Frick QUANTUM Maintenance Manual page 5

•
Check the DC voltage at the LCD Test Points (TP).
These test points are located at the lower left cor-
ner of the Main Processor Board along the bottom
edge. TP1 should measure +5Vdc and TP2 should
measure +5Vdc. Measure these voltages after
booting. If the voltages are correct and there is no
garbled display, then a new display assembly will
have to be ordered.
WHAT IF THE "OPERATING STATUS" DISPLAY IS
SHOWN GARBLED
If the "Operating Status" display is up and running but the
display is garbled (shifted off center or "looks" wrong):
•
Check all the items listed above for checking the dis-
play. If they check out OK but the display is garbled,
then the problem is probably with the main processor
board and it will need to be replaced. A new display
may still be required, but a new main processor board
usually corrects the problem.
WHAT IF DISPLAY TEXT IS SHOWN INCORRECTLY
If the "Operating Status" display is shown but data and text
are appearing incorrectly on some displays:
•
Clear the memory as described in the S90-010 FSI
publication. Note: It may take up to three repetitions
of the above procedure before all memory locations
are erased and booting is successful. All setpoints
and calibration data must be reentered.
TROUBLESHOOTING ANALOG AND DIGITAL
PROBLEMS
This information can help locate problems that can occur
with analog and digital input and output circuit boards.
Troubleshooting The Analog And Digital Boards
The "About" display shows the analog and digital boards
have been detected. If a board has lost communications a
shutdown will be issued. All outputs are turned off on a
digital board that 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.
After replacing or installing an analog or digital board and
applying power on the control panel, select [Detect I/O
Boards] from the "Change Communications" display in
Panel Setup. This selection provides a method to detect all
connected Analog and Digital boards. The "About" display
will show what was detected.
The analog and digital boards have built-in features that
help to troubleshoot faulty boards. Following is a descrip-
tion 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.
FRICK QUANTUM CONTROL PANEL
MAINTENANCE
3.
Troubleshooting Digital and Analog Inputs and Outputs
The "Service Screen" display has been provided to view
the raw data from an analog or a digital board. There is a
separate display for each of the analog and digital boards
that are present. Digital values are shown as ON or OFF.
Analog values are converted from binary to show volts. The
error factor is ± .05 volts.
Checking the Digital Inputs and Outputs
Some problems that are encountered involve troubleshoot-
ing the digital inputs and outputs. The Digital I/O (Input /
Output) boards have six Digital I/O (DIO) board connectors
labeled P1 through P6. The input and output modules are
wired to a DIO connector plug. Position 3 provides power
and position 4 is a neutral on the DIO connectors. Position
1, 2, 5, and 6 are signal connections.
The Digital I/O board's I/O modules are configured by proper
module selection, AC or DC, operating voltage, input or
output, and moving the fuse to the "in" or "out" position. An
LED is associated with each module and displays the state
of each module. A lighted LED represents an Input that is
"High" or an Output that is "On". Each of the sixteen mod-
ules has a corresponding software configuration screen.
If a properly configured Digital I/O is not responding correctly,
first look at the digital board on the "Service Screen" display
and check if the module is on. If it is not on, check if the LED
on the digital board is also not lit. If the LED is not lit, then
check the fuse. If the fuse is OK, then check the module.
FUSE TESTING AND REPLACEMENT
1.
2.
3.
4.
5.
6.
7.
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If the power LED is not lighted, check the cable for
proper connectivity. Note: Each board provides
the necessary 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.
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" display, or
an I/O Comm failure occurs, check the address of
the board. Reference the Frick publication E90-
010 SPC. This publication contains the dipswitch
settings for addressing the analog and digital I/O
boards numbers (1) through (6). When these
switches are properly set, the main processor board
is able to serially communicate with each board
and provide control signals and data exchange.
Power off the panel.
Open the panel door.
Remove the questionable fuse.
Place the questionable fuse into the fuse tester at the
bottom of each digital I/O board.
Power on the panel.
Check the LED on the tester. If the LED is lit, the fuse is OK
Power off the panel.
S90-010 M
Page 5