B-16 Computer Control
SPECIAL POWERWAVE COMMUNICATIONS PROTOCOLS
After any initial command character is sent to the reader, the host should wait for an
<ACK> response before sending the remaining information associated with the
command. If a <NAK> response is received, it means the reader does not recognize
the character as corresponding to a valid command.
NOTE: All ASCII numeric representations send high digit first.
INSTRUMENT IDENTIFICATION
When a single '}' character is sent to the spectral reader, a PowerWave 200 will
respond with a single ‘0’. A PowerWave 340 will response with a single ‘1’. All other
instruments will return <NAK>.
STRIP READS
The Select Strips (‘%’) command is defined as follows:
Host Limits Response
first strip (1) 0 - 12: first strip to read
last strip (1) 0 - 12: last strip to read
Example:
0x09, 0x0C means read strips 9 through 12
The Select Strips command returns the standard status response string.
To read a range of one or more contiguous strips, first send a reader definition table
(‘V’ command - standard or modified for multi-wavelength as described below).
Then send the Select Strips command. Once this command has been used to select a
strip range, it shall remain in effect for all subsequent reads until a new reader
definition table is sent to the reader (‘V’ command), or a new Select Strips command
is sent.
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