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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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A watchdog timeout is triggered if no output channel write occurs for one or
more channels of a port within the time period specified. You can use the
watchdog Timer Control to specify Time from 0001H to FFFEH seconds (1
to 65534s). A time value of 0000H or FFFFH (0 or 65535) will disable the
timer for the port I/O. You can also define the state the outputs are to
assume following a timeout. For example, enter a state value of “0” to turn
OFF (open) all port outputs (failsafe state) upon watchdog timeout. You
would enter “1” to turn all port outputs ON upon watchdog timeout.
The Counter Configuration Page allows you to configure each of the eight
event counters. Select the counter channel at the top of the page and the
config
uration for that channel will be displayed below. After you’ve set up
the channel, scroll to the bottom of the page and click submit.
Input Counter (Default = OFF)
– Certain inputs may be used as event
counters for signals up to 150 Hz (channels 0-7). Excitation must be
connected and be 8V or above to function properly. Once a counter is
enabled, the output function is disabled until the counter is disabled.
Count Direction (Default = Up)
– Input signal pulses can be either counted
up (Default), or counted down from a pre-loaded value.
Count Edge Direction (Default = Negative)
– Input signal pulses can be
detected on either a rising edge or falling edge (Default).
Start-Up Count Mode (Default = Pre-Load)
– Input event counts can be
configured to be stored in non-volatile memory, allowing the event count on
a given input channel to be restored after a power-loss. Event counts can
also be enabled to start-up with its preload value after power-loss (Default).
Counter Debounce (Default = Disabled)
–
Event Counters are equipped
with a programmable debounce for noisy input signals such as electro-
mechanical relay contact bounce.
Counter Debounce Time -
Debounce Time can be set from 0 to 65535ms.
WEB BROWSER
I/O Test Page
Counter Configuration
Page
The input event counters must
cross the 4V threshold in order
to register a count.
Note: This page is not
available on the 989EN-4C16
model.
Note: In order for counters to
operate, proper excitation
must be provided.