Festo CMTT-AS S1 Series, Description, Page: 31 / 46

– SBC: Cyclical test required at least once every 24 h and SBA evaluation recommended whenever
the SBC sub-function is requested to ensure maximum diagnostic coverage and the highest
safety-related classification.
8 Malfunctions
8.1 Diagnostics via LED
Safety LED, status of the safety equipment
Malfunctions of the safety sub-functions are detected and displayed in the functional device. The fol-
lowing are detected:
–
Safety sub-functions requested via 1 channel (discrepancy monitoring)
– Internal device errors that lead to pulse monitoring not being switched off or only switched off on
one channel
– Errors in the brake outputs or the external wiring that result in voltage being present on the brake
output even though the safety sub-function SBC has been requested
Malfunctions are externally reported by the functional part, including via the additional communica-
tion interfaces (bus, commissioning software).
LED Meaning
Flash-
es red Error in the safety part, or a safety condition has been violated.
Flash-
es yel-
low The safety sub-function has been requested but is not yet active.
Lights
up
yellow The safety sub-function has been requested and is active.
Flash-
es
green Output stage, brake outputs and safety diagnostic outputs are blocked (safety
parameterisation is running).
Lights
up
green Ready, no safety sub-function has been requested.
Tab. 13 Safety LED
8.2 Repair
Repair or maintenance of the product is not permissible. If necessary, replace the complete product.
1. If there is an internal defect: Always replace the product.
2. Send the defective product unchanged, together with a description of the error and application,
back to Festo.
3. Check with your regional Festo contact person to clarify the conditions for the return shipment.
Malfunctions
31 Festo — CMMT-AS-...-S1 — 2018-10a