Fig. 25 Maximum Permissible Sensor Self-Test Duration Of 350 Μs - Beckhoff EL1904 Operating Instructions Manual

Operation
PrmName Meaning
Sensor test The clock signal for connection Input3+
channel 3 active is checked at connection Input3-.
Sensor test The clock signal for connection Input4+
channel 4 active is checked at connection Input4-.
Logic channel 1 Logic of channels 1 and 2
and 2
Logic channel 3 Logic of channels 3 and 4
and 4
Store Code This parameter is required for the
TwinSAFE Restore Mode
Project CRC This parameter is required for the
TwinSAFE Restore Mode
5.4.5.1 EL1904 configuration for light barriers, light grids, light curtains etc.
The EL1904 also supports direct connection of contact-free protective devices with two self-testing outputs
such as light barriers, light grids, light curtains, laser scanners, etc.
Sensors with self-testing outputs!
Only sensors with self-testing outputs and a maximum sensor self-test duration of 350 µs may be
connected to the EL1904 (see illustration below).
Fig. 25: Maximum permissible sensor self-test duration of 350 µs
Parameter
To connect these sensors please set the following parameters for the EL1904 in the TwinCAT System
Manager:
44
Values
true / false
true / false
• single logic
• asynchronous repetition OSSD (sensor
test must be switched off)
• any pulse repetition OSSD (sensor test
must be switched off)
• short cut is no module fault
• single logic
• asynchronous repetition OSSD (sensor
test must be switched off)
• any pulse repetition OSSD (sensor test
must be switched off)
• short cut is no module fault
0x0000
0x0000
CAUTION
Version: 3.0.0 EL1904