Notes on operation
4.2 Display "Existing channel error" in the diagnostics interrupt OB (OB82)
CP 443-5 Extended
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Manual, 11/2018, C79000-G8976-C162-09
4.2
Display "Existing channel error" in the diagnostics interrupt OB
(OB82)
Display "Existing channel error" in the diagnostics interrupt OB (OB82)
Under certain circumstances, the "Existing channel error" flag may not be set (false)
although there is a channel error.
This reaction corresponds to the current response on the PROFIBUS interfaces with
SIMATIC.
Remedy: You can read out detailed up-to-date diagnostics information using the diagnostics
function "Read system diagnostics" SFC13 (read out standard diagnostics).
4.3
Display of the the DP slave history
Restricted display of older diagnostics data in STEP 7 special diagnostics
Diagnostics data can be read out in STEP 7 special diagnostics. With an additional button,
you can also have older diagnostics data displayed alongside the current diagnostics data.
With the CP 443-5 Extended (DX05), it is possible that not all the older diagnostics events
can be displayed due to the limited buffer size - the display of underlying intermediate states
is then omitted.
4.4
Other information available about the CP
FAQs on the Internet
You will find detailed information (FAQs) on using the PROFIBUS S7-CPs at the following
Internet address (entry type: FAQ):
Link: (
