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Operating Modes, parameters and commands
7.3 Count modes
FM 350-1 Counter module
Manual, 05/2011, A5E03648639-01
113
Switching to Comparison Values
Output DO1 switches at two comparison values if the following conditions are fulfilled:
●
You have set the behavior of DO0 to "Inactive".
●
You have set the behavior of DO1 to "Active for switching to comparison values".
●
You loaded both comparison values CMP_V1 and CMP_V2.
●
You have enabled output DO1 with CRTL_DO1.
The following table shows when DO1 is activated and deactivated:
Table 7- 22 Output DO1 Switch to comparison values
Comparison values
CMP_V1 and CMP_V2
DO1 is activated if
DO1 is deactivated if
CMP_V1 < CMP_V2
CMP_V1 ≤ Counter level ≤
CMP_V2
Counter level < CMP_V1
or
Counter level > CMP_V2
CMP_V1 = CMP_V2
CMP_V1 = Counter level =
CMP_V2
CMP_V1 ≠ Counter level ≠
CMP_V2
CMP_V1 > CMP_V2
Counter level < CMP_V2
or
Counter level > CMP_V1
CMP_V2 ≤ Counter level ≤
CMP_V1
The result of the comparison is indicated by the status bit STS_COMP2.
You cannot acknowledge and thus reset the status bit STS_COMP2 until the comparison
condition is no longer fulfilled.
The status of the DO1 output is indicated by the status bit STS_CMP2.
There is no hysteresis with this output behavior.
With this output behavior, it is not possible to control output DO1 with the SET_DO1 control
bit.
W
W
&03B9
&03B9
'2
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Figure 7-17 At the start of the counting process, V2 > V1
Содержание SIMATIC S7-300 FM 350-1
Страница 8: ...Table of contents FM 350 1 Counter module 8 Manual 05 2011 A5E03648639 01 ...
Страница 168: ...Encoder signals and their evaluation 8 4 Signal evaluation FM 350 1 Counter module 168 Manual 05 2011 A5E03648639 01 ...
Страница 186: ...Technical data 11 2 Technical data FM 350 1 Counter module 186 Manual 05 2011 A5E03648639 01 ...
Страница 188: ...Replacement parts FM 350 1 Counter module 188 Manual 05 2011 A5E03648639 01 ...
Страница 190: ...References FM 350 1 Counter module 190 Manual 05 2011 A5E03648639 01 ...
Страница 194: ...Glossary FM 350 1 Counter module 194 Manual 05 2011 A5E03648639 01 ...