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Expanding an ea
s
ySafety
device
629
02/16 MN05013001Z EN
Monitoring the functionality of the expansion device
If the power supply of the expansion unit is not present, no
connection can be established between it and basic unit. The
expansion inputs R1 to R12, R15, R16 are incorrectly
processed in the basic unit and show status 0. The outputs
S1 to S8 in the expansion device cannot be set.
The status of the diagnostics contact ID14 of the basic unit
indicates the status of the expansion unit:
• ID14 = 0: expansion unit is functional.
• ID14 = 1: expansion unit is not functional.
Example
The expansion unit may be powered up later than the basic
unit. This means that the basic unit is switched to RUN when
an expansion unit is missing. The following easySafety circuit
diagram detects if the expansion unit is functional or not
functional.
Figure 297:
Standard circuit diagram for expansion testing
As long as ID14 is 1, the remaining standard circuit diagram
is skipped. If ID14 is 0, the standard circuit diagram is
processed. If the expansion unit drops out for any reason,
the standard circuit diagram is skipped again. M01 detects
whether the standard circuit diagram was processed for at
j
Danger!
Ensure the continuous monitoring of easySafety expansion
devices in order to prevent switching faults in machines or
systems.
ID14----
M
01-------------------
Ä
: 08
-------------------------------S M 01
ID14---------------------------
Ä
: 08
IS01--
u
-IS02-------------------
Ä
QS01
QS01--
k
...
: 08
Содержание easySafety
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