Table of Contents
Advertisement
MODE_BLK
Index: 5
Access: r, w
Display:
OUT
Index: 9
Access: r, w in MAN, O/S
PV
Index: 7
Access: r
PV_SCALE
Index: 11
Access: r, w in MAN, O/S
Default:
RCAS_IN
Index: 26
Access: r, w
N
Shows the actual mode of the AO Block, the target modes, permitted modes supported
by the AO Block and normal mode.
RCAS
CAS
AUTO
MAN
O/S
The AO Block supports the following modes:
O/S (Out of Service)
The AO algorithm of the block is not executed. The last value or the value
determined during active fault state handling is issued at the OUT parameter.
MAN (Manual)
The output value of the AO Block can be directly preset by the user over the
OUT parameter.
AUTO (Automatic)
The set point preset by the user is used on executing the AO Block via the
SP parameter.
CAS (Cascade)
The AO Function Block receives the reference variable for internal calculation
of the manipulated variable directly from an upstream connected Function
Block via CAS_IN. The AO Block is executed.
RCAS (Remote cascade)
The AO Function Block receives the reference variable for internal calculation
of the manipulated variable directly from the fieldbus host system via
CAS_IN. The AO Block is executed.
N
Shows the manipulated variable, value, limit and status of the AO Function Block.
Note: If the MAN mode in MODE_BLK is selected, the output value OUT can be
entered manually here. The unit used is taken over by the XD_SCALE parameter
group. The input range corresponds to OUT_SCALE ±10 %.
D
Shows the process variable including status used for the function blocks. The unit used
is taken over by the PV_SCALE parameter group.
Note: If the option OUT READBACK in FEATURES_SEL in the Resource Block is
activated, PV contains the current valve stem position (corresponding to
FINAL_POSITION_VALUE).
S
Definition of the range (lower range and upper range value), engineering unit and
number of digits behind the decimal place of the process variable (PV).
0...100 %
N
Shows and used to input the analog reference variable (value and status) provided by
the fieldbus host system and used as the set point to calculate the manipulated variable.
Note: This parameter is only active in RCAS mode.
Parameter description
61
EB 8383-1 EN
Advertisement
Table of Contents
