Diagnostic Mode
5-7
Format of LCD Display
The multi-functional alphanumeric LCD display shows car status and can also be used for diag-
nostic purposes to display the contents of computer memory. The figure shows the various parts
of the LCD in Diagnostic mode.
Normal Display For simplex controllers, the
letter D in the drawing will not appear on the LCD and
instead that part of the display will always be blank.
For a duplex controller, this part of the display pro-
vides information about the communication between
the controllers and about the dispatching. One of the
following codes should appear:
S Indicates that this computer is acting as the
slave to the dispatching computer. Hall call assign-
ments are received from the dispatching computer
through the communication cable.
D Indicates that this computer is acting as the dispatcher. It is responsible for assigning
hall calls to itself and to the other controller.
Blank If this part of the display is blank, it denotes that communication has not been
established between the two cars (see Section 6 for information on identifying and solving com-
munication problems).
Status / Error Message The top line of the LCD dis-
play shows the prevailing status of the elevator. The message is
scrolled if it is larger than the space available. There is a status
message for each special operation (e.g., Fire Service). There are also messages for most error
conditions (e.g., open safety string). For a list of these status and error messages including a
description and troubleshooting suggestions see “Status and Error Messages” on page 6-4.
Elevator Position The underlined section in this display
shows current elevator position relative to the bottom floor. The
number 1 denotes the lowest landing in the elevator system.
Computer Internal Memory The underlined section
in this display shows the computer internal memory address (2
digits) and the data (8 digits) at that address. The colon charac-
ter (:) separates the address from the data. The address is changed by first pressing the N push
button, then the + and - pushbuttons.
Each of the 8 data digits (flags) corresponds to a particular elevator signal or condition. There
are 8 pieces of information about the elevator at each memory address. Each data digit is either
one or zero. One indicates the signal or condition is ON and zero indicates it is OFF.
D NORMAL OPERATI
PI 8 2O:1O11OO11
Duplex Configuration:
D = Dispatcher
S = Slave
Blank = Simplex Operation
Car Status
Elevator
location
Address location and
8 flags at that address
CAR IN TEST MODE
PI 8 2O:1O11OO11
D NORMAL OPERATI
PI 8
2O:1O11OO11
D NORMAL OPERATI
PI 8 2O:1O11OO11
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