Lenze EPM-T1 Series - 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
Data Out
E.0...E.7
E.0...E.7
Data Out
E.8...E.15
E.8...E.15
Data Out
Data Out
Data In
Data Out
Data Out
Data Out
Data Out
Data In
Data In
Data In
Data In
Data In
Data In
Control
Data 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