7.6.4
Diagnostics
Overview
The process data status bits can be used as input elements for the logic.
Important information
WARNING
Ineffectiveness of the protective device due to the use of non-safe diagnostic data for
safety-related applications
The dangerous state may not be stopped or not be stopped in a timely manner in the
event of non-compliance.
b
Use non-safe process data status bits for diagnostic purposes only.
Process data status bits of the modules
Table 123: Process data status bits of the modules
Process data status
bits
Value
Description
Voltage supply of out‐
puts
(for modules with
safety outputs only)
0
Voltage supply of the outputs is outside the specified range,
fault switch-off due to short-circuit to VCC or cross-circuit to
other outputs.
1
Voltage supply of the output is OK
Input data status
0
One or more input bits of the associated module have been
set to 0 because an error has been detected (e.g., cross-cir‐
cuit or communication error). I.e., the input bits may have
different values than would normally be the case during
error-free operation.
1
Inputs of the associated module are OK
Output data status
0
An error has been detected at one or more outputs of the
associated module (e.g., overload, short-circuit or communi‐
cation error). I.e., the outputs may have different values than
would normally be the case during error-free operation.
1
Outputs of the associated module are OK
Process data status bits of the individual inputs or outputs
Table 124: Process data status bits of the individual inputs or outputs
Process data status
bits
Value
Description
Fast shut off control
0
Error or timeout in fast shut-off logic
1
Fast shut-off logic is OK
Status Ix, Iy
Dual-channel evalua‐
tion
0
Error at the inputs
The input value is 0, regardless of the level at the terminals.
1
Dual-channel evaluation of Ix/Iy input is OK
Status Ix
0
Error at the input
The input value is 0, regardless of the level at the terminals.
1
Input is OK
Status Qx
Short-circuit to High
0
Output voltage level is High instead of Low when the output
is “Off”. With test pulses, also in case of short-circuits to VCC
or cross-circuits to other outputs.
All safety outputs of the module are “Off”, regardless of the
logic result.
1
Output is OK
7
CONFIGURATION
106
O P E R A T I N G I N S T R U C T I O N S | Flexi Compact
8024589/2020-11-10 | SICK
Subject to change without notice