Module Errors; Configuration/Communication Errors - WAGO 750 Manual

86 Diagnostics
8.3.3

Module Errors

In case of a module error, all bits in the channel status byte are set to "bad". For
all module errors requiring confirmation, safes substitute values in the process
image are transmitted to the safe PLC for all channels or channel pairs.
All other module errors lead to shutdown of the safe communication. All channel
status LEDs of the module are switched off permanently.
The module error LED shines red continuously or blinks red at a frequency of
2 Hz. A diagnostic message corresponding to the error appears (see section
"Diagnostics" > ... > "Error Diagnostics").
The clock outputs are switched off.
Behavior when module error LED flashing
A flashing module error LED (LED E) indicates that the F I/O module has
detected an internal safety-critical error. The cause can be a defect in the F I/O
module or an environmental EMC error. In this case, switch off the F I/O module
completely and then switch it back on. Defective firmware is detected via the
corresponding diagnostics (see section "Diagnostics" > "Error Diagnostics").
If the problem occurs repeatedly, this indicates a defect in the F I/O module. In
this case, return the F I/O module to WAGO GmbH & Co. KG for fault analysis.
Observe the notes in Section "Firmware Update."
8.3.4

Configuration/Communication Errors

In the event of a configuration or communication error, safe communication
between the F I/O module and the safe PLC is not possible.
The safe PLC sets all process values to substitute values for all input channels or
channel pairs.
The PROFIsafe status LED, local bus communication LED and parameterization
status LED assume states corresponding to the error.
The module error LED shines red continuously. A diagnostic message
corresponding to the error appears (see section "Diagnostics" > ... > "Error
Diagnostics").
The F I/O module 753-661/000-004 can be operated on the WAGO I/O
System 750 fieldbus couplers specified in section "Technical Data" > ... >
"Communication":
Manual
Version 1.0.0, valid from HW/SW Version 01/01
WAGO I/O System 750
753-661/000-004 4FDI 24V PROFIsafe