Rockwell Automation 442L SafeShield Safety Light Curtain Hardware - Manual (Page 13)

SafeShield Safety Light Curtain Hardware User Manual
13
The connection can signal one of the following states:
Table 5: Possible configuration for the signal output
Device symbol SafeShield safety light curtain Host
(receiver), context menu Configuration draft, Edit,
file card General, option Assignment of the signal
output.
The electrical connection of a PLC/controller to the signal output is
described in “Signal Output (ADO)” on page 12.
Beam Coding
If several SafeShield safety light curtains operate in close proximity
to each other, the sender beams of one system may interfere with
the receiver of another system. With code 1 or 2 activated, the
receiver can distinguish the beams designated for it from other
beams. The following settings are available: noncoded, code 1 and
code 2.
Assignment Possible uses
Contamination Eases diagnostics in case of dirty front screen
OSSD status with
delay of [s] Signals the status of the switching outputs. If the safety
light curtain switches to red, then it signals the status
immediately. If it switches to green, then it signals the
status only after an adjustable delay in the range from
0.1 to 3.0 seconds.
Status of the
emergency stop Signal is present if the button connected to the
emergency stop input on the SafeShield safety light
curtain has been pressed.
ATTENTION: You must not use the
signal output for safety-relevant
functions!
You are only allowed to use the signal output
for signalling. You must never use the signal
output for controlling the application or with
safety-relevant functions.
!
ATTENTION: Use different beam
codings if the systems are mounted in
close proximity!
Systems mounted in close proximity to each
other must be operated with different beam
codings (code 1 or code 2). If this precaution
is neglected, the system may be impaired in
its protective function by the beams from
the neighboring system and so change to the
unsafe state. This would mean that the
operator is at risk.
Figure 8: Schematic layout of the beam coding
Notes Beam coding increases the availability of the protected
machine. Beam coding also enhances the resistance to
optical interference.
In a cascaded system the host and guest always have the
same beam coding. There is no mutual interference.
Beam coding will increase the response time of the
system. This will also change the required safety distance.
Instructions can be found in the “Determining the Safety
Distance” section on page 21.
After activating the system, sender and receiver will briefly
display the coding.
Beam coding is only possible on systems with a maximum
total of 405 beams.
Device symbol SafeShield safety light curtain Host
(receiver) or SafeShield safety light curtain Host
(sender), context menu Configuration draft, Edit, file
card General, option Beam coding.
Scanning Range
The available settings depend on the physical resolution of the
system:
Table 6: Physical resolution and scanning range
Device symbol SafeShield safety light curtain Host
(receiver), context menu Configuration draft, Edit,
file card Host or Guest, option Scanning range [m].
Physical
Resolution
Selectable
Scanning
Ranges
Scanning Range
with 1 Weld
Shield
Scanning Range
with 2 Weld
Shields
14mm 0-2.5m
2-6m
0-2.3m
1.8-5.5m
0-2.1m
1.7-5
30mm 0-6m
5-19m
0-5.5m
4.6-17.4m
0-5m
4.2-16m
!
ATTENTION: Match the scanning range
with the protective field width!
The scanning range of the system (host,
guest 1 and guest 2) must be adapted to the
width of the protective field.
• If the scanning range is set too low, the
light curtain may not switch to green.
• If the scanning range is too great, the light
curtain may malfunction. This would mean
that the operator is at risk.
!