Interrupts - Siemens SIMATIC ET 200SP Manual

Operating mode DI
3.3 Interrupts/diagnostics alarms
3.3.2

Interrupts

The digital input module DI 8×24VDC HS supports hardware and diagnostics alarms in the
DI mode.
Diagnostic interrupts
The module generates a diagnostics interrupt at the following events:
● Channel temporarily unavailable
● Short-circuit
● Parameter assignment error
● No load voltage
● Hardware interrupt lost
Evaluating hardware interrupts with IO controller
The module generates a hardware interrupt at the following events:
● At rising edge (signal change from 0 to 1)
● At falling edge (signal change from 1 to 0)
If an interrupt occurs, a corresponding interrupt OB is called in the CPU of the IO controller.
S7-1500
Detailed information on the event is available in the STEP 7 online help.
The block interface is shown here with optimized block access, which is set in the TIA Portal
by default.
Name Data type
LADDR HW_IO
USI WORD
IChannel USInt
EventType Byte
28
Comment
Hardware identifier of the module triggering the interrupt
USI (High/Low)
Channel that triggered the hardware interrupt
Error event
Digital input module DI 8x24VDC HS (6ES7131-6BF00-0DA0)
Equipment Manual, 11/2019, A5E35243810-AD