5-6
ET 200L, ET 200L-SC and ET 200L-SC IM-SC Distributed I/O Device
EWA 4NEB 780 6009-02c
5.2.1
General Remarks on Diagnostics
If you are operating the ET 200L-SC or ET 200L-SC IM-SC as a DP slave
with a SIMATIC S7/M7 DP master, the modules behave like S7 300 CPU
modules.
You read out the diagnosis (data record 0) with SFC 13, ”DPNRM_DG”.
If you are operating the ET 200L-SC or ET 200L-SC IM-SC as a DP slave
with another DP master for example, with an IM 308-C on a SIMATIC S5 –
you will find the slave diagnosis structure in Sections 5.2.2 to 5.2.6.
The ET 200L-SC or ET 200L-SC IM-SC supports diagnostic interrupts.
You can evaluate these types of interrupt with an S7/M7 DP master. In the
event of an interrupt, interrupt OBs run automatically in the CPU – refer to
the programmer’s manual, System Software for S7-300/S7-400, Program De-
sign).
If you are operating the ET 200L-SC or ET 200L-SC IM-SC with another DP
master, these interrupts are simulated within station diagnostics.
Note
In order to be able to evaluate diagnostic interrupts by means of a station
diagnosis with another DP master, you must take the following into account:
The DP master should be able to store diagnostic messages; this means
that diagnostic messages should be stored within the DP master in a ring
buffer store. If the DP master cannot store diagnostic messages, only the
latest diagnostic message to be received would always be stored, for
instance.
You have to poll regularly in your application the corresponding bits in
the station diagnosis. In doing so, you have to take into account the bus
run time of the PROFIBUS-DP so that you poll the bits at least once in
synchronization with the bus run time, for instance.
If the DP master sends an erroneous parameter assignment for the SC exten-
sion in the parameterization frame, the ET 200L-SC or ET 200L-SC IM-SC
responds with a diagnostic message – in the event of diagnostics being en-
abled. Owing to an internal processing time, the reply does not immediately
follow the parameterization frame, but there is a delay. In the start-up OB,
therefore, the diagnosis of the module should be read after a period of
approximately 100 ms to determine whether the ET 200L-SC or ET 200L-SC
IM-SC is operating properly.
If the ET 200L-SC or ET 200L-SC IM-SC is already exchanging data, all the
available SC inputs are supplied as zeros, and all the available SC outputs
remain at zero.
Diagnostics with
an S7/M7 DP
Master
Diagnostics with
Another DP Master
Diagnostic
Interrupt and
Process Interrupt
Diagnosis upon
Erroneous
Assignment of
Parameters
Diagnostics
g
Содержание Metro 21 M216KA
Страница 18: ...xviii ET 200L ET 200L SC and ET 200L SC IM SC Distributed I O Device EWA 4NEB 780 6009 02c Contents ...
Страница 34: ...1 16 ET 200L ET 200L SC and ET 200L SC IM SC Distributed I O Device EWA 4NEB 780 6009 02c Product Overview ...
Страница 56: ...2 22 ET 200L ET 200L SC and ET 200L SC IM SC Distributed I O Device EWA 4NEB 780 6009 02c Installation ...
Страница 86: ...4 6 ET 200L ET 200L SC and ET 200L SC IM SC Distributed I O Device EWA 4NEB 780 6009 02c Commissioning ...
Страница 102: ...5 16 ET 200L ET 200L SC and ET 200L SC IM SC Distributed I O Device EWA 4NEB 780 6009 02c Diagnostics g ...
Страница 112: ...6 10 ET 200L ET 200L SC and ET 200L SC IM SC Distributed I O Device EWA 4NEB 780 6009 02c General Technical Data ...