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4 Wiring with
4.6 High-speed counters, -DA, -DC
104
Operating instructions
05/10 MN05013003Z-EN
www.eaton.com
4.6.2.1 Counter frequency and pulse shape
The maximum counter frequency is 1 kHz.
The signals must be square waves. We recommend a mark-to-space ratio of
1:1.
If this is not the case:
The minimum mark-to-space ratio is 0.5 ms.
t
min
= minimum time of the pulse or pause duration
f
max
= maximum count frequency (1 kHz)
4.6.2.2 Wiring of a high-speed counter
The following assignment of the digital inputs apply.
•
I1: high-speed counter input for counter C13.
•
I2: high-speed counter input for counter C14.
You integrate a high-speed counter into your circuit in the form of a contact and
coil.
.
The coils and contacts have the following meanings:
t
min
= 0.5 x
1
f
max
→
High-speed counters operate independently of the program
cycle time. The result of the actual value setpoint comparison is
only transferred once every program cycle for processing in the
circuit diagram.
The reaction time in relation to the setpoint/actual value
comparison can therefore be up to one cycle in length.
→
If you use C13 or C14 as high-speed counters you must enable
them with the coil CC13 or CC14 accordingly.
----------CC13
C13-------SN3
I6--------DC13
I8-C13----RC13
Contact
Coil
C13
-
C14
The contact switches if the actual value is greater than or equal to the setpoint.
CC13
,
CC14
Enable of the high-speed counter on 1 signal coil activated
DC13
,
DC14
Counting direction
• Status 0, not activated, up counting.
• Status 1, activated, down counting.
RC13
,
RC14
Reset, coil triggered: actual value reset to 00000
→
The high-speed counter can also be enabled specifically for a
special operating state. This has the advantage that the cycle
time of the device is only burdened with the counting when it is
taking place. If the high-speed counter is not enabled, the cycle
time of the device is shorter.
Содержание easy500, easy700
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