Intelligent Technologies (
IT.
) D77A I/O Module Products
MN05002001E
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45
Troubleshooting and Maintenance
Status LED
The status LED is located on the upper left of the D77A I/O module as pictured in
Figure 1
,
Module Component Location. The LED’s status changes depending on the state of the I/O module.
Table 26: Status LED
Fault Codes
Table 27: Analog 10 Fault Codes
State
LED Behavior
No Power
OFF
Power-Up Routine
OFF – CRC corrupt
Off-Line, OK (mostly off)
On-Line (mostly on)
Faulted (50%)
Identify device (burst)
Undiscovered
0 x 41 (65)
Analog input over range.
0 x 42 (66)
Analog input under range.
0 x 44 (68)
Analog input open.
0 x 45 (69)
Analog input shorted.
Содержание D77A
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