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7-1
Chapter 7. Problem Determination
and Maintenance
Diagnostic Testing Function
The 1483 Display Station can perform two types of diagnostic tests: offline tests that
check the operation of the display station independent of its attached control unit, and
online tests that check the 1483 as it interacts with the attached control unit. For purposes
of customer problem determination, some offline tests are presented in this section.
For information about online tests, refer to your controller’s user’s guide.
Offline Tests
The display station temporarily enters Offline Test mode each time it is powered on. The
display station’s own series of Basic Assurance Tests (BATs) are run each time the display
station is powered on. If an error is detected, the alarm sounds and an error condition
may be displayed in row 1, column 1.
K
is displayed for a keyboard error and
L
is
displayed for a logic error.
Hold down a key while simultaneously turning on the Power-On/Off switch to enter
Offline Test mode. From Offline Test mode, you can enter Setup mode to set or change
special controls, such as the Numeric Lock and the Serial Number. Offline Test mode is
also used to determine hardware malfunctions by running tests from the System Manager
menu. Special controls that can be set from the System Manager menu are also presented
here.
