The various states of the LEDs on the TSX CCY 1128 and their meaning
(Original Document)
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Signaling operating mode
The table below gives the various states of the RUN lamp and their meanings
LED
Color
State
Meaning
RUN
Green
Lit
Module operating normally
Off
Module switched off or experiencing a fault
Signaling faults
The table below gives the various states of the ERR, I/O and CH0 LEDs and their meanings.
LED
Color
State
Meaning
ERR
Red
Lit
Internal module error:
  • module has broken down
Flashing
  • Error in communication with processor
  • Application missing, invalid or experiencing a fault during execution
Off
Operating normally, no faults
I/O
Red
Lit
External module fault:
  • Cabling fault
  • Encoder supply fault
  • Configuration/adjustment parameters declined
Flashing
Insignificant
Off
Operating normally, no faults
CH0
Green
Lit
Operating normally, channel is active
Flashing
The channel is not functioning correctly due to:
  • an external fault
  • a communication error
Off
Channel inoperative:
  • Channel not configured
  • Channel incorrectly configured