SICK nanoScan3 I/O

Further topics
•
"D
ata sheet", page 111
•
"Electrical installation", page 50
•
"Inputs and outputs, local", page 74
4.4.4.1 Static control inputs
Overview
T
he static control inputs support the following evaluation methods:
•
Complementary evaluation
•
1-out-of-n evaluation (only devices with several static control inputs)
Complementary evaluation
A s
tatic control input consists of 2 channels. The channels of a static control input are
switched inversely. The following table shows which status the static control input’s
channels must have to define logical input condition 1 and 0 at the relevant control
input.
Table 3: Status of the channels of the control inputs with complementary evaluation
A1 A2 Logical input status (input A)
1 0 0
0 1 1
1 1 Error
0 0 Error
1-of-n evaluation
W
ith the 1-out-of-n evaluation, each channel of a control input is considered individu‐
ally. At any time, exactly one channel must have logic value 1.
Table 4: True vales with 1-off-n-evaluation with 2 input pairs (example)
A1 A2 B1 B2 Result (e.g. monitoring case no.)
1 0 0 0 1
0 1 0 0 2
0 0 1 0 3
0 0 0 1 4
Other input conditions Error
4.4.4.2 Dynamic control inputs
Overview
A d
ynamic control input receives speed information from an incremental encoder.
Important information
WARNING
F
ailure of both encoders due to a common cause
If both encoders fail at the same time, the device will receive no speed information.
Therefore, the device switches to the monitoring case defined for standstill, although
the vehicle may be moving.
b
Exclude faults with a common cause in the encoders.
PROJECT PLANNING 4
8024596/15VP/2019-11-15 | SICK O P E R A T I N G I N S T R U C T I O N S | nanoScan3 I/O
39
Subject to change without notice