820i Programmable HMI Indicator/Controller
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10.0 Appendix
10.1 Troubleshooting
Table 10-1 lists general troubleshooting tips for various hardware and software error conditions. See the following pages for
additional information about specific diagnostic tools.
Always save copies of the indicator configuration, calibration, Revolution® and iRite-IDE files on a local PC so that
these are available when a software reload or upgrade is required.
Symptom
Cause/Remedy
Indicator does not power up
Possible blown fuse or bad power supply.
Check all voltages on CPU board. Power supply should output both +6V and –6V levels to the CPU
). If power supply appears bad, check the small glass fuse (2.5A,
5x20mm) on the power supply board.
Front panel power indicator blinking ( )
Power supply overloaded. Check for shorts in A/D card regulators or in the DC-to-DC converter of
any installed analog output or pulse input cards.
"Blue screen"
Press front panel
Display
key, press
down
key, enter
100
using the numeric keypad, then press
Enter
. Possible corrupt core software; reset or reload software.
Hangs in "888" display
Corrupt core software. Reset or reload software.
Tare and truck data pointers are cor
-
rupt
,
Tare storage is corrupt
error mes
-
sages at startup
Possible dead battery. Perform configuration reset then check for low battery warning on display. If
battery is low, replace battery, perform another configuration reset, then reload files.
Divide by zero
error message at startup
ERROR
message in weight display
Excitation voltage too low or off.
Dashes in weight display
Overrange or underrange scale condition. Check scale. For out-of -range conditions in total scale
display, check all scale inputs for positive weight values.
Display reads
0.000000
Scale not updating. Check for bad option card hanging the bus.
Cannot enter setup mode
Possible bad switch. Test switch; replace interface board if necessary.
Serial port not responding
Possible configuration error. For command input, ensure port INPUT parameter is set to CMD.
A/D scale out of range
Check source scale for proper mechanical operation. Check load cell and cable connection. Possi
-
ble bad load cell: check indicator operation with load cell simulator.
Locked — Scale in use
Scale is assigned as an input to a total scale or is the source for a serial scale, analog output, or
setpoint. If not correct, deconfigure this scale assignment and reconfigure as required.
Serial scale out of range
Check source scale for proper mechanical operation. Check cable connection.
Possible format mismatch between serial scale and
820i
: Check SFMT specification under SERIAL
menu.
Option
x
Error
Field bus card (Profibus, DeviceNet, or Remote I/O) in slot
x
failed to initialize.
Option card failure
Possible defective card or slot.
Option card hardware diagnostic error
Required option card not found. See
Table 10-1. Basic Troubleshooting
Note
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