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GETTING STARTED
XI581/2 BUSWIDE OPERATOR INTERFACE
EN2B-0126 (74-3554-8)
8
To enable the buswide alarm flag, set the XI581/2 to Alarm Standby Flag mode in
the 'Buswide Access' screen. To enable receiving of buswide alarms, set the
XI581/2 to 'Alarm Standby On'. The "Alarm Information" section describes these
options.
When alarm standby is on and the alarm flag enabled, a screen symbol starts
flashing as soon as a new buswide alarm arrives from somewhere on the system
bus.
NOTE:
Local alarms will not show when you are logged in to a remote controller.
The reading of a buswide alarm from an XI581/2 is independent of the XBS/XBS-i
mechanism for alarm acknowledgment.
Performance
Only one buswide XI581/2 (local or remote) can be logged onto a controller at any
one time. However, there is no restriction as to the total number of buswide XI581/2
used on the same system bus. When XBS PCs are also on the bus, there may be
up to four XBS PCs on the same bus and one buswide XI581/2 that is in remote
access at the same time.
All XI581/2 are of equal priority, so that whichever device signs on first gains access
to a controller and no other device (local or remote) can sign on to the same con-
troller during this time.
Screen Displays
Initial screen displays depend on the status of the controller and its pending alarms.
Powered Controller
After you plug an XI582AH into a powered controller, the Main Menu appears in the
display window.
An XI581AH that is always attached to a controller typically displays the Main Menu
unless an operator has penetrated to some other menu.
Controller Power-on
The first display screen that appears after power-on is a message about the power
failure. Use the Cancel key (C) to acknowledge the message. The Main Menu is
displayed.
CPU Reset
If you press the controller's CPU reset switch, the controller restarts and the XI581/2
displays the 'title/copyright' screen.
Memory Cleared
If you push the reset switch, everything in the controller is deleted. Use the
reset switch only for servicing.
To reload the controller, follow the download procedure as explained in the Flash
EPROM and RAM Management procedures (in the "ALPHABETIC REFERENCE"
section). If the controller does not have Flash EPROM, use Excel CARE software to
download the controller.
Brightness Control
If desired, adjust the contrast of the screen display by turning the brightness control
knob on the bottom of the XI581/2:
Fig. 10. Brightness control on XI581/2.
Operation
The rest of this section describes the XI581/2 display area and its access levels. If
you are familiar with this information, continue with the sign-on procedure in the
"Local and Remote Sign-On and Sign-Off " section.