KROHNE H250 M40 FOUNDATION FIELDBUS - Manual (Page 65)

OPERATION
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H250 M40
www.krohne.com 02/2014 - 4001208201 - AD H250 M40 FF R02 en
Value R The value of the associated parameter at the time the alert
was detected.
0
Setting:
0...255
DV_LO_LIM DV_LO_LIM DV_LO_LIM DV_LO_LIM
Deviation Low Deviation Low Deviation Low Deviation Low
Limit Limit Limit Limit
RW The setting of the low deviation alarm limit in engineering
units.
-INF
DV_LO_PRI DV_LO_PRI DV_LO_PRI DV_LO_PRI
Deviation Low Deviation Low Deviation Low Deviation Low
Priority Priority Priority Priority
RW Priority of the low deviation alarm. 0
Setting:
0...15
FF_GAIN FF_GAIN FF_GAIN FF_GAIN
Feed Forward Gain Feed Forward Gain Feed Forward Gain Feed Forward Gain
RW The gain that the feed forward input is multiplied by before it
is added to the calculated control output.
0
FF_SCALE FF_SCALE FF_SCALE FF_SCALE
Feed Forward Feed Forward Feed Forward Feed Forward
Scale Scale Scale Scale
RW 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% RW The engineering unit value which represents the upper end of
range of the associated block parameter.
100
EU at 0% RW The engineering unit value which represents the lower end of
range of the associated block parameter.
0
Units Index RW Device Description units code index for the engineering unit
descriptor for the associated block value.
Uninitialized
Setting:
All units are possible.
FF_VAL FF_VAL FF_VAL FF_VAL
Feed Forward Feed Forward Feed Forward Feed Forward
Value Value Value Value
R The feed forward value and status.
Status R Status of FF_VAL
Value R Value of FF_VAL
GAIN GAIN GAIN GAIN
Gain Gain Gain Gain
RW Dimensionless value used by the block algorithm in
calculating the block output.
0
GRANT_DENY GRANT_DENY GRANT_DENY GRANT_DENY
Grant Deny Grant Deny Grant Deny Grant Deny
RW Options for controlling access of host computers and local
control panels to operating, tuning and alarm parameters of
the block.
Grant RW 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 RW 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
Proportional Integral Derivative Block
Parameter
DD Name Access Description
settings Initial Value
AD_H250_M40_FF_R02_en_4001208201_PRT.book Page 65 Friday, February 21, 2014 11:25 AM