BusWorks® Model 989EN U
ser’s Manual Modbus TCP/IP Digital I/O & Counters
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Acromag, Inc. Tel:248-295-0880 Fax:248-624-9234 Email:
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Counter Pre-Load Value
– Each channel can be pre-loaded with a start
value for the counter from 0
– 4,294,967,295.
Counter Alarm Enable (Default = Disabled)
–
Event counters are
equipped with alarms that can toggle the alarm output state upon reaching
the termination value of 0 or 4,294,967,295.
Count Termination Mode
–
The outputs can be programmed to either reset
the alarm after next count (auto-rollover default), or hold the alarm state until
a reset is issued (latched).
Note:
Once the counter has rolled-over, it will return to the pre-load value.
Group Timer Limit
–
This control is used to set the maximum time for the
pulse timer. This value can be set from 0 to 65535ms. For further
explanation of the Pulse Timer, please see the Counter Test Page section.
Timer Limit State
–
This control sets the state value of the timer after the
Timer Limit has been reached. This value can be set from 0 to 65535.
Start Counter Button
–
This button will allow counting on the selected
enabled counter.
Note: When counters are first enabled, counters are
automatically started.
Stop Counter Button
–
This button will stop the counting on the selected
enabled counter. To restart the counters, click on the Start button.
Reset Counter Button
–
This button resets the selected counter.
Counter Configuration Examples:
IMPORTANT:
Counters MUST be reset to reload the Pre-Load Value.
Problem:
Configure channel 4 to be an up counter, trigger on a rising edge,
with last count restore.
Solution:
Web Interface:
1.
Select the Channel 4 button at the top of the page.
2.
In the Counter Configuration Page, locate the Counter Enable
option and select “Enabled”.
3.
For the Count Direction option, select
“Up”.
4.
For the Edge Detection option
, select “Positive”.
5.
For the Start-up Mode option
, select “Last Count”.
6.
Click on the “Submit” button at the bottom.
Modbus:
1.
To enable Counter 4, write 0010H to register 40010.
2.
To configure the counter for “Up Counting”, write 0000H to
register 40013.
3.
To configure the counter for “Positive” edge counts, write
0010H to register 40012.
4.
To configure the
counter for “Last Count” restore, write 0000H
to register 40011.
WEB BROWSER
Counter Configuration
Page
Note: After a counter is
enabled, the output for that
channel is automatically
disabled.
Note: Debounce time applies
to all enabled channels.
Note: This page is not
available on the 989EN-4C16
model.
Note: Input signals must be
stable longer than the
debounce time to avoid
missing counts.
