Tracking Signal Selector (Option 3 - Fisher DPR900 User Manual

Confiauration
5-38A
Change 1 -September 1991
Tracking Signal Selector (Option 3)
Output tracking option 3 is used when the controller is configured
to
be used as a remotely controlled output tracking controller. This
occurs when a second signal received at Al4 is to be passed directly
through the DPRSOO and used as the output signal to the final control
device. As illustrated, when the discrete input signal is active, the
controller takes the analog signal at Al4 and retransmits it directly
through analog output A01 to the control valve. With this selection
active, internal output signal tracking is automatically achieved for the
internal loop.
Option 3 should be selected when a remote analog signal is to be
retransmitted through the controller to the final control device based
on a discrete switching signal. The controller's output signal can be
made to track a given analog input signal connected to Al4, providing
output tracking when the discrete is active.
When output tracking is enabled, the output signal at A01 = (A14 +
delta U). Delta U is defined as the contribution from the controller
during regulation (max f 10%).
The user selects this function with FCODE 115, Option 3. The
controller will track only when the controller is in the AUTO mode and
the discrete input at DII is active. If the controller is in the MANUAL
mode, the discrete input has no effect on the controller switching
action and the controller remains manually adjustable.
The output tracking function cannot be used with positioning motor
(raise/lower) pulse outputs,
Tracking; Sigh S&to; (Al4) 4
Min selection enabled 5
Max selection enabled 6
UM6.1:DPR900'9102