81 ADAM-6200 User Manual
Chapter 4 System Configuration
1. Period Time Function:
The value of the input channel will be updated to the target devices with the defined
period.
2. Period Time Function + C.O.S (Change of Status) Function
The value of the input channel will still be updated to the target devices with the
defined period. Moreover, when C.O.S happens (the change of the analog input
value is greater than specific deviation or digital input status changes), the value of
the input channel will also update to the target
devices immediately.
Note! 1. There will be uncertainty for network communication. Sometimes
there might be packet lost when event occurs. This is the reason
we Period Time function +C.O.S. function (no C.O.S. function
only). When event occurs, even if the packet is lost, the data will be
sent again when the next period reaches. This can help to make
the system more reliable.
2. For preventing input noise also been send as digital input signal,
we suggest to activate DI filter function if C.O.S (Change of Status)
function enabled.
3. How to use Peer-to-Peer function to implement Event Trigger?
In many applications, the data will only be sent to a host computer
when specific event happens. Typical event is that the digital or
analog signal changes. To implement this kind of application,
ADAM-6200 modules enabled with Peer-to-Peer function is a per-
fect solution. The target device of Peer-to-Peer can be a computer,
simply by entering the IP of that computer into the Destination text
box of Peer-to-Peer/Event configuration tab in ADAM.NET Utility.
(The detail information about configuration is described below.)
Choose Basic mode and Period Time function + C.O.S. function as
communication method. There should be one program running on
the host computer to receive the data, and we provide an example
C program (VC++ 6.0) with ADAM-6200 module. Although the
ADAM-6200 modules will send data to the host computer periodi-
cally (the reason is for communication security, see Note below),
you can still distinguish the message is sent from Period Time func-
tion or C.O.S. function. The message contains which channel has
changed. So if you find there is no change for all channels in the
message information, then you can realize that there is no event
happening.
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