Substitute Value Behavior (Failsafe Behavior) - Bosch Rexroth IndraControl S20 System And Installation Manual

DOK-CONTRL-S20*SYS*INS-AP02-EN-P
IndraControl S20 System and Installation
13.6

Substitute value behavior (failsafe behavior)

The substitute value behavior defines the module behavior when process data is
missing.
Once a module has exchanged valid process data for the first time after switching
on the power supply, the substitute value behavior is activated.
If valid process data is missing (e.g., in the event the connection is aborted), the
module changes to the substitute value behavior.
Typically, the substitute value behavior is parameterized using the engineering
tool or object 0024 "Substitute value behavior when process data is missing".
hex
The following values are available:
Code (hex) Behavior
0000 Output of zero values
0001 Output of final values
0002 Hold last value
0003 Substitute value
Fig. 13-16 Possible settings for the substitute value behavior
To determine whether, and if yes, which substitute value behavior can
be parameterized for a module, please refer to the module-specific
data sheet.
For digital modules of the IndraControl S20 system, the outputs are al-
ways reset to "0 in the event of a local bus or U
Bosch Rexroth AG
Substitute value behavior (failsafe behavior)
Example: S20-AO-4
Output of zero values (0 V/0 mA/4 mA) at the
output
Output of final values (10 V/5 V/20 mA) at the
output
Hold last value
Acceptance of substitute values of the "Substi-
tute OUT process data" object (002F
failure.
O
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)
hex