RESEARCH CONCEPTS RC2000A DUAL AXIS Instructions Manual page 86

86 RC2000A Dual Axis Antenna Controller
Bytes 5-10
Bytes 11-16
byte 17
byte 18
If the data index or data value is invalid the NAK reply will be transmitted to the host. The normal reply
to this command will be the same as the reply to the device status poll command except that the
command code field will be '38h'.
CONFIG READ COMMAND
This command reads CONFIG mode data from the controller's non-volatile memory. The command
contains 7 bytes. Here is the format of the command.
Byte 0
Byte 1
Byte 2
bytes 3,4
Byte 5
Byte 6
If the command specifies an invalid index the reply to this command will be the NAK reply. If a valid
index is specified the reply will be as follows ...
Byte 0
Byte 1
Byte 2
Byte 3,4
Bytes 5-10
Bytes 11-16
Byte 17
Byte 18
SAT DATA WRITE COMMAND
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** The Pol CCW Limit value should be greater than or equal to
the Pol CW Limit value. Both limit values should be less than
1024. Note that the controller maintains a single checksum
value that validates both the Pol CCW and CW limits. Inputting
one of the pol limit values causes the checksum to be
recalculated using the value which was input and the other pol
limit value.
data field This field specifies the data value. In general, data values are
specified in an ASCII format. The data values are right justified
and left padded with blanks. Please refer to Chapter 4 –
CONFIG mode for the range of acceptable values for each
field. Data field formatting information unique to certain data
indices are described below. Byte 5 is the most significant digit
of the field.
reserved Set these bytes to blank characters, 20 hex.
ETX
checksum
STX
A where A is the address
39 hex command code
data index This field specifies the data that will be read from non-volatile
memory. The data index is specified in an ASCII format. The
data index is right justified and padded on the left with blanks.
See the Remote Config Write Command for a list of the data
indices. Byte 3 is the most significant digit of the index.
ETX
checksum
ACK
A The address of the RC2000 antenna controller.
39 hex The command code of the Config Read command.
data index The data index. See the Config Write command for a
description of the data indices.
data field The data value. See the Config Write command for a
description of the formatting applied to the data values. If the
data field contains '******' the data associated with the index is
invalid (an alarm should be active).
reserved These six bytes are reserved for future expansion. They are
currently set to blank characters (20 hex).
ETX
checksum
Appendix E Communications Protocol
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