31
Master
RSP
LSP
PV
P.I.D.
O/P
Slave
CAS
LSP
PV
P.I.D.
O/P
Software Link
Auto
Auto
Controller 1
Controller 2
Set Point Tracking
(optional)
Master
RSP
LSP
PV
P.I.D. O/P
Slave
CAS
LSP
PV
P.I.D.
O/P
Man
Auto
Software Link
Master
RSP
LSP
PV
P.I.D. O/P
Slave
CAS
LSP
PV
P.I.D.
O/P
Man
Auto
Set Point Tracking
(optional)
Software Link
Master
RSP
LSP
PV
P.I.D. O/P
Slave
CAS
LSP
PV
P.I.D.
O/P
Software Link
Man
Man
Set Point Tracking
(optional)
Set Point Tracking
(optional)
Local Set Point
Selected on Slave
Slave Switched to
Manual Mode
Slave Switched to
Automatic Mode
Cascade Set Point
Selected on Slave
Master Switched to
Automatic Mode
4
CONTROL CONFIGURATION LEVEL…
4.1.2 Cascade Control (with output tracking)
Full Automatic Cascade Control Mode
A ratio and bias can be applied to the
cascade set point (derived from the master
output) to give the required slave set point.
To switch to
Manual Mode
, press the
switch to select manual mode on the slave.
To switch to
Local Set Point Mode
, select local
set point in
Operating Page
of the slave.
Manual Mode
If the slave is switched from automatic
control to manual control, with cascade set
point selected, the set point type
automatically reverts to local, irrespective of
the output tracking setting. The master is
automatically switched to manual control.
Local Set Point Mode
If local set point is selected on the slave
when in
Full Automatic Cascade Mode,
the
master is automatically switched to manual
mode
To return to
Full Automatic Cascade Mode:
press the
switch to select automatic
mode on the slave, select cascade set point
in
Operating Page
of the slave and press the
switch to select automatic mode on the
master.