Datasensing SH4 BASE-STANDARD, Product Reference Manual, Page: 40 / 103

ALIGNMENT PROCEDURE
32
SH4 BASE-STANDARD
Alignment Procedure (Standard models only)
The ALIGNMENT function can be activated at power up keeping the RESET/RESTART sig -
nal (pin 1)
HIGH
for at least 0.5 s, as shown in the following timing diagram. When a
good state of alignment is reached a power OFF and a power ON operation carry back
the ESPE in normal operation.
In Alignment Mode ESPE is always in Safe State and the OSSDs are kept OFF.
The state of alignment is estimated from RX unit by reading the received signal level of
each beam. First and last beam received level gets some more weight.
LIGHT CURTAIN POWER SUPPLY
ON
RESET/RESTART SIGNAL
ALIGNMENT STATE
0.5 s
OFF
ACTIVE
INACTIVE
ON
OFF