Instruction manual

Functions
25
TNT 35/7-24V
4.5 Field pair switchover
The Safety Sensor has four or eight field pairs. Switchover between the field pairs
is possible at all times, provided the operating situation allows this.
During the switchover process the Safety Sensor monitors the field pair activated
before the switchover until a new one has been clearly activated.
Use the field pair switchover when the danger zones vary depending on the
activity of the machine or the operating status, e.g. automated guided vehicle
systems (AGVs), to control the protective field switchover for straight and curved
stretches.
If the rules for field pair switchover are not complied with, the Safety Sensor
signals a fault and the machine stops.
Using field pair switchover
You can configure and switch over the field pairs according to the different
requirements. The switchover is performed via the corresponding control inputs
on the X1 interface.
The precepts for the switchover depend on the amount of the selected field pairs
and their numbers. The activated field pair must correspond with the respective
operating mode. The time of the switchover must correspond with the machine's
risk assessment. You must take the braking distances, response times and
machine stopping times, e.g. influenced by overlapping protective fields, into
account.
If these rules are not complied with, the Safety Sensor goes to a fault status within
40 ms. The green LED 1 flashes with 2 Hz.
The following rules apply for switching over four field pairs:
• First the control unit must switch to a new field pair before it switches of the
previous one.
• The switchover must be made within 1 sec. Both field pairs are monitored
during the switchover time.
• All field pairs must never be deactivated during the switchover.
• The switchover process performed by the control system must agree with
the Safety Sensor's configuration. This configuration is specified with the
configuration and diagnostics software.