Rockwell Automation 442L SafeZone Singlezone & Multizone Safety Laser Scanner - Manual (Page 18)

R
SafeZone™ Safety Laser Scanner User Manual
16 10000073050, July 2011
Original instructions
It is possible to switch between these monitoring cases during operation
using static control inputs.
Park mode
For mobile applications in which vehicles are parked for a time, the
SafeZone multizone safety laser scanner can be switched to park mode.
In the park mode the OSSDs are deactivated and the laser beam in the
safety laser scanner will shutdown. In this way the power consumption of
the device is reduced.
The park mode can be configured for a monitoring case. To switch to the
park mode, the input must be configured such that the related
monitoring case with the park mode is activated.
3.4.9 Static control inputs
The SafeZone multizone safety laser scanner has two two-channel static
control inputs through which the four possible monitoring cases can be
switched.
If you are using static sampling, decide between complementary or 1-of-n
sampling depending on the control features available.
Static complementary sampling
A control input comprises a pair of two connections. For correct
switching one connection must be inverted in relation to the other.
The following table shows the levels that must be present at the
connections for the control input to define the logical input state 1 and 0
at the related control input.
Table 6: Level at the connections for the control inputs for
complementary sampling
Using the control input pair on the SafeZone multizone safety laser
scanner; four monitoring cases can be switched.
Static 1-of-n sampling
With 1-of-n sampling you use each of the two control input connections.
All connections must be used, only one connection is ever allowed to be 1.
Table 7: Truth table for 1-of-n sampling
IMPORTANT Ensure that the safety distance to the
dangerous state is properly established
in any monitoring case to protect the
hazardous area.
See Section 4 “Installation and
mounting” on page 18.
Recommendation If you park vehicles beside each other,
switch them to the park mode. In this way
you prevent the SafeZone multizone safety
laser scanner on the vehicles from optically
interferring with each other and the
SafeZone multizone safety laser scanner
from possibly entering an error (lockout)
condition.
You can configure the monitoring cases in the SCD
software (device symbol SafeZone multizone safety
laser scanner system, context menu Configuration
draft, Edit...).
You can configure the control input in the SCD
software (device symbol SafeZone multizone safety
laser scanner system, context menu Configuration
draft, Edit..., file card Inputs).
IMPORTANT When switching the monitoring cases
using static control inputs, please note
the following points:
² Ensure that the control for the
monitoring case switching has a
sufficiently high level of safety.
² Ensure that the circuit for the control
inputs is suitable for the ambient
conditions to be expected so that
systematic effects and thus errors on
the switching of the monitoring
cases can be excluded.
² Ensure that the control—using static
control inputs—provides switching
between the monitoring cases in the
correct time frame. Note that at the time
of the switching there may be a person
in the protective safety field. Only by
means of switching in the correct time
frame (i.e. before the hazard occurs at
this point for the person) is protection
provided (see Section 4.5 “Timing for
monitoring case switching” on page 27).
Connection 1 Connection 2 Logical Input State
1 0 0
0 1 1
1 1 Error
0 0 Error
A1 A2 B1 B2
1 0 0 0
0 1 0 0
0 0 1 0
0 0 0 1