
ZENO
®
-3200 USER MANUAL
Coastal Environmental Systems (206) 682-6048
Page 114
With the above communications settings, any regular ZENO
®
-3200 Data Output messages routed to
COM2 will be sent to the ARGOS radio. The ARGOS radio will be buffered up, and transmit over the
self-timed transmit channel when the next self-timed transmission interval occurs.
ARGOS MESSAGES ARE LIMITED TO 32 BYTES.
6.8.6. ARGOS Binary Format
The ARGOS binary format packs data into an efficient format, suitable for transmission over an ARGOS
satellite. To define a message in ARGOS Binary Format, each field of that message must be a field of
type ARGOS Binary Format (rather than Log Only, Time Stamp, etc.) Use the Data Output Menu to
define each field in your message, and to choose the ARGOS Binary Format type.
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Fields of this type
are transmitted, but not logged.
The ARGOS Binary Format converts each data value into an integer, encodes it as a 1-, 2-, 3- or 4-byte
binary value.
The following line items in the Data Output Menu are interpreted in a non-standard way for the ARGOS
Binary Format.
Field decimal places: The data value to be treated is multiplied by the appropriate number of factors
of 10 to bring the data value to an integer, while still retaining the requested accuracy. for example,
suppose you wish to output a measured temperature to 2 decimal places (e.g., 23.62 degrees). Line
item 5 should take the value 2. The value will be converted to 2362 before transmission.
Field width: Suppose that the field width is 3. The data value (2362) will be converted to a 3x8=24-
bit value, with the most significant bit being a sign bit. The binary version of this data value
becomes:
00000000 00001001 00111010
The three 6-bit data fields would be transmitted as follows:
Unless the data sent to ARGOS is ASCII, it will not be viewable on a standard terminal. In
hexadecimal binary, the three values will appear as follows:
<00><09><3A>
6.9. PASSTHROUGH MODES
Passthrough mode allows you to talk directly through one COM port on the
ZENO
®
-3200 to a device connected to a different COM port on the ZENO
®
-
3200.
Examples of using passthrough mode are having direct communication with a serial sensor connected to
the ZENO
®
-3200, or testing communications over a two-way radio.
There are two types of passthrough mode available:
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Refer to Section 10.6.
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