Sierra Video 507125 - Manual (Page 11)

Sierra Video Systems SmartLinx Bus Adapter busadap.doc
11
7.2 Poller Messages
When the Bus Adapter is poller-enabled with the appropriate DIP switch, it acts as the SmartLinx poller device.
The poller device responds to messages sent to the special poller address of 0xF7. The messages supported at this
address are separate from the ones described above for the basic Bus Adapter. It is as if the Bus Adapter were two
devices in one, except the poller does not respond to the important “T” message or send the “t” message.
The poller’s user module name cannot be changed with the “N” message. It is fixed as “Poller”.
Table 5 lists the universal SmartLinx messages that a Bus Adapter module understands and processes at the
poller address (0xF7) when it is poller-enabled. For a full description of these messages, refer to the document
SmartLinx Protocol Description. The byte of all universal messages is equal to the CmdChar character code
(in ASCII) plus hex 80. Universal messages other than those shown here are ignored, so if the universal message set
is ever extended, older modules can be assumed to ignore newer messages.