Product Description
22
Bosch Rexroth AG
DOK-CONTRL-ILPSDO8****-AW04-EN-P
Rexroth Inline Module with Safe Digital Outputs R-IB IL 24 PSDO 8-PAC
3.7
Safe State
The safe state for the module is the low state at the output terminals (see
“Safe Digital Outputs” on page 18
).
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
3.7.1
Operating State
In the operating state, the outputs can enter states “1” or “0”. In general, state “0”
is the safe state.
3.7.2
Error Detection in I/O Devices
Outputs
If an error is detected at an output, the affected output is disabled (“0” = OFF = safe
state).
Depending on the parameterization, the following errors can be detected at
outputs:
•
Short circuit
•
Cross circuit
•
Overload
The relevant diagnostic message is transmitted to the safe controller (see
“Safe Digital Output Errors” on page 57
). For information about which errors are
detected and when, please refer to
“Connection Examples for Safe Outputs” on
PROFIsafe:
The safe state for the F-Output data is “0”.
The safe state is entered by means of passivation (see
).
No communication; loss of the safety function
possible due to undetected accumulation of
errors
If there is no communication with the safe controller: Disconnect the module from
the supply voltage after a maximum of eight hours.
WARNING
If an error occurs on a channel of an output parameterized as “two-
channel”, the other corresponding channel also enters the safe state.
