Omron CS1W-CT021, Руководство по эксплуатации

Страница: 27 / 201

34#$(1($%'()*+-%*.-05%"%$'#"(+'($+
Section 1-3
$%
Note As a general guideline it can be stated that if you want the timing requirements for
the Counter Inputs to satisfy the above mentioned specifications, you must pay
attention to the type of output driver of the encoder being used, the length of the
encoder cable and the frequency of the count pulses generated. For example, if
you use an E6B2-type Open Collector encoder (e.g. E6B2-CWZ6C) at 24 V with
10 m cable, you can typically generate count pulses up to 20 kHz. Therefore, if you
B
0V
Off
On
F
GG
0V
Off
On
Phase A
0V
Off
On
H
Counter Inputs A, B and Z
RS-422 Line Driver signals signals
uts A and B
duty factor of 50%
phases with phase
uts
Relationship between A and B phases with phase
differential inputs
Counter inputs A and B
Input pulses with a duty factor of 50%
C
A A
B B
50%
Off
On
E
Z
50%
Off
On
Counter inputs A and B
Input pulses with a duty factor of 50%
Relationship between A and B phases with phase
differential inputs
Counter Input Z * / Digital Inputs (24V)
D D D D
Phase A
Phase B
Off
50%
On
Counter inputs A and B
Input pulses with a duty factor of 50%
Relationship between A and B phases with phase
differential inputs
Counter Input Z *
0V
Off
On
F
G G
0V
Off
On
Z
J
0V
Off
On
Phase A
Phase B
0V
Off
On
I I I
I
H
5/12/24V input signals RS-422 Line Driver signals
Counter Inputs A, B, Z and Digital Inputs
* Maximum allowed frequency of Z-pulses is 1 kHz * Maximum allowed frequency of Z-pulses is 1 kHz
J I H G F E D C B A
>10
>23
>100 >50 >100 >10 >23
>100
>50 <3
>10 >4.5 >20 >10 >20 >10 >4.5 >20 >10 <3
>10 >1
>4
>1 >2
Timing requirement [µs] Filter
Selection
10 kHz
50 kHz
500 kHz <3
>2
>4 >1 >10
W902-E2-03.book Seite 12 Donnerstag, 7. Oktober 2004 2:06 14