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9 Inside 800
9.4 Allowing for the special features of function blocks
320
Control Relay easy800
11/11 MN04902001Z-EN
www.eaton.com
Example: Do not wire backwards
The following circuit diagram shows an example of why you should not wire
backwards. In the third rung, the easy800 device finds a connection to the
second rung in which the first contact field is empty. The output relay is
therefore not switched.
Figure 209:Circuit diagram with five contacts, invalid
Figure 210:Circuit diagram with M 01 marker relay
9.4 Allowing for the special features of function blocks
How the
800 device evaluates the high-speed counters
CF, CH and CI
In order to evaluate the count pulses of up to 5 kHz, the high-speed counter
function blocks operate with an interrupt routine. The length of the circuit
diagram and the associated cycle time has no effect on the counter result.
Operating a DC or FT function block
→
Use one of the 96 auxiliary relays
M.., if you
have to connect more
than four contacts in series.
I 01----Q 04----
I
03--
o
z
---------------
k
h
-I 02----I 04-----------
Ä
Q 02
I 01----Q 04----
I
03----I 05---
Ä
M 01
I 02----I 04----M 01-----------
Ä
Q 02
→
The following has to be taken into account when operating a
PID controller (DC) or a signal smoothing filter (FT):
The cycle time of the program must be less than the scan time
of these function blocks. If the cycle time is greater than the
scan time, these function blocks cannot supply any constant
results.
Содержание easy800
Страница 1: ...11 11 MN04902001Z EN replaces AWB2528 1423GB Manual Control Relay 800 4 patpks nycmyn...
Страница 4: ...2...
Страница 16: ...0 About This Manual 0 5 Writing conventions 12 Control Relay easy800 11 11 MN04902001Z EN www eaton com...
Страница 138: ...4 Wiring with 800 4 7 Working with function blocks 134 Control Relay easy800 11 11 MN04902001Z EN www eaton com...
Страница 300: ...7 SmartWire DT 7 4 Errors on the SWD line 296 Control Relay easy800 11 11 MN04902001Z EN www eaton com...
Страница 336: ...10 Diagnostics possibilities 10 4 Transistor output 332 Control Relay easy800 11 11 MN04902001Z EN www eaton com...