I/O Module Diagnostics; Diagnostic Control Word - WAGO I/O-SYSTEM 750 Manual

130 Diagnostics
9.2

I/O Module Diagnostics

The fieldbus coupler provides the EtherCAT
diagnostic status of the I/O modules. The information is transmitted to the
EtherCAT
process image. The EtherCAT
display by means of a 16 bit word (diagnostic control word) in the output process
image.
The fieldbus coupler stores upstream diagnostic events, like, e.g. a line break
that occurred. Downstream diagnostic events are not recorded.
The fieldbus coupler has a buffer for recording diagnostic events. A maximum of
64 events can be stored in this buffer.
9.2.1

Diagnostic Control Word

The diagnostic control word is used to control I/O module diagnostics. The
diagnostic control word is located in the output process image and is transferred
from the EtherCAT
processes the diagnostic control word in every process data cycle.
Processing is delayed if the EtherCAT
If the EtherCAT
cycle time, processing is delayed until the fieldbus coupler has completed
its internal processing and can once again process the process data.
Manual
Version 1.2.1
750-354/000-001 EtherCAT® Fieldbus Coupler, ID Switch

master by means of a 16 bit word (diagnostic status word) in the input

®
master to the fieldbus coupler. The fieldbus coupler
®
cycle time is shorter than the fieldbus coupler's internal

master with information about the
master can control the diagnostic information
®
cycle time is short!
WAGO-I/O-SYSTEM 750