Lenze EPM−T9XX Modular system - Manual (Page 505)

Parameterising 1xcounter/16xdigital input module
Measuring the frequency (mode 3)
13
Parameter setting via PROFIBUS−DP
13.4
13.4.6
L
13.4−11 EDSPM−TXXX−9.0−11/2009
f + f
ref
@ m
n
f Frequency of signal A
f
ref
Reference frequency
m Count value
n Starting value
Example: Reference frequency f
ref
= 1 MHz, starting value n = 1,000,000, count
value m = 10,000
f + 1 MHz @ 10000
1000000
+ 10 kHz
Act. value
counter
Start value counter
Data to module
Data from module
Dat
a
Out
E.0...E.7 E.0...E.7
Dat
a
Out
E.8...E.15 E.8...E.15
Dat
a
Out
Dat
a
Out
Dat
a
In
Dat
a
Out
Dat
a
Out
Dat
a
Out
Dat
a
Out
Dat
a
In
Dat
a
In
Dat
a
In
Dat
a
In
Dat
a
In
Dat
a
In
Control Dat
a
In
Ref.
Freq.
0
0
0
0
A
Start=1 dec
Load=4 dec
Stop=2 dec
Clear=8 dec
1
1
1
1
2
2
2
2
3
3
3
3
4
4 4
5
5 5
:
E.0
E.1
E.2
E.15
epm−t256
Fig. 13.4−11 Counter access of 1xcounter/16xdigital input in the mode 3
epm−t185
Fig. 13.4−12 Signal characteristic of 1xcounter/16xdigital input in the mode 3
Frequency calculation
Counter access
Signal characteristic