Interrupts/diagnostic messages/diagnostics
6.4 Diagnostics by LED display
Digital I/O module F-DI 4+F-DQ 2x24VDC/2A, 4xM12 (6ES7146-5FF00-0BA0)
Equipment Manual, V1.0, 05/2021, A5E51082342-AA
69
DIAGInput LEDs
Meaning
On red
Channel fault or module fault affecting the channel
Alternately Flashes
red/green
Fault resolved, awaiting reintegration
Channel LEDs for 1oo2 input channels
Table 6- 5
Meaning of the channel LEDs for 1oo2 input channels
Primary input LED
Secondary input LED Meaning
Off
Off
Process signal = 0 (equivalent)
On green
On green
Process signal = 1 (equivalent)
Off
On green
Process signal = 0 (nonequivalent)
On green
Off
Process signal = 1 (nonequivalent)
On red
On red
Channel fault or module fault affecting the channel
Alternately Flashes
red/green
Alternately Flashes
red/green
Fault resolved, awaiting reintegration
Channel LED for output channels
Table 6- 6
Meaning of the channel LED for output channels
Output LED
Meaning
Off
Process signal = 0 or channel deactivated
On green
Process signal = 1
On red
Channel fault or module fault affecting the channel
Alternately Flashes
red/green
Fault resolved, awaiting reintegration
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