SERIAL PORT PROTOCOL
The OSMAC Base Station transmitter supports three different serial port communication protocols.
The three protocols supported are:
TAP (also called IXO) The Telocator Access Protocol is the protocol for communications between central computer
devices and the base station. This is the protocol used by SitePro and TouchNet.
COMP1 This protocol is a simple way to send commands to one specific satellite. This protocol allows
the user to use a computer terminal to type the commands into the OSMAC Base Station. The
Base Station must be pre-configured with the satellite ID of the field satellite being controlled. All
data that is sent into the serial port of the Base Station will be transmitted to that one satellite.
COMP2 COMP2 is similar to COMP1 with the exception that each transmitted commands requires two
lines of text to be entered. The first line is the satellite address number being transmitted, and
the second line is the alpha or numeric command to send to that satellite.
TAP
The Telocator Alphanumeric Protocol, or TAP protocol as it is called, is used to send numeric command information to
the transmitter. It is the order and sequence of characters sent over the serial interface to the transmitter. The transmitter
must parse the commands and take the appropriate actions.
The following sections describe how the TAP protocol works. It assumes that the device communicating with the
OSMAC Base Station is directly connected via a serial cable. If other means are used (i.e. modem), then the modem
connection must first be established. For the purposes of this manual, the Base Station is assumed to be the transmitter,
and the device connected to its serial port is the “Entry Device”. Typical entry devices are computers, paging terminals,
and alarm monitors. Characters listed in brackets <XX> are ASCII codes and the values for them are listed in the ASCII
Control Character Table.
After initiating a command and receiving the “ID=” prompt, the Entry Device can respond in one of two different ways.
One way places the Base Station into an Automatic Mode, and the other places the base station into a Manual Mode.
Initiating a Command
8
Entry Device
<CR>
OSMAC Base Station Action
ID = <CR> <LF>
Comment
The entry device should send a <CR> at two second intervals
until the OSMAC Base Station responds with the characters
ID =. The <CR> is an ASCII code 13h.
The Base Station will respond within one second of the <CR>,
and it does not end the ID = prompt with a <CR> or a <LF>.
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