Partlow MRC 7000, Installation & Operation Manual

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3.5.2 KEYPAD CONTROLS
The keys provided on the keypad and their functions include:
SCROLL: Used to : Advance the display through the enabled modes.
While in a mode, used to sequence the parameter codes and
values. Exit some Test and Calibration functions.
Work in conjunction with other keys.
UP: Used to: Exit a mode.
Turn a mode On in the Enable mode.
Increase a numerical value
Work in conjunction with other keys.
Display the setpoint (Limit device only).
Increase the setpoint (Limit device only).
DOWN: Used to: Enter a mode
Turn a mode Off in the Enable mode
Decrease a numerical value
Work in conjunction with other keys.
Display the setpoint (Limit device only).
Decrease the setpoint (Limit device only).
RESET: Used to: Reset the limit output only when the condition that caused the
(Limit Only) limit has been cleared.
LAMP TEST
From the Off or Control modes, all display and status LEDs can be illuminated simultaneously
by depressing the UP and DOWN keys at the same time. Any defective LEDs will not light.
CHANGE CHART (also see Changing Charts, Section 4.2)
If the UP and DOWN keys are held depressed for more than 2 seconds but less than 4
seconds, the display will show Cchg momentarily. The pen(s) will move to and remain at a
point above the top graduation on the chart and the chart will stop rotation to allow the chart to
be changed. The pens will remain fully upscale with the chart OFF; otherwise, the unit will
continue to operate normally in the current mode. To restore pen(s) position and chart
rotation, press the UP and DOWN keys for more than 2 seconds but less than 4 seconds.
PEN RESYNCHRONIZATION
To resynchronize the pen(s), depress the UP and DOWN keys for 4 seconds, the display will
show P dn momentarily, the pen(s) are driven to the "Pen Home" position below the bottom
graduation on the chart while the unit resynchronizes their position. After about 14 seconds,
the pen(s) will return to their correct position. All other functions of the unit's present mode
continue to operate normally.
3.5.2.1 OFF MODE
When in the Off Mode, all outputs and alarms are off. The chart (if selected) may stop
rotating. To exit the Off mode, press the SCROLL key until OPEr is displayed, then press the
DOWN key.
3.5.2.2 ENTERING THE ENABLE MODE
The Enable mode is entered by pressing and holding the UP and DOWN keys simultaneously
while in the Operate or Off modes. Holding the two keys depressed for 10 seconds will cause
the display to show the EnAb prompt which is the entry point into the Enable mode.
A hardware jumper located on the Processor Board (See Appendix A-1, page 50) can be used
to lock/unlock the Enable mode. When the jumper is moved to the locked position, entry into
the Enable mode is not possible until the jumper is moved to the unlock position.