Polled COM Ports are essentially the same as normal COM Ports with the exception that they send out a text prompt at regular intervals to 'poll' sensors reading and writing from the port. The data from the sensor is only output when a specific command is transmitted from SCS to the sensor. The message is either terminated by a special character or is defined at a fixed length.
Polled COM is a special implementation of the standard COM interface, therefore the majority of the settings and concepts are the same. However it does have a single additional property on the Basic tab:
Message Definitions under a Polled COM Interface also require a Command Prompt (the prompt ACQ will send out the COM port at the specified polling rate) and a Queue Order (the order which ACQ will serially send the various prompts, assuming there is more than 1 definition).
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