Display
(Original Document)
About us
At a Glance
Five LEDs on the front panel of the processor enable fast diagnostics of the status of the PLC.
Description
The following table describes the role of each LED.
LEDs
On
Flashing
Off
RUN
(green)
PLC running normally, program executing.
PLC in STOP mode or blocked by software error.
PLC not configured: application missing, invalid or incompatible.
RUN (TSX H57)
(green)
PLC running in Primary mode, full program execution
  • 2.5s ON, 500ms OFF: PLC running in Standby mode, only first section execution
  • 500ms ON, 2.5s OFF: PLC running in Offline mode, no program execution
  • 500ms ON, 500ms OFF: PLC in STOP mode or blocked by a software error
PLC not configured: application missing, invalid or incompatible
ERR
(red)
Processor or system error.
  • PLC not configured (application missing, invalid or incompatible),
  • PLC blocked by a software error,
  • memory card battery error,
  • X-Bus error.
Normal state, no internal error.
I/O
(red)
Input/Output errors coming from a module, a channel or a configuration error.
X-Bus error.
Normal state, no internal error.
TER
(yellow)
-
Terminal port link active. The rate of flashing is relative to the amount of traffic.
Link not active.
FIP
(yellow)
-
Fipio bus link active. The rate of flashing is relative to the amount of traffic.
Link not active.
NOTE:
  • an X-Bus error is signaled by simultaneous flashing of the ERR and I/O LEDs,
  • The FIP LED is only present on TSX P57 x54 and TSX P57 x84 processors.