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Comparison value/
start value
CM35 Counter Module
(4) J31069-D0416-U001-A5-7618
When you specify the counting direction, you determine how the comparison
value/start value parameter will be used.
Counting up:
The transferred value is the comparison value.The following happens when a
counter is started.
- - Counting begins with the start value ²0.²
- - The counting value is incremented with each encoder pulse.
When the counting value reaches the specified comparison value, the para-
meterized reactions are triggered (e.g., reset digital output, trigger hardware
interrupt).
Counting down:
The transferred value is the start value. The following happens when a count-
ing procedure is started.
- - The counting value is set to the specified start value.
- - The counting value is decremented with each encoder pulse.
When the counting value reaches the comparison value ²0,² the parameter-
ized reactions are triggered (e.g., reset digital output, trigger hardware inter-
rupt).
The comparison value/start value can be specified for a specific channel.
Table 5-3
Comparison and start value
Variable:
Comparison or Start Value
(Depending on Direction of
Counting)
Cmp_Start_Value_Chan_1
Cmp_Start_Value_Chan_2
Cmp_Start_Value_Chan_3
Cmp_Start_Value_Chan_4
Cmp_Start_Value_Chan_5
Cmp_Start_Value_Chan_6
Cmp_Start_Value_Chan_7
Cmp_Start_Value_Chan_8
Pulse Counter Operating Mode
Parameter
Offset
Block
1
2.0
1
4.0
1
6.0
1
8.0
1
10.0
1
12.0
2
2.0
2
4.0
Data
Value
Type
Range
Word
0 to 65535
Word
Word
Word
Word
Word
Word
Word
5-5
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