Festo CMMT-ST-C8-1C Series Manual page 39

Malfunctions
LED Meaning
Illumi- The safety sub-function has been requested and is active.
nated
yellow
Illumi- Ready, no safety sub-function has been requested.
nated
green
Tab. 43: Safety LED
Application status
LED Meaning
Flashe Identification sequence active (for optical identification of the device in a network),
s which can be activated via the parameterisation software
alter-
nately
betwe
en
red,
yellow
and
green
Flashe Reserved for future extensions
s
yellow
Lights
up
yellow
Flashe
s
green
Lights
up
green
Tab. 44: Application status LED
Special function of the start program (bootloader) during firmware updates
When the bootloader starts the update procedure, the status LED flashes yellow at half-second
intervals. The power LED, safety LED and application status LED remain dark.
If an error occurs during a firmware update, the status LED flashes red at one-second intervals. The
frequency of flashing corresponds to the error number specified in the following table. After flashing,
there is a pause of 3 s. Then the procedure repeats.
Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b 39