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Bosch Rexroth AG
Product description
Desig-
Color
nation
00-07
Green
Fig. 3-5
Overview of diagnostics LEDs [...]
3.7
Safe state
3.7.1
Operating state
3.7.2
Error detection in I/O devices
Inputs
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State
Description
Status of each input from 0 - 7
OFF
Input at logic "0"
Green ON
Input at logic "1"
The safe state for the module is the transmission of the value "0" in the image of
the inputs to the safe controller.
The safe state for the F-Input data is "0".
Passivation results in a change to the safe state: see
page
84.
The safe state can be entered in the following cases:
1.
Operating state
2.
Error detection in I/O devices
3.
Device errors
4.
Parameterization errors
5.
Error detection during safe communication
In the operating state, the inputs can enter states "1" or "0". State "0" is the safe
state.
If an error is detected at an input, the safe state is set at this input and a "0" is rep-
resented in the process image of the input ("0" = safe state).
Operating time in the error state:
If an error state is entered on the modules, this error must be as-
sessed, acknowledged or removed by the user within 72 hours. This
action ensures the safe operating state of the module. In the error
state, internal module tests are no longer run and it is possible that the
safe state may be exited due to an accumulation of errors.
Depending on the parameterization, the following errors can be detected at inputs:
•
Short circuit
•
Cross-circuit
•
Overload/short circuit of the clock outputs
The diagnostic message is transmitted to the controller: see
and removal" on page
nection examples for safe inputs" on page
DOK-CONTRL-S20*PSDI*8*-AP02-EN-P
IndraControl S20 Module With Safe Digital Inputs S20-PSDI-8/4
65. Information on which errors occur and when: see
37.
"Passivation" on
"Errors: messages
"Con-
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