auto maskin DCU 305 R3 LT, Installation Manual, Page: 22 / 44

Page 22 (44)
Backup system configuration
Note
! The backup setting is automatically advised by the
configuration software Rudolf R3.
You may use these settings and skip this chapter entirely.
Overview
In the (unlikely) event of failure in the DCU 305 R3 main
microcontroller, the built-in backup system will detect this, and
activate the common alarm output relay.
Also, if the backup system fails, then the main microcontroller will
give the “Backup System Failure” alarm.
Note:
The backup system setting is calculated automatically by
Rudolf R3.
Set the DIP-switches according to the Rudolf R3 recommendation.
The backup system monitors all of the enabled switch inputs channels
1-6, and overspeed. These are the only channels on which the backup
system can act.
Note: The backup system activates if the main microcontroller fails
only. When the control panel is working normally, the backup system is
enabled , but not activated .
The working of the backup system can be observed on the back panel as
a slowly flashing (~1Hz) green LED. If the LED is flashing quickly,
(~4Hz) the backup system has detected a main microcontroller failure
and is activated.
What it does
If the backup system is activated and a genuine shutdown appears, it
activates the Stop and Shutdown outputs on terminal 42 and 44.
These outputs are held active for 2 minutes before being released.
Configuration of dipswitches
All configurations of the backup system are made using switch S1-S4
on the back-panel. There are three settings to be made:
• Set pulses/revolution using hex-switch S1 and S2 .
• Set the overspeed setpoint using hex-switch S3 .
• Enable shutdown switch channels by setting dipswitch S4 .