Interrupts/diagnostics alarms
6.2 Interrupts and diagnostics
CPU 1512C-1 PN (6ES7512-1CK01-0AB0)
140
Manual, 12/2017, A5E40898741-AA
Hardware interrupts when using the high-speed counters
Table 6- 15 Hardware interrupts and their meaning
Hardware interrupt
Event type
number
Meaning
Opening of the internal gate (gate start)
1
When the internal gate is opened, the technology function
triggers a hardware interrupt in the CPU.
Closing of the internal gate (gate stop)
2
When the internal gate is closed, the technology functions
trigger a hardware interrupt in the CPU.
Overflow (high counting limit violated)
3
When the count value exceeds the high counting limit, the
technology function triggers a hardware interrupt in the
CPU.
Underflow (low counting limit violated)
4
When the count value falls below the low counting limit, the
technology function triggers a hardware interrupt in the
CPU.
Comparison event for DQ0 occurred
5
When a comparison event for DQ0 occurs due to the se-
lected comparison condition, the technology function trig-
gers a hardware interrupt in the CPU.
When the change of the count value for an incremental or
pulse encoder was not caused by a count pulse, the tech-
nology function does not trigger a hardware interrupt.
Comparison event for DQ1 occurred
6
When a comparison event for DQ1 occurs due to the se-
lected comparison condition, the technology function trig-
gers a hardware interrupt in the CPU.
When the change of the count value for an incremental or
pulse encoder was not caused by a count pulse, the tech-
nology function does not trigger a hardware interrupt.
Zero crossing
7
At a zero crossing of the counter or position value, the
technology function triggers a hardware interrupt in the
CPU.
New Capture value present
1)
8
When the current counter or position value is saved as a
Capture value, the technology function triggers a hardware
interrupt in the CPU.
Synchronization of the counter by an exter-
nal signal
9
At the synchronization of the counter by an N signal or
edge at DI, the technology function triggers a hardware
interrupt in the CPU.
Direction reversal
2)
10
When the count value or position value changes direction,
the technology function triggers a hardware interrupt in the
CPU.
1)
Can only be set in counting mode
2)
Feedback bit STS_DIR is preset to "0". When the first count value or position value change occurs in the reverse direc-
tion directly after switching on the digital on-board I/O, a hardware interrupt is not triggered.
Summary of Contents for Simatic S7-1500 CPU 1512C-1 PN
Page 1: ......
