Siemens SIMATIC CM35, Manual

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5-18
CM35 Counter Module
(4) J31069-D0416-U001-A5-7618
5.6 Reading the Counting Values
In ² pulse counter ² mode, you can read the current counting values from the
CM35.
To ensure data consistency, the read--access must be performed with
one load
command (L PIW).
Table 5-15 shows the addresses of the individual channels for reading the
counting value.
Table 5-15 Assignment of the output area for reading the counting values
Offset to the
Module Start Address
Meaning Value Range
+0 Counting value,
channel 1
0 to 65535
+2 Counting value,
channel 2
+4 Counting value,
channel 3
+6 Counting value,
channel 4
+8 Counting value,
channel 5
+10 Counting value,
channel 6
+12 Counting value,
channel 7
+14 Counting value,
channel 8
Example: ² Pulse counter ² mode
- Read counting value of counting channel 4
- The CM35 has the module start address 256.
L PIW 262 // Address = 256 + 6, counting value of
channel 4
T MW16 // Save the counting value
Pulse Counter Operating Mode