Fisher DPR900 User Manual page 43

3-7
3.4.3
D
0 R
LOCAL
COMPUTER
DPR91c-048
3.4.4
r-73
I 4 (Locall
INTERNAL
EXTERNAL
(Remote)
DPR91&@d9
3.4.5
3.5
n
pressing the M button
n
an external signal connected to one of the controller's digital
inputs
n
a signal from a remote computer.
Computer/Local Control
In Computer control, some of the controller's functions are controlled
from a remote computer. In Local control, the front panel controls are
operational.
If the controller is not connected to a remote computer, Local is the
only mode used. If the DPRSOO is connected to a remote computer,
Computer mode is the normal mode of operation.
Switching between Computer and Local control can be done by:
n
pressing the C/L button
n
an external signal connected to one of the controller's digital
inputs
Remote/Local Setpoint
In Remote setpoint, the controller setpoint is taken from an external
source, usually a signal connected to one of the controller's analog
inputs. In Local setpoint, the setpoint is set by the controller's
increase/decrease buttons.
If the controller is not supplied with a remote setpoint signal, Local is
the only mode used. Remote setpoint is blocked by configuration.
Switching between Remote and Local setpoint can be done by:
n
pressing the R button
n
an external signal connected to one of the controller's digital
inputs.
Normal Operating Modes
m Single controller operation -Auto, Local, Extra Internal setpoint
n
Controller with external setpoint signal operation -Auto, Local,
Remote setpoint
m Computer control operation -Auto, Local, Remote setpoint (R
button has no function).
Manual Control of Output Signal
1. Switch to Manual mode by pressing the M button. The yellow
increase/decrease buttons light.
May 1991 lJM6.1:DPR900:9 102