Siemens Simatic S7-1500 Manual - Page 31

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Siemens Simatic S7-1500 Manual
Behavior when a counting limit is exceeded - Continue counting
The following section describes the effects of the parameter "Behavior when a counting limit
is exceeded = Continue counting". To control the counter, the bits of the control byte of the
control interface are used, see section Address space Counting mode (Page 26), subsection
Control interface.
Counting begins at the current counted value (the SW-GATE is set in the control byte). Bit
sequence in the control byte of the control interface 0000 1000.
After the high counting limit is exceeded, the counted value jumps to the low counting
limit = 0 and counting is continued.
If the SW_GATE bit is reset in the control byte of the control interface before reaching the
high counting limit, counting is stopped.
The following figure shows an example of the principle of continuing counting when a
counting limit is exceeded.
Figure 4-10
Principle: Continue counting
DI 32x24VDC HF digital input module (6ES7521-1BL00-0AB0)
Manual, 09/2016, A5E03485935-AF
Parameters/address space
4.2 Address space
31