Behavior In Case Of Error; Channel Errors; Channel Pair Errors - WAGO 750 Manual

WAGO I/O System 750
753-661/000-004 4FDI 24V PROFIsafe
8.3

Behavior in Case of Error

The behavior of the F I/O module in case of error depends on the type of error
and is described below:
• Channel error
• Channel pair error
• Module error
• Configuration/communication error
8.3.1

Channel Errors

In case of channel error, the corresponding bit in the channel status byte is set to
the value "Bad" (0). A safe substitute value (0) for the faulty passivated input
channel in the process image is transferred to the safe PLC.
The channel status LED shines red continuously. A diagnostic message
corresponding to the error appears (see section "Diagnostics" > ... > "Error
Diagnostics"). With dual-channel pre-evaluation, the channel status of the second
channel is also set to the value "Bad" (0), which leads to passivation of both
channels of the channel pair.
8.3.2

Channel Pair Errors

In the event of a channel pair error, the respective bits of the channel pair in the
channel status byte are set to "Bad." Safe substitute values (0) are transferred to
the safe PLC for the faulty passivated channel pair in the process image.
The module error LED shines red continuously. A diagnostic message
corresponding to the error appears (see section "Diagnostics" > ... > "Error
Diagnostics").
Version 1.0.0, valid from HW/SW Version 01/01
Diagnostics 85
Manual