Message Structure - Kenwood PWR 18-2 Instruction Manual

Address Setting Ranges
The M A S T E R unit and S L A V E unit machine addresses can be
set to numbers from " 0 " to " 2 6 " w h i c h , in the message ad-
dresses, correspond to the " @ " character or to a letter from
" A " to "Z", a s s h o w n in the following table.
Machine Machine address
MASTER unit
S L A V E unit
S A L V E unit
One M A S T E R unit can be used to control up to four
S L A V E units. However, if more than five S L A V E units
are used together, the
In information messages sent from the M A S T E R unit to S L A V E
units, designate the S L A V E units using the message addresses.
Message address
0
@
A
1
Z
26
s y s t e m may not operate.

9. MESSAGE STRUCTURE

CONTROL (LISTEN Function)
M A S T E R end:
ENQ destination address, command E T X B C C 1 B C C 2
S L A V E end:
A C K self-address or NAK self-address
MONITORING (TALK Function)
M A S T E R end:
ENQ destination address command E T X B C C 1 B C C 2
S L A V E end:
A C K self-address or N A K self-address
ENQ destination address message E T X B C C 1 B C C 2
Controller end:
A C K self-address or NAK self-address
SERVICE REQUESTS
Can be generated at the S L A V E end only w h e n the controller
is allowing service requests.
S L A V E end:
ENQ distination address message E T X B C C 1 B C C 2
M A S T E R end:
A C K self-address or NAK self-address
19