This display allows you to enable or disable the Digital Communications
option using the YES/NO keys when this option is provided. The REM
indicator will flash when digital Communications is active.
3.2 STOP/START CONTROL (Models 2000, 2001 and 2003 Only)
The STOP/START keys allows you to turn the control outputs ON and OFF. This is not a power switch. The controller
electronic circuitry remains powered when the control outputs are turned OFF by this key.
The yellow MAN indicator will flash when the outputs are turned OFF.
3.3 AUTO/MANUAL CONTROL (Models 2002 and 2004 Only)
The AUTO/MANUAL key allows you to take control and manually set the outputs from the keypad.
The OPERATOR loop includes two displays for manual control. These are OUT1 and OUT2 and show output as a %
from 0 to 100% power.
With ON/OFF control the output is either fully ON or fully OFF. With Time Proportional control and analog control
output, the output can be any value from 0 to 100% and can be adjusted to a particular value when in Manual control.
To prevent severe process transients when switching between manual and automatic control, an internal program is
provided that starts the automatic control at the manual setpoint. This means that Time Proportional and analog
controllers will drive to the correct output power at a controlled rate when the PV is inside the proportional band. This
action is called bumpless transfer and protects the process from severe transients during control transfer.
3.4 REMOTE SETPOINT OPTION
A second digit number "1" in the part number indicates that the controller has been specified and manufactured to
accept an analog remote setpoint from an externally mounted potentiometer or remote voltage or current source.
To enable this external input, advance the display in the OPERATOR loop
until this display appears. See OPERATOR loop flow chart in Section 7.2.
Push the YES key to enable the remote setpoint input. The REM indicator will illuminate to confirm that control has
been transferred from the internal setpoint to the external remote setpoint.
To disable this option, return to the REMOTE SETPOINT display and push the NO key.
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