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Configuration, Startup, and Operation
of Recorder with Display
12/03 DR4300 Circular Chart Recorder Product Manual 133
4.5.2.2 Changing Control Mode and Adjusting Output Manually
Available modes
The recorder can operate in one of two modes.
• Manual: When switched to manual mode, the recorder holds its output at the last value used during
automatic operation and stops adjusting the output for changes in process variable. In manual, the
operator uses the keypad to adjust the output by changing the value shown in the upper display.
If the switch to manual is the result of an input failure sending the channel to failsafe operation, the
output value displayed when the controller first switches to manual will be the value of the “FAILSF”
parameter in the control set up group. This “FAILSF” value is expressed as a percentage. The output
can be any value between 0 % and 100 %.
• Automatic with Local Setpoint: In automatic local mode, the recorder uses the local setpoint and
automatically adjusts the output to maintain the setpoint at the desired value. In this mode you can
adjust the setpoint as described in Subsection 4.5.2.3.
Procedure for selecting manual or automatic mode
Table 4-29 includes procedures for selecting automatic or manual mode, and for changing the output while
in manual.
Table 4-29 Procedure for Selecting Automatic or Manual Mode
Step Operation Press Action/Result
1
Selecting automatic
mode
MAN
AUTO
RESET
Until “A” indicator is ON.
The recorder regulates its output to maintain the PV at
the desired setpoint.
2
Selecting manual
mode
MAN
AUTO
RESET
Until “M” indicator is ON.
The recorder holds its output at the last value used
during automatic operation and stops adjusting the
output for changes in setpoint or process variable.
• If you get a “KEYERR” prompt, be sure control has
been enabled through configuration as described
earlier in this section.
3
Adjust the output in
manual mode
or
Adjust the output value while in manual mode.
Upper Display
shows the input value.
Lower Display
shows OT and the output value
in % for the selected channel.
4
Return to automatic
mode
MAN
AUTO
RESET
“A” indicator appears indicating automatic mode.