Emerson Rosemount OCX8800 Instruction Manual page 158

Section 7: Foundation
Fieldbus
April 2017
Index
Parameter Number Units
LO_PRI 52
MATH_FORM 73
MODE_BLK 05
OUT 09
OUT_HI_LIM 28
OUT-LO_LIM 29
OUT_SCALE 11
PV 07
PV_FTIME 16
PV_SCALE 10
RATE 26
RCAS_IN 32
RCAS_OUT 35
RESET 24
ROUT_IN 33
ROUT_OUT 36
SHED_OPT 34
SP 08
SP_FTIME 69
SP_HI_LIM 21
SP_LO_LIM 22
SP_RATE_DN 19
SP-RATE_UP 20
SP_WORK 68
STATUS_OPTS 14
STRATEGY 03
13
2
Description
None The priority of the LO alarm.
None Selects equation form (series or standard).
None The actual, target, permitted, and normal modes of the block.
Target: The mode to "go to"
Actual: The mode the "block is currently in"
Permitted: Allowed modes that target may take on
Normal: Most common mode for target
EU of OUT SCALE The block input value and status.
EU of OUT_SCALE The maximum output value allowed.
EU of OUT_SCALE The minimum output value allowed.
None The high and low scale values, engineering units code, and number of
digits to the right of the decimal point associated with OUT.
EU of PV_SCALE The process variable used in block execution.
Seconds The time constant of the first-order PV filter. It is the time required for a
63 percent change in the IN value.
None The high and low scale values, engineering units code, and number of
digits to the right of the decimal point associated with PV.
Seconds The derivative action time constant.
EU of PV_SCALE Target setpoint and status that is provided by a supervisory host. Used
when mode is RCAS.
EU of PV_SCALE Block setpoint and status after ramping, filtering, and limiting that is
provided to a supervisory host for back calculation to allow action to be
taken under limiting conditions or mode change. Used when mode is
RCAS.
Seconds per repeat The integral action time constant.
EU of OUT_SCALE Target output and status that is provided by a supervisory host. Used
when mode is ROUT.
EU of OUT_SCALE Block output that is provided to a supervisory host for a back calcula-
tion to allow action to be taken under limiting conditions or mode
change. Used when mode is RCAS.
None Defines action to be taken on remote control device time-out.
EU of PV_SCALE The target block setpoint value. It is the result of setpoint limiting and
setpoint rate of change limiting.
Seconds The time constant of the first-order SP filter. It is the time required for a
63 percent change in the IN value.
EU of PV_SCALE The highest SP value allowed.
EU of PV_SCALE The lowest SP value allowed.
EU of PV_SCALE per Ramp rate for downward SP changes. When the ramp rate is set to zero,
second the SP is used immediately.
EU of PV_SCALE per Ramp rate for upward SP changes. When the ramp rate is set to zero,
second the SP is used immediately.
EU of PV_SCALE The working setpoint of the block after limiting and filtering is applied.
None Allows you to select options for status handling and processing. The
supported status option for the PID block is Target to Manual if Bad IN.
None The strategy field can be used to identify grouping of blocks. This data
is not checked or processed by the block.
Instruction Manual
Proportional/ Integral/Derivative (PID) Function
Block
IM-106-880C, OI