Baumuller b maXX BMC-M-SAF-02, Руководство по эксплуатации

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Commissioning
Operation Manual b maXX safe PLC BMC-M-SAF-02
Document no.: 5.07020.04
61
of 118
11
may be potentially reached after the download or certain slaves may not be reached any
longer (display in diagnostic markers).
11.1.2 Combined operation of the safety PLC
In this operation mode, the standard PLC and the safety PLC run on a processor in the
safety control in very short time alternation (time slicing).
The functionalities of the standard PLC and safety PLC can be operated practically in par-
allel. The processing power is distributed between 10% and 90% by means of the safe
parameters (
Z
Determination of the device parameters
–
on page 43).
This operation mode is set by transferring an IEC project to the standard PLC and acti-
vating it.
Combined operation results in the following system behavior:
The RUN/STOP switch affects the standard PLC and the safety PLC.
If both PLCs are to start up after being switched on, then a project must be present on
each PLC and the RUN/STOP switch must be in the "RUN" position.
Other actions (other than the RUN/STOP switch) will only take effect on the respective
piece being addressed (standard PLC or safety PLC). However, every action will stop,
since the standard PLC also stops the safe communication. (The reason for this is that
the communication is coupled to the status of the standard PLC and the safe communi-
cation cannot run if the standard communication is not running.)
NOTICE!
If a bus configuration on the standard PLC is present and a safety project including
configuration files is present on the safety PLC, the safe communication will run in
RUN status as well as the STOP status of the safety PLC. All original data is set on
0 (failsafe value) in STOP status. Safe communication will no longer run if the safety
PLC goes into error status. The connected safety devices then recognize the break-
down in safe communication and go into safe status independently.
CAUTION!
Danger due to non-safe status!
Do not attempt to bring about the safe status of the system by using the stop position
of the run/stop switch. This status is not safe, since the run/stop switch only serves
functional purposes.
Therefore:
m
In order to establish safe status, a correspondingly configured and suitable emer-
gency stop device should be actuated or the power to the safe system should be
shut off.