Instruction Manual

Instruction Manual
D103434X012
Blocks
November 2014
94
Table B‐12. PID Function Block System Parameters Definitions (Continued)
DescriptionInitial ValueRange
Block
Mode
RO /
RW
Index
Number
Label
PARAMETER_NAME
Balance Time
BAL_TIME
25 ALL Positive 0
Data Type: Float
The specified time, in seconds, for the internal
working value of bias to return to the operator set
bias. Also used to specify the time constant at
which the integral term will move to obtain
balance when the output is limited and the mode
is AUTO, CAS, or RCAS.
Rate
RATE
26 ALL Positive 0
Data Type: Float
The derivative action time constant, in seconds.
Back Calculation Input
BKCAL_IN
27 ALL
Status
BAD:
NC:
const
Data Type: DS‐65
The analog input value and status from another
block's BKCAL_OUT output that is used for
backward output tracking for bumpless transfer
and to pass limit status.
Value 0
Output High Limit
OUT_HI_LIM
28 ALL OUT_SCALE +/‐ 10% 100
Data Type: Float
Limits the maximum output value for modes other
than manual.
Output Low Limit
OUT_LO_LIM
29 ALL OUT_SCALE +/‐ 10% 0
Data Type: Float
Limits the minimum output value for modes other
than manual.
Back Calculation Hysteresis
BKCAL_HYS
30 ALL 0 to 50% 0.50%
Data Type: Float
The amount the output value must change away
from the its output limit before limit status is
turned off.
Back Calculation Output
BKCAL_OUT
31 RO NA Dynamic
Data Type: DS‐65
The value and status required by the BKCAL_IN
input of another block to prevent reset windup
and to provide bumpless transfer of closed loop
control.
Remote Cascade Input
RCAS_IN
32 ALL
Status
BAD:
NoCom:
NoVal:
const
Data Type: DS‐65
Target setpoint and status that is provided by a
supervisory host. Used when mode is RCAS.
Value 0 Trk
Remote Out Input
ROUT_IN
33 ALL
Status
BAD:
NoCom:
NoVal:
const
Data Type: DS‐65
Target output and status that is provided by a
supervisory host. Used when mode is ROUT.
Value 0 Trk
Shed Options
SHED_OPT
34 ALL
0=Invalid
1=Normal Shed, Normal
Return
2=Normal Shed, No Return
3=Shed to Auto, normal
return
4=Shed to Auto, no return.
Target mode changes to
Auto on detection of a shed
condition
5=Shed to Manual, normal
return
6=Shed to Manual, No
return. Target mode
changes to MAN on
detection of a shed
condition.
7=Shed to retained target,
normal return
8=Shed to retained target,
no return. (Change target to
retained target)
0=Invalid
Data Type: Uint8
Defines action to be taken on remote control
device timeout.
Normal Return ‐ actual mode changes to the next
lowest priority non‐remote mode permitted but
returns to the target remote mode when the
remote computer completes the initialization
handshake.
No Return ‐ Target mode changes to the next
lowest priority non‐remote mode permitted. The
target remote mode is lost, so no return occurs.
-Continued-