Troubleshooting Analog And Digital Problems; About" Screen; Diagnosing An Analog Or Digital Board Problem - Frick QUANTUM Maintenance Manual

TROUBLESHOOTING ANALOG AND DIGITAL PROBLEMS

The information that follows in this section can help locate
problems that can occur with Analog and Digital input and
output circuit boards.
The "About" screen shows the Analog and Digital boards
that have been detected.
communications, a shutdown will be issued. All outputs
are turned off on a Digital Board that has lost
communications. All outputs will get set to their minimum
value range on an Analog Board that has lost
communications. A loss of communications to an analog
board will probably result in sensor fault shutdown
messages that are associated with the sensors on that
board.

Diagnosing an Analog or Digital Board Problem

The Analog and Digital Boards have built-in features that
help to troubleshoot faulty boards. Following is a
description of the built-in features:
1. The Analog and Digital Boards have an "Active "
LED indicator on the board that blinks when the
board's software is running.
·
If the "Active" LED is not blinking, check to
ensure that the EPROM is installed properly.
2. There is also a "Power" LED that lights when DC
power is applied to the board.
·
If the power LED is not lighted, check the
cable for proper connectivity. Note: Each
FRICK QUANTUM COMPRESSOR CONTROL PANEL
MAINTENANCE

"About" Screen

If a board has lost
board provides
connections to feed all signals to the
following connectors. If the auxiliary
Analog or Digital Board is not present
then a jumper plug (Part # 640B0039H01)
must be installed to daisy chain the
signals.
3. The main indication of communications is the
RX/TX LED's on the I/O board. These LED's
should blink in response to the blinking of the
main processor board's I/O communication
activity RX/TX LED's. If the RX LED on the I/O
board is blinking but the board was not detected
on the "About" screen, or an I/O Comm failure
occurs, check the address of the board.
· Reference the "JUMPER AND DIPSWITCH
SETTINGS" section later in this manual. This
section contains the dipswitch settings for
addressing the Analog and Digital I/O
Boards numbers (1) through (6). When these
switches are
processor board
communicate with each board and provide
control signals and data exchange.
S90-010 M
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the necessary
properly set, the main
is able to serially