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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 | safeRS3
8027489/2022-03-01 | SICK
Subject to change without notice
4 GET TO KNOW SAFERS3
Condition
Input variable behavior
Output behavior
IOPS (PLC provider status)
= bad
the last valid value of the input
variable is retained
the system keeps working in its
normal operating state
Connection loss
the last valid value of the input
variable is retained
the system keeps working in its
normal operating state
After power-up
the initial values (set to 0) are
used for the input variables
the system keeps working in its
normal operating state
If at least one digital input or OSSD is configured as
Fieldbus controlled
, the behavior
of the input variables is as described below:
Condition
Input variable behavior
Output behavior
IOPS (PLC provider status)
= bad
the last valid value of the input
variable is retained
the system keeps working in its
normal operating state
Connection loss
the last valid value of the input
variable is retained
the system transits to safe state,
deactivating the OSSDs, until the
connection is re-established.
After power-up
the initial values (set to 0) are
used for the input variables
the system remains in a safe
state with the OSSDs
deactivated, until the input data
are passivated.
4.2.8
SNS input
The control also has an
SNS
input (high logic level (1) = 24 V) to check the correct
functioning of the chip that detects the status of the inputs.
NOTICE
If at least one input is connected, the SNS input "V+ (SNS)" and the GND input "V- (SNS)"
must also be connected.
4.2.9
Outputs
The system has four digital OSSD short-circuit protected outputs that can be used
individually (non safe) or can be programmed as dual channel safety outputs (safe) in
order to ensure the system safety level.
An output is activated when it switches from OFF to ON-state and it is deactivated when
it switches from ON to OFF-state.
The function of each digital output must be programmed through the safeRS3 Designer
application.
The available functions are the following:
l
System diagnostic signal
: switches the selected output to OFF-state when a system
fault is detected and switches all the OSSD related to detection signals, if any, to
OFF-state.
l
Muting enable feedback signal
: switches the selected output to ON-state in the
following cases:
o
when a muting signal is received over the configured input and at least one
group is in muting