5-6
Configuring a Scanner to Communicate with the Encoder
Figure 5.4
Edit I/O Parameters Dialog Box - COS
9.
Select the type(s) of data exchange (Polled, Change of State,
and/or Cyclic). In our example, we selected Change of State.
10.
Type the number of bytes that will be required for your I/O in the
Rx Size and Tx Size. See
data sizes.
11.
Set the scan rate:
Click
Help
for more information.
12.
When using COS in high speed and/or high resolution
applications, it may be necessary to limit how often the device
will report to the master in order to lessen network traffic. To do
so requires either setting the hysteresis to over 10% of the
‘RESOLUTION PER REVOLUTION’ value or increasing the
‘Inhibit Time’. To increase the inhibit time to 10ms, click on the
Advanced...
button under ‘Change of State/Cyclic.’ Adjust the
Inhibit Time and click
OK
.
Data
Exchange
Rate to set
Polled
Polled Rate
Change of
State
Heartbeat
Rate
Cyclic
Send Rate
Summary of Contents for Allen-Bradley 842D
Page 10: ...P 6 Using this Manual Notes...
Page 18: ...3 4 Configuring the DeviceNet Encoder DIP Switches Notes...
Page 56: ...I 4 Index Notes...
