User guide

4 OPERATION
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UFC 400
www.krohne.com 05/2013 - 4002813701 - AD FF UFC 400 R01 en
FF_GAIN
FF_GAINFF_GAIN
FF_GAIN
Feed Forward Gain
Feed Forward GainFeed Forward Gain
Feed Forward Gain
R/W The gain that the feed forward input is multiplied by before it
is added to the calculated control output.
0
FF_SCALE
FF_SCALEFF_SCALE
FF_SCALE
Feed Forward
Feed Forward Feed Forward
Feed Forward
Scale
ScaleScale
Scale
R/W The feed forward input high and low scale values, engineering
units code and number of digits to the right of the decimal
point.
-
EU at 100% R/W The engineering unit value which represents the upper end of
range of the associated block parameter.
100
EU at 0% R/W The engineering unit value which represents the lower end of
range of the associated block parameter.
0
Units Index R/W Device Description units code index for the engineering unit
descriptor for the associated block value.
Uninitialized
Setting:
All units are possible.
FF_VAL
FF_VALFF_VAL
FF_VAL
Feed Forward
Feed Forward Feed Forward
Feed Forward
Value
ValueValue
Value
R The feed forward value and status. -
Status R Status of FF_VAL -
Value R Value of FF_VAL -
GAIN
GAINGAIN
GAIN
Gain
GainGain
Gain
R/W Dimensionless value used by the block algorithm in
calculating the block output.
0
GRANT_DENY
GRANT_DENYGRANT_DENY
GRANT_DENY
Grant Deny
Grant DenyGrant Deny
Grant Deny
R/W Options for controlling access of host computers and local
control panels to operating, tuning and alarm parameters of
the block.
-
Grant R/W Depending on the philosophy of the plant, the operator or a
higher level device (HLD), or a local operator's panel (LOP) in
the case of Local, may turn on an item of the Grant attribute -
Program, Tuning, Alarm or Local.
No option selected
Setting:
• Program: Host may change mode, setpoint or output of block
• Tune: Host may change the tuning parameters of block
• Alarm: Host may change the alarm parameters of block
• Local: A local panel or handheld device may change the
target mode, setpoint or output
Deny R/W The "Denied" attribute is provided for use by a monitoring
application in an interface device and may not be changed by
an operator.
No option selected
Setting:
• Program denied: Granting of program permission has been
reset
• Tune denied: Granting of tune permission has been reset
• Alarm denied: Granting of alarm permission has been reset
• Local denied: Granting of local permission has been reset
HI_ALM
HI_ALMHI_ALM
HI_ALM
High Alarm
High AlarmHigh Alarm
High Alarm
Mix The status for High Alarm and its associated time stamp. -
Unacknowledged R/W A discrete enumeration which is set to "Unacknowledged"
when an alarm occurs, and set to "Acknowledged" by a write
from a human interface device or other entity which can
acknowledge that the alarm/event has been noticed.
Uninitialized
Setting:
Uninitialized / Acknowledged / Unacknowledged
Parameter
ParameterParameter
Parameter
DD name
Access Description and settings Initial Value