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ICCIIV.2
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1990-09-02
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ICCIIV.2 - 2 -
model CT-17 level converter for RS232.
The interface uses a "carrier-sense, multiple-access
with collision detection" local area network protocol, so
that multiple rigs can be connected in parallel without dif-
ficulty. Thus, you can use the same RS232 line and level-
converter interface to control many rigs. Each rig must
have a unique address, which is set by internal jumpers.
Each model comes factory preset to its own address, which is
04 for the 735 and 08 for the R7000. Appendix 2 has infor-
mation on the jumper settings.
I will use the words "receive" and "send" to refer to
data transmissionhe word "rig" to mean an ICOM product using the
CI-V interface.
The rigs send and receive data in variable length pack-
ets, which are formatted as follows:
Byte # Contents
1 hex 'FE' (i.e. 11111110 binary, 254 decimal)
2 hex 'FE'
3 <RX>
4 <TX>
5 <Code>
6-n <BCD data of variable length>
n+1 hex 'FD'
CONTINUED IN FILE ICCIIV.9