Test/Commissioning/
Diagnostics
76
04/99 AWB 2700-1311 GB
Diagnostics Status information is scanned hierarchically via the
diagnostic status word and the station’s diagnostic
bytes, as well as the diagnostic bytes of any local
expansion modules connected to it.
Diagnostic status word
The diagnostic status word provides an overview of
the various error messages. It consists of 16 bits. The
diagnostic bits are subdivided into two categories:
Category D (diagnostics):
Category E (errors):
The category D diagnostic bits are for information.
They can be displayed if the PLC is in the “Run” or
“Ready” state.
Category E diagnostic bits switch the PLC to the
“Not Ready” state when they appear.
In Sucosoft S 40, diagnostic bits are displayed in the
“System diagnostics” window (see the “Test and
Commissioning” chapter of AWB 2700-1305-GB).
The diagnostic bits can also be displayed via the
input LEDs on the PLC using the follow procedure:
왘 Set the operating mode selector switch to “Halt”
(stop) and refer to the following tables to interpret
the operating state (do not press the “reset”
button and the PLC will remain in the “Run” state).
Set the operating mode selector switch to “Run”
or “Run/M reset” and press the “reset” button to
acknowledge the error message.
H1311g.bk Seite 76 Freitag, 4. Juni 1999 1:12 13
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