SICK safeVisionary2 - Status of the Channels of the Control Inputs with Complementary Evaluation; True Vales with 1-Off-N-Evaluation with 2 Input Pairs (Example)

Prerequisites
•
T
he safety-related parts of the controller that switch the active protective field
provide the same safety level as the safety function.
•
Manual switching that depends on the operating mode is carried out using a
suitable manual control switch.
Further topics
•
"D
ata sheet", page 90
•
"Electrical installation", page 53
•
"Inputs and outputs, local", page 70
4.4.4.1 Static control inputs, Parity inputs
Overview
T
he static control inputs support the following evaluation methods:
•
Complementary evaluation
•
1-of-n evaluation
The parity inputs support the following evaluation methods:
•
Parity check
Complementary evaluation
A s
tatic control input consists of 2 channels in the case of complementary sampling.
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 15: 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 16: 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
Parity check
Y
ou can use 3channels or 4channels for the parity check. This gives 4 or 8monitoring
cases, respectively. The following tables show what state the channels of the static
control input must have in order to obtain a valid input combination.
4 P
ROJECT PLANNING
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O P E R A T I N G I N S T R U C T I O N S | safeVisionary2 8025919/1I9E/2023-01-09 | SICK
Subject to change without notice