8.3.11 Evaluating interrupts of device-related diagnostics
The structure of the device-related diagnostics is the same as the structure of the interrupt
section.
Interrupts
The ET 200PA SMART supports the following interrupts:
● Diagnostic interrupt
● Plug/pull interrupt
You can evaluate these interrupts in the DP master. In the event of an interrupt, interrupt OBs
run automatically in the master CPU (refer to the "System and Standard Functions for
S7-300/400 (http://support.automation.siemens.com/WW/view/en/1214574)" programming
manual).
Plug/pull interrupt
Plugging and pulling of modules in an ET 200PA SMART system is only possible when the
"Module replacement in runtime" parameter is enabled. If a module is pulled when the "Module
replacement in runtime" parameter is not enabled, the complete ET 200PA SMART station fails.
If you are using the ET 200PA SMART with the "Module replacement in runtime" parameter
enabled, the system behaves as follows:
● When a module is pulled, the IM 650 signals a pulled interrupt to the DP master, which
executes OB 83. You program the desired response to the module pulled event in OB 83.
In case of I/O access, OB 122 (I/O access error) is called in the DP master CPU.
● If you plug in a module that matches the configuration, the IM 650 signals a plugged interrupt
to the DP master (call of OB 83 with corresponding diagnostic buffer entry) and assigns the
module parameters in accordance with the saved configuration.
● If you plug a module into a non-configured slot or a module that does not match the
configured module, the IM 650 signals a plugged interrupt but ignores the inserted module.
– The identifier-related diagnostics enables you to read the slot in which the wrong module
is plugged.
– The IM 650 indicates the error via the SF LED.
Note
Disturbances from module removal and insertion are tolerated for up to 1 second. This means
that if this type of disturbance occurs, the output values are not changed within the tolerance
time.
Interrupt, error and system messages
8.3 S7 diagnostics
ET 200PA SMART
Operating Instructions, 06/2019, A5E34192013-AB 115
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