Original instructions, 5 indicators and outputs – Rockwell Automation 442L SafeZone Singlezone & Multizone Safety Laser Scanner User Manual
Page 19
R
SafeZone™ Safety Laser Scanner User Manual
10000073050, July 2011 17
Original instructions
Input delay
If the control device which is used to switch the static control inputs cannot
switch within 10 ms (for 60 ms basic response time) or 20 ms (for 120 ms
basic response time) to the related input condition (e.g. due to switch
bounce times), you must choose an input delay. For the input delay choose
the time in which your defined control device can switch to a
corresponding input condition.
Independent of the basic response time chosen for the SafeZone
multizone safety laser scanner, you can increase the input delay in 30-ms
steps (for 60 ms basic response time) or 60-ms steps (for 120 ms basic
response time).
The following figures, derived from experience, are a guide for the
various switching methods given.
Table 8: Figures from experience for the necessary input
delay
3.4.10 Checking of the monitoring case switching
To check the switching between monitoring cases, configure a series of
monitoring cases. Here you can define either an arbitrary sequence, a
unique sequence, or two alternative sequences.
Arbitrary sequence: It is allowed to switch from one monitoring case to
any other defined monitoring case.
Unique sequence: It is only allowed to switch from a monitoring case to
another specifically defined monitoring case.
Alternative sequence: It is allowed to switch from a monitoring case to
one of two specifically defined monitoring cases.
Figure 19: Schematic layout of the monitoring case switching
Within a monitoring case, the SafeZone multizone can monitor two
field sets simultaneously (e.g. hazardous area on the left and hazardous
area on the right). For this purpose choose any further field set with the
related monitoring case as the simultaneous field set.
3.4.11 Naming applications and laser scanners
A name can be assigned to the application configured and to the laser
scanner(s). The names are saved in the devices after the configuration is
transferred. The name chosen may, for example, be the identifier for the
system or the machine.
If you assign unique application names, you may “reserve” the devices for
certain duties. A machine maintenance person comparing exchanged
devices with the configuration data saved in the SCD software will be
notified that the application name does not match. He may then
exchange these devices for those with the correct application name.
3.5 Indicators and outputs
3.5.1 LEDs and 7-segment display
The LEDs and the 7-segment display indicate the operational status of
the SafeZone safety laser scanner. They are on the front face of the safety
laser scanner. Above the LEDs there are symbols that are used in the
remainder of these operating instructions to describe the LEDs.
Figure 20: Operational status indicators on the SafeZone safety laser
scanner
The symbols have the following meaning:
Switching method
Input delay required
Electronic switching using controller or complementary electronic
outputs with 0 to 10 ms bounce time
10 ms
Contact (relay) controls
30…150 ms
Control using independent sensors
130…480 ms
Recommendation
Use the checking of the monitoring cases as
an additional medium to exclude risks. For
example, deviations of a vehicle from a
corridor or a plant from the stipulated
production process can be detected.
Arbitrary sequence
Unique sequence
Alternative sequence
You configure a monitoring case with simultaneous
field set in the SCD.
You can enter the application or scanner names in the
SCD software (device symbol SafeZone safety laser
scanner system, context menu Configuration draft,
Edit…, file card Application).
OSSDs deactivated (e.g. if object in the protective safety
field, reset necessary, lock-out)
Reset required