Rockwell Automation 1794-IJ2XT FLEX I/O Frequency Input Modules User Manual - Manual (Page 61)

35 Publication 1794-6.5.11 - September 2011
Chapter
5
Troubleshoot the Module
Overview This chapter provides a description of the different status indicators for the
frequency input module to help you troubleshoot.
Status Indicators The module has indicators for the following:
• Frequency and Gate Inputs
• Frequency and Gate Wire-Off Faults
• Alarm Outputs
When an input indicator (yellow) is lighted, it indicates that a valid signal
(active high or active low) is present at one of the input terminals.
When wire-off detection is enabled, and a wire-off fault is detected (24V DC
IEC 1+ input terminal only), a fault indicator (red) flashes at a rate of 1 Hz to
signal a fault condition. A wire-off fault signal is also sent to the backplane. A
flashing red fault indication means a valid wire-off condition for a 24V DC
IEC 1+ Input or a 24V DC contact switch input with a shunt resistor.
Topic Page
Status Indicators 35
Diagnostics 36
Diagnostic Bits in Word 5 of the BTR File 37
FREQ GATE
OK
0
FREQUENCY INPUT 2 CHANNEL
1
1794-IJ2
F 0 F
FREQ GATE
1 F 1 F
OUT
0
OUT
1
A = Input indicator
B = Insertable label for writing individual I/O assignments
C = Wire-off fault indicator
D = Output indicator
E = Power/status indicator – indicates power applied to module and status of module
A B C D E
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