Specifications

Interrupts/diagnostics alarms
5.2 Interrupts
DI 32x24VDC HF digital input module (6ES7521-1BL00-0AB0)
Manual, 04/2015, A5E03485935-AE
39
Structure of the additional interrupt information
Table 5- 4 Structure of USI = W#16#0001
Data block name
Contents
Comment
Bytes
USI
(User Structure Identifier)
W#16#0001 Additional interrupt info for hardware interrupts
of the I/O module
2
The channel that triggered the hardware interrupt follows.
Channel
B#16#00 to B#16#1F Number of the event-triggering channel
(channel 0 to channel 31 of the module)
1
It follows the error event that triggered the hardware interrupt.
Event
B#16#01
Rising edge
1
B#16#02
Falling edge
B#16#05 Comparison event occurred for DQ (only in
"Counting mode")