Triggering Of A Diagnostics Interrupt; Triggering A Hardware Interrupt - Siemens SIMATIC ET 200SP Manual

System diagnostics
STEP 7 (TIA Portal) offers innovative system diagnostics for the devices of the S7-1500 (IO
controller CPU S7-1500) and the ET 200SP (IO device) automation system. Independent of
the cyclic user program, messages are made available on the display of the CPU S7-1500,
the CPU web server and the HMI device.
For more information on system diagnostics, refer to the System Diagnostics function
manual. (http://support.automation.siemens.com/WW/view/en/59192926).
5.2.1

Triggering of a diagnostics interrupt

Triggering of a diagnostics interrupt
For an incoming or outgoing event (e.g. wire break on a channel of an I/O module), the
module triggers a diagnostics interrupt if this is configured accordingly.
The CPU interrupts the processing of the user program and processes the diagnostics
interrupt (OB 82). The event which led to the interrupt is entered in the start information of
the diagnostics interrupt (OB 82).
5.2.2

Triggering a hardware interrupt

Triggering a hardware interrupt
During a hardware interrupt, the CPU interrupts the processing of the user program and
processes the hardware interrupt block (e.g., OB 40). The event that triggered the interrupt is
entered in the start information of the hardware interrupt block.
Note
Diagnostics "Hardware interrupt lost" (from I/O module)
Avoid creating hardware interrupts cyclically.
If the hardware interrupt load is too high, hardware interrupts can get lost depending on the
number of I/O modules and the communication load.
IM 155-6 PN HS interface module (6ES7155-6AU00-0DN0)
Manual, 09/2016, A5E34928647-AA
Interrupts, diagnostics, error, and system messages
5.2 Interrupts
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