Publication 1794-6.5.11 - November 1997
Troubleshoot the Frequency Input Module
6
-3
Diagnostics
The frequency input module returns diagnostics to the PLC processor in
word 5 of the BTR file. These diagnostics give you information on the
status or condition of the module.
Diagnostic Bits in Word 5 of the BTR File
What’s Next
To find out more about the IJ2 module:
Word 5
Bits 00-03
Diagnostic Status – indicates the response from the module; a normal or non-normal operating
condition.
Bit
03
02
01
00
Decimal equivalent and condition
0
0
0
0
0 = Normal Operation (No Failure)
0
0
0
1
1 = Calibration Failure
0
0
1
0
2 = Configuration Failure – A Minimum Frequency Sample
Time value other than 0-9 was selected.
0
0
1
1
3 = Message Failure
0
1
0
0
4 = Lead Break Detection Hardware Failure
0
1
0
1
5 = Major Hardware Failure
0
1
1
0
6 = EEPROM Failure
0
1
1
1
7 = RAM Failure
1
0
0
0
8 = ROM Failure
1
0
0
1
9 = Calculation Failure
The actual Frequency is greater than 32,767 Hz. or 3,276.7
Hz. (overange).
The scaled Frequency is greater than 32,767 Hz. or 3,276.7
Hz. (overange).
The % Full Scale calculation (based on Maximum
Frequency) is
>
3,276.7%.
1010-1111
10 – 15 = Not Used
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
word 5
See Table for diagnostics
Specifications
A
See appendix A
or
appendix B
For
specifications on the IJ2 module
simplified schematics