Process Control Instructions
Rockwell Automation Publication 1756-RM006K-EN-P - November 2018 189
CVEUMin REAL Minimum value of CVEU. The value of CVEU
that corresponds to 0% CV. If CVEUMax =
CVEUMin, set bit in Status.
Valid = any float
Default = 0.0
CVHLimit REAL CV high limit value. This is used to set the
CVHAlarm output. It is also used for
limiting CV when in Auto or CascadeRatio
modes or Manual mode if CVManLimiting
is TRUE.
If CVLLimit < 0, if CVHLimit > 100, if
CVHLimit < CVLLimit, set bit in Status. If
CVHLimit < CVLLimit, limit CV by using the
value of CVLLimit.
Valid = CVLLimit < CVHLimit
≤ 100.0
Default = 100.0
CVLLimit REAL CV low limit value. This is used to set the
CVLAlarm output. It is also used for limiting
CV when in Auto or CascadeRatio modes or
Manual mode if CVManLimiting is TRUE.
If CVLLimit < 0, if CVHLimit > 100, if
CVHLimit < CVLLimit, set bit in Status.
If CVHLimit < CVLLimit, limit CV by using
the value of CVLLimit.
Valid = 0.0 ≤ CVLLimit <
CVHLimit
Default = 0.0
CVROCPosLimit REAL CV increasing rate of change limit, in
percent per second.
Rate of change limiting is only used when
in Auto or CascadeRatio modes or Manual
mode if CVManLimiting is TRUE.
A value of zero disables CV ROC limiting.
If value of CVROCPOSLimit < 0, set bit in
Status and disable CV ROC limiting.
Valid = 0.0 to maximum
positive float
Default = 0.0
CVROCNegLimit REAL CV decreasing rate of change limit, in
percent per second.
Rate of change limiting is only used when
in Auto or CascadeRatio modes or Manual
mode if CVManLimiting is TRUE.
A value of zero disables CV ROC limiting.
If value of CVROCNegLimit < 0, set bit in
Status and disable CV ROC limiting.
Valid = 0.0 to maximum
positive float
Default = 0.0
HandFB REAL CV HandFeedback value. CV set to this
value when in Hand mode and
HandFBFault is FALSE (good health). This
value would typically come from the
output of a field mounted hand/auto
station and would be used to generate a
bumpless transfer out of Hand mode.
If value of HandFB < 0 or > 100, set unique
Status bit and limit value used for CV.
Valid = 0.0…100.0
Default = 0.0
HandFBFault BOOL HandFB value bad health indicator. If the
HandFB value is read from an analog input,
then HandFBFault will normally be
controlled by the status of the analog input
channel.
If HandFBFault is TRUE, it indicates an error
on the input module, set bit in Status.
Default = FALSE
FALSE = Good Health