Rockwell Automation 442L SafeShield Safety Light Curtain Hardware - Manual (Page 20)

SafeShield Safety Light Curtain Hardware User Manual
20
With the aid of the SCD diagnostics function, you can
check whether defined areas have been changed using
teach-in. Menu Project, Connect. Then device symbol
for the related system, context menu Diagnostics, Show.
Reduced Resolution
Under reduced resolution, the light curtain ignores the interruption
of 1, 2 or 3 adjacent beams. Objects which are not larger than
specified in Table 12 may be moved through the light curtain
without the light curtain changing to red (Figure 17,
➊ and ➋).
Figure 17: Schematic layout of the operation with reduced resolution
(example: reduction by one beam)
Table 12: Effective resolution and maximum size of moving objects under
reduced resolution
Notes
• The reduced resolution function can only be used with
the SafeShield safety light curtain with a physical
resolution of 14mm.
• The first beam of the light curtain (close to the 7-
segment display) must not be interrupted. Otherwise,
the safety light curtain will change to red.
Physical
resolution Reduction
Effective
resolution
Maximum size
of movable
objects
14mm
1 beam 22mm 10mm
2 beams 30mm 18mm
3 beams 37mm 25mm
ATTENTION: Test the protective
device after teach-in!
➢ Test the entire protective device for
effectiveness (see “Test Notes” on page
31).
➢ Check whether the safety light curtain
behaves as expected when you introduce
the object into the protective field,
remove it again, or operate the system
without the object.
➢ If required, recalculate the safety distance
and readjust it on the machine.
!
• The system response time does not change under
reduced resolution.
• You cannot combine the function Reduced resolution with
the function Floating blanking with partial object monitoring
(see page 17).
• With reduced resolution, the 7-segment display
indicates as soon as sender and receiver are aligned.
Figure 18: Marking the effective resolution on the device label
Device symbol SafeShield safety light curtain Host
(receiver), context menu Configuration draft, Edit, file
card Host or Guest for the related system, option
Reduced resolution. Here you can adjust the effective resolution
in millimetres directly.
Sender Test
The SafeShield safety light curtain sender has a test input on pin 3
for checking the sender and the related receiver. During the test,
the sender no longer emits light beams. Thus, it simulates — for
the receiver — an interruption of the protective field.
Resolution modified
to: (please mark) Physical resolution
14mm 30mm
Reduction Effective Resolution/min. object size
1 beam 22mm
√
50mm
2 beams 30mm 70mm
3 beams 37mm 90mm
n beams mm mm
ATTENTION: Check the safety
distance!
The safety distance required under reduced
resolution depends on the effective
resolution.
➢ If required, recalculate the safety distance
and readjust it on the machine.
Example: – physical resolution 14mm
– resolution reduced by 1 beam
– effective resolution 22mm
Calculate the safety distance
with a resolution of 22mm (see
page 21).
➢ Mark the effective resolution on the
information label “Operation with
reduced resolution or blanking ... on the
related sender and receiver.
ATTENTION: During operation with
“Reduced resolution” or “Blanking” the
safety distance that corresponds to the
modified resolution is to be observed.
!