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FRONT PANEL OPERATION
The front panel of the 090 series consists of a three or four digit numeric LED display, and two
momentary push button switches labeled 'UP' and 'DOWN'. In normal operation the current
process value is displayed.
Several other parameters can be displayed, depending on the operating modes as described
below. Whenever a parameter other than the current process value is first displayed, it is
annunciated by a two letter code displayed for several seconds before the parameter's value is
displayed.
Start up
Whenever power is first applied to the controller, its firmware version data is displayed as three
separate numbers, each preceded by an identifying quasi-alpha string as shown in the table
below.
After these values are displayed, the controller begins operation in normal operation mode as
described below.
Normal Operation
In this mode the display shows the current process value. The display intensity is steady and at
most a single decimal point is illuminated. The controller always returns to this mode from any
other mode after approximately five seconds of no front panel button activity.
If over/under alarms are enabled and the process value is in either over or under alarm the
display will alternate between showing either 'HI' or 'LO' (depending on process value) and the
actual process value. When in alarm, the audible beeper will also sound if installed.
Viewing and Modifying the Setpoint
The current setpoint can be displayed by momentarily pressing and releasing either the 'UP' or
'DOWN' button. The display briefly shows 'SP' to annunciate the value about to be displayed,
then shows the setpoint value.
Whenever the setpoint value is showing, the display blinks. While the setpoint value is blinking
its value can be adjusted with the 'UP' and 'DOWN' buttons.
The controller automatically stores the current display value as the new setpoint and reverts to
Normal Operation mode after approximately five seconds of no front panel button activity.
2/21/05
SUNSTAR自动化 http://www.sensor-ic.com/ TEL: 0755-83376489 FAX:0755-83376182 E-MAIL: szss20@163.com
090 Series Reference Manual
Identifier
Firmware type number
SN1
Firmware major version number
Sn2
Firmware minor version number
Sn3
Table 1: Version Number Display Annunciation.
Digital Control Systems
Meaning
Page: 3
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