Functional Safety KFD2-RSH-1.2E.L*(-Y1)
Operation
2
01
9-
12
17
5.1
Internal Diagnosis
With enabled internal fault detection a diagnostic coverage of 81.2 % is achieved.
Monitor one of the 4 possible ways of fault detection:
•
Input impedance change
1
•
Fault indication output
•
Collective error message output
•
LED indication
The device has three output relays. To ensure a complete diagnosis, three switching
operations are necessary. You have 2 options to achieve the diagnostic coverage, see step 2
of the following section.
Internal Diagnosis Procedure
1.
Enable the internal fault detection. See chapter 4.2.1.
2.
You have 2 options to achieve the diagnostic coverage:
•
Switch on the output manually three times.
or
Observe whether the output switches on three times during the normal operation.
or
•
Check the output function at periodic intervals. Switch on the output at least three times a
year as described in the steps 1 and 2.
1
In this case only use a safety PLC with digital output and line fault detection.
Note
Maintain a distance of at least 2 s between the switching processes.
