Festo — CMMT-AS-...-S1 — 2021-04d
Malfunctions
31
7
Operation
Check the safety functions at adequate intervals for proper functioning. It is the responsibility of the
operator to choose the type and frequency of the checks within the specified time period. The manner
in which the test is conducted must make it possible to verify that the safety device is functioning
perfectly in interaction with all components. Time period for cyclical test
engineering.
The CMMT-AS is maintenance-free during its period of use and specified service life. The test interval
varies from one safety sub-function to another:
–
STO: no test has to be carried out during the period of use, but we recommend evaluating STA
whenever the sub-function is requested to ensure maximum diagnostic coverage and the highest
safety-related classification.
–
SBC: cyclical test required at least once every 24 h and SBA evaluation recommended whenever
the sub-function SBC is requested to ensure maximum diagnostic coverage and the highest safety-
related classification.
8
Malfunctions
8.1
Diagnostics via LEDs
Safety LED, status of the safety equipment
Malfunctions of the safety sub-functions are detected and displayed in the functional device. The
following 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
Flashe
s red
Error in the safety part or a safety condition has been violated.
Flashe
s
yellow
The safety sub-function has been requested but is not yet active.
Illumi-
nated
yellow
The safety sub-function has been requested and is active.
