Siemens SIMATIC ET 200AL, System Manual

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Counting
Digital input/Digital output module DIQ 16x24VDC/0.5A 8xM12 (6ES7143-5AH00-0BA0)
Equipment Manual, 08/2021, A5E38688112-AD
31
Comparison value
You specify a comparison value that controls the associated count output independently of
the user program.
The comparison value can be parameterized and can be changed with the user program
during runtime.
Gate control
Together with the hardware gate the software gate forms the internal gate. The module only
counts when the internal gate is open.
You control the HW gate externally via the digital inputs DI
4
and DI
6
. You control the SW gate
via the user program. You can activate and use the hardware gate in the 2xCount
configuration method by using parameterization.
Counting direction
The counting direction is specified either by the direction of the respective counter or via the
parameter assignment of the counter.
You control the counting direction via the digital inputs DI
5
and DI
7
. You can activate and use
the direction inputs in the 2xCount configuration method by using parameterization.
Overview of configuration methods
The following table shows a list of the channel properties for the configuration methods
2xCount and 4xCount.
You can count with DI
0
and DI
2
(configuration method 2xCount) or respectively with DI
0
, DI
2
,
DI
4
and DI
6
(configuration method 4xCount).
Table 4- 1 Configuration methods of the DIQ 16x24VDC/0.5A 8xM12
Property Configuration method
2xCount (Page 32) 4xCount (Page 52)
Number of counters 2 4
Counter width, max. counting frequency 32 bits, 2 kHz 32 bits, 2 kHz
Counter inputs Channels 0, 2 Channel 0, 2, 4, 6
Count outputs Channel 1, 3 Channel 1, 3, 5, 7
Input for gate stop / start
1
Channel 4, 6 -
Input for counting direction
1
Channel 5, 7 -
Number of freely parameterizable chan-
nels
8 8
Parameterizable input delay
2
0.05 ms .. 20 ms 0.05 ms .. 20 ms
Process data
length
Inputs 14 bytes 26 bytes
Outputs 14 bytes 26 bytes
1
= Can also be used as default digital inputs via the parameter assignment as "Digital input without
function".
2
= Only values as of 1.6 ms can be parameterized as the input delay for Channels 8..15.