Diagnostic Messages; Table 9-8 Diagnostic Error Messages - Honeywell VPR100 User Manual

9.6 Diagnostic Messages

The instrument executes diagnostic routines during instrument start-up and during maintenance procedures
such as calibration. It also monitors online operation for both process faults and instrument errors.
Error messages
Table 9-8 shows messages that may appear on the instrument displays if a diagnostic condition is detected,
along with the action you should take.
Message
INPUT FAIL
FLOAT PT ERROR
CHECKSUM ERROR
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Table 9-8 Diagnostic Error Messages

Description
The analog input is either open/shorted
The analog input has been exposed to
electromagnetic noise.
The analog input is out of range
A floating point calculation error has
occurred. (divide by zero, underflow,
overflow).
An error was detected in the database
of one or more function blocks. The
affected function blocks are reset to
their defaults.
VPR & VRX – User Manual
On-Site Adjustments
User action
Check input devices for open or short.
See Section 2 for proper wiring
techniques.
Each AI type uses one of four gain
settings. The maximum voltage normally
supplied by the AI source determines
which gain setting is used, and therefore
its measurable range.
Gain Low signal High signal
25mV -30mV 30mV
75mV -90mV 90mV
1V -200mV 1200mV
5V -300mV 5200mV
Example: AI1 is 1 to 5V range, therefore
gain is 5V, therefore input failure if
-300mV > signal > 5200mV.
Check Free Form Math and Math CV
inputs for division by 0. Also check for
input values producing a underflow or
overflow error (that is, calculation is not
-38 38
between -1x10 and -3x10
-38 38
between 1x10 and 3x10 ).
Inspect entire instrument configuration
and reconfigure as needed.
or is not
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