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Period Duration Measurement Operating Mode
6.6
Reading the Measured Values
6-10
You can read the current measuring values of the CM35 in ²period duration
measurement² mode.
To ensure data consistency, the read access must be performed with one load
command (L PIW).
When an overflow occurs, the hex value FFFDH (65533) is transferred (fre-
quency below the minimum frequency, encoder interrupted, and so on).
Measuring channels which have not yet been started are transferred with the
value 0000H regardless of whether or not pulses are present on the input.
Table 6-8 shows the addresses of the individual channels for reading the mea-
sured value.
Table 6-8
Assignment of the output area for reading the measured values
Offset to the
Module Start Address
+0
Period duration average value, chan. 1
+2
Period duration average value, chan. 2
+4
Period duration average value, chan. 3
+6
Period duration average value, chan. 4
+8
Period duration average value, chan. 5
+10
Period duration average value, chan. 6
+12
Period duration average value, chan. 7
+14
Period duration average value, chan. 8
Example:
²Period duration measurement² mode
- - Read the measured value of channel 2
- - The CM35 has the module start address 256.
L
PIW 258
T
MW16
Meaning
// Address = 256 + 2, measured value
channel 2
// Save the counting value
CM35 Counter Module
(4) J31069-D0416-U001-A5-7618
Value Range
0 to 65532
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