Omron OS32C Series User Manual

28
Chapter2
OS32C
User’s Manual
Operating States & Output Modes
Fig. 2-11 Object detection in Zone set B.
From the diagram, there is a period of time, Textend. Between tmin and tEndZoneA, where the system may
have switched to Zone set B already but it needs to protect Zone set A. This is covered in the following
section.
 How to Guarantee Protection of Original Zone Set
Additional measures may be necessary to ensure that Zone set A maintains adequate monitoring up to
t
EndZoneA.
With t
start established relative to tDangerZoneB, we must compare tEndZoneA and tmin.
Case 1. Zone set switching after the monitoring of zone set A is no longer required (tEndZoneA  tmin)
When t
EndZoneA  tmin, no further modifications are necessary. Zone set A will be properly monitored for
the duration that is needed.
Case 2. Zone set may be switched before the monitoring of zone set A is no longer required (tEndZoneA > tmin)
When t
EndZoneA > tmin, measures must be taken to ensure that Zone set A is protected even when the
monitoring zone is switched to zone set B before t
EndZoneA. A simple measure is to modify safety
distance (S) used when defining Zone set A such that it includes an additional component (Z
extra)
defined by the maximum approach speed (K) and a worst case extension time (T
extend) to account for
the time that Zone set A may not be monitored.
Z
extra = K * Textend = K * (tEndZoneA - tmin)
Expanding monitoring zone using this additional parameter Z
extra enables the OS32C to detect an
object in advance that may enter the actual monitoring zone of zone set A during zone set switching. In
other words, expanding the monitoring zone means that the timing of t
EndZoneA is shifted to tmin.
t
start
Start
switching
t
min
=
t
start
+ T
delay
-T
tol
Object detected
(earliest)
t
maxToOff
=
t
start
+ T
delay
+ T
tol
+
T
response
+ T
sample
Object detected
(latest)
T
delay
Zone set BZone set A
T
sample
Zone set A
OR
Zone set B
time
T
tol
T
delay
T
tol
T
response
t
DangerZoneB
t
EndZoneA
T
extend
T
maxReaction

Omron OS32C Series Specifications

General

Response Time	80 ms
Type	Safety Laser Scanner
Protection Structure	IP65
Safety Category	Type 3
Power Supply	24 VDC
Interface	Ethernet/IP, PROFINET
Operating Temperature	-10°C to 50°C
Output	OSSD
Communication	Ethernet/IP
Configuration	Via software
Warning Zone	Configurable