8
Light Curtain Multi-Function Control Module User Manual
Or
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nstruct
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detected and stop the Safety override function from becoming activated.
After one of the circuits is opened, the amount of time until the safety
function of a safety component is active again is maximum the response
time of the MSR42 module.
If an application does not require a safety override lamp (only allowed
after a safety evaluation corresponding to EN 12100), the monitoring of
the lamp can be deactivated in the configuration.
Note that the lamp still will indicate the override function, but is no
longer monitored. Instead of a safety prevention key switch, an enabling
switch or two independent, safety position sensors may be used,
depending on the application and the risk assessment.
Table 8
Table 9
OSSD connect
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ons
Overall response time of a system is the sum of the response time of the
OSSD outputs of the connected safety component (e.g. light curtains or
laser scanners) and the response time of the MSR42 and if used the
MSR45E modules (see Configuration Control Document).
Figure 10: Connection of up to two OSSD safety components (e.g. GuardShield Safe4 light
curtain systems)
Mut
i
ng
Muting is the temporary automatic suspension of a safety function. Using
the USB/optical interface and the “Configuration & Diagnostic
Software” different types of muting can be configured. There are several
muting option settings for light curtain systems. Details about different
types of muting and their characteristics can be found in the software
MSR42 Software “Configuration & Diagnostic Tool” and the
configured muting parameters are listed in the corresponding
configuration control document.
Blank
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ng
Blanking is typically used to allow a material to pass through the light
curtain during normal operation without causing a fault or stop
condition. This can include a sheet of metal passing through the light
curtain before an operation is performed to form the material. The Light
curtain will permit the material at a specific thickness but nothing more
without causing the safety outputs to turn off.
The MSR42 already supports teach-in fixed blanking via the basic
configuration.
There are two types of blanking available through the MSR42:
• Fixed blanking
• Floating blanking
When blanking is activated this has to be clearly indicated by a display or
a lamp. The MSR42 has only one monitored output available for muting
or blanking lamps. Therefore, muting and blanking cannot be configured
simultaneously.
On cascaded light curtains check especially for the beams in the area of
the end of the protective fields. In case of faulty settings the blanking
range may be unintentionally on the wrong stick.
Fixed blanking with monitoring requires the material to be present at all
times to prevent a fault condition. In many applications, the material may
shift slightly during normal operation. This can cause up to one more
beam to be blocked. Since this can occur during normal operation, the
MSR42 is configured to permit one additional beam to be blocked
without causing a fault (beam tolerance: -1 beam). As a result of adding
one more beam to the configured blanked area, it increases the resolution
of the light curtain. The table below shows the new resolution.
Table 10
Terminal
LED green
No LED flashing
GPIO3
Contact GPIO1/GPIO3 closed
Contact GPIO1/GPIO3 open
GPIO4
Contact GPIO2/GPIO4 closed
Contact GPIO2/GPIO4 open
Terminal
LED off
LED orange
Lamp
Safety override circuits opened
Safety override circuits closed
1. The use of the “Safety override”
function is only allowed in
applications, for which the risk
analysis (EN ISO 12100-1 and
EN14121) permits for the override of a
safety component. As a general rule,
emergency stop buttons may never
be overridden! The safety override key
for this switch has to be stored
securely, so that only authorized
personnel have access to this key.
2. The function “Safety override” can not
be understood as the function
“Muting” which is specified as the
temporary automatic suspension of a
safety function in the standard IEC
61496-1 A.7 or IEC 62046! Additional
requirements have to be fulfilled to
realize the “Muting” function which
are not described here.
SensaGuard safety switch OSSD outputs
cannot be connected to the GPIO1-
GPIO4.
After configuring one of the Blanking
functions, the light curtain resolution may
be changed. Therefore it is necessary to
attach an updated label to the Light
Curtain noting the changed resolution
has changed.
standard
Blanking area
Finger resolution
14mm
24mm
Hand resolution
30mm
55mm
Содержание MSR42
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