Safety Relay User Manual Owner's manual

Rockwell Automation Publication 440C-UM001C-EN-P - November 2014 127
Specifications Appendix A
Table 24 - For SMF2 - Safety Mat
A demand of the Safety Mat will force a safe state after 100 ms.
Monitoring Time - Occurrence of Recoverable Faults and Failures
Recoverable faults as defined earlier (Chapter 15 - Troubleshooting) are faults
and failures within the connected periphery of the CR30. The ability to detect
faults depends on the wiring, the type of sensor, and the signal evaluation
function that is applied to the circuit. The monitoring time is the amount of time
to evaluate the fault or failure after detection and to initiate appropriate system
response. Recoverable faults can be recovered by removing the fault and cycling
the appropriate input circuit.
The detection of a recoverable fault does not lead to the loss of the safety
function. When the safety function is demanded during the monitoring time,
after the occurrence of a recoverable fault, the system will respond within the
safety response time according to the response time considerations of this safety
function (See System Response Time Calculation
on page 124).
Note: Monitoring measures that are provided by CR30 to the periphery
define the diagnostic coverage of the application and thus the safety rating.
Internal monitoring measures related to a fail-safe design of CR30 are only
related to the safety integrity of the CR30 itself, see “nonrecoverable”
faults.
Examples of recoverable faults include:
• Cross loop and shorts to 24V and COM faults
• Input discrepancy
• Muting: Synchronization times exceed
• Muting time exceeded
• Muting sequence fault
• Two-hand discrepancy fault
• Reset/Restart timing fault
Comment Value
Safety Sensors Safety response time of sensor device
- considered as 0 ms since
mechanical device only
0 ms
SMF Safety mat processing time 25 ms
Input Filter Advanced Settings: Input Filter: 0ms 0 ms
Logic Internal execution time to process
input signal, routing, and output
processing
45 ms
SOF Configured Off-Delay time -
immediate OFF
0 ms
Actuator Same contactor is controlled by the
safety mat SMF as by the E-stop
30 ms
Total 100 ms