Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b
Technical data
25
With suspended axes, additional measures must be put in place to protect against falling loads. The
device does not feature a safety sub-function SBC (Safe brake control).
Measures must be put in place to protect against loads that are coasting down.
We recommend decelerating the drive to a standstill before applying a brake. See information on
implementing the safety function SS1-t.
8
Malfunctions
8.1
Diagnostics via LEDs
Safety LED, functional status of the safety engineering
Malfunctions of the safety sub-function are detected and displayed in the functional device. The
following are detected:
–
Safety sub-function STO requested via 1 channel (discrepancy monitoring)
–
Plausibility check of STO channel switch-off
Malfunctions are externally reported by the functional part, including via the additional communica-
tion interfaces (bus, commissioning software).
LED
Meaning
Flashe
s red
Error in the safety part, or a safety condition has been violated.
Illumi-
nated
yellow
The safety sub-function has been requested and is active.
Illumi-
nated
green
Ready, no safety sub-function has been requested.
Tab. 9: Safety LED
8.2
Repair
Repair or maintenance of the product is not permissible. If necessary, replace the complete product.
1. If there is a defect: always replace the product.
2. Send the defective product unchanged, together with a description of the fault and application,
back to Festo.
3. Check with your regional Festo contact person to clarify the conditions for the return shipment.
4. Validate the safety function after any modification to the installation. Validation check lists
9
Technical data
9.1
Technical data, safety engineering
Safety specifications
Type test
The functional safety engineering of the product has been certi-
fied by an independent testing body, see EC-type examination
certificate
