Festo control block CPX-CEC
LED
Sequence
Meaning
Error handling
PL (power
load)
Lights up
green
No error. Load
voltage present
–
Flashes
green
Load voltage at
the system
supply or
additional supply
outside the
tolerance range
•
Eliminate undervoltage
SF (system
failure)
Flashes
red
Minor error
(class
1)/information
•
Description of the error
numbers in the CPX system
manual
Error (class 2)
Serious error
(class 3)
No error
–
M (Modify:
Modify/force
active)
Flashes
yellow
Forcing is active
The Force
function is
enabled (see
CPX system
manual, system
parameter Force
mode; function
no. 4402).
–
Does not
light up
Forcing is not
active
–
Table: Status LED states
59
