows to enable automatic acknowledge of Analog Input Block alarms. The
following settings are valid for Resource Block:
Unack Alarm 1 (Discrete Alarm)
clearing of soft write lock
Unack Alarm 2 (High High Alarm)
OUT value reaches the HI_HI_LIM
Unack Alarm 3 (High Alarm)
OUT value reaches the HI_LIM
Unack Alarm 4 (Low Low Alarm)
OUT value reaches the LOW_LOW_LIM
Unack Alarm 5 (Low Alarm)
OUT value reaches the LO_LIM
Unack Alarm 8 (Block Alarm)
block mode switches to Out of Service
If set, the respective alarm don’t has to be acknowledged on occurence
see also:
ALARM_SUM
ALARM_HYS R/W
Amount the
OUT
value must return within the alarm limits before the alarm
condition
(HI_HI_ALM; HI_ALM, LO_ALM, LOW_LOW_ALM)
clears.
Alarm Hysteresis is expressed as percent of the
OUT_SCALE
span and is
set 0.5% by default.
