Siemens Simatic S7-1500 Manual - Page 26

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Siemens Simatic S7-1500 Manual
Parameters/address space
4.2 Address space
4.2.2

Address space Counting mode

Address space for configuration as 1 x 32-channel DI 32x24VDC Count
The address space of channel 0 and channel 1 used for counting consists of the control and
feedback interface. The Count function is controlled directly via the two interfaces. With
suitable parameter assignment, a hardware interrupt is triggered.
If you use the module in the "Counting mode" (channels 0 and 1), the module occupies the
following address areas:
● 16 bytes in the process image output (control interface).
● 24 bytes in the process image input (feedback interface).
Control interface
The following figure shows the address assignment of the module in the process image
output. You use the control interface for example to start the counter or to set the counter
value. With the "SW gate" control bit you open and close the software gate of the
corresponding channel.
Figure 4-5
26
Assignment of the address space of the control interface of the DI 32x24VDC Count
(bytes 0 to 7)
DI 32x24VDC HF digital input module (6ES7521-1BL00-0AB0)
Manual, 09/2016, A5E03485935-AF