4 Functions of the count inputs (CNT1 and CNT2)
4.2 Additional functions of the count inputs
XI/ON: XNE-2CNT-2PWM
04/2011 MN05002035Z-EN
www.eaton.com
55
Period duration measurement
It might be suitable to choose the period duration measurement for signal changes with lower
frequencies.
Enabling the period duration measurement
The period duration measurement is activated, if:
CNTx_FQPD = 1
(
→
see Parameter data of the module, byte 0, bit2, page 25).
The period duration measurement is done in the following basic measurement modes:
• Calculation of the period duration measurement in
μ
s
:
• Calculation of the period duration measurement in
ms
:
Restrictions
The following settings are
not
allowed:
REG_CNTx_MUL = 0
REG_CNTx_DIV = 0
REG_CNTx_INTTIME = 0
Input registers
Value
1
1
Output registers
period duration measurement in
μ
s
Input registers
Value
1
1000
Output registers
period duration measurement in
ms
Note
The accuracy of the measurement increases with the length of the integration time.
It should be noted, that the measured value (REG_CNTx_MV) is only updated after
the integration time has expired.
Содержание XNE-2CNT-2PWM
Страница 1: ...04 2011 MN05002035Z EN User Manual XI ON XNE 2CNT 2PWM Technology Module...
Страница 10: ...1 About this manual 1 3 Overview 10 XI ON XNE 2CNT 2PWM 04 2011 MN05002035Z EN www eaton com...
Страница 84: ...7 Report of configuration errors 7 1 Error register 84 XI ON XNE 2CNT 2PWM 04 2011 MN05002035Z EN www eaton com...