Roland TR-727 - Page 51

3. 1. e
End
of !il6
By
le
(EOF)
Descr ip t Ion
a
nil
0000
b
0100
0001
c
0101
0101
d 1111
0111
Exclusive
status
Roland ID
n
Operation code
End of System Exclusi\
3.1.7
Communication
error
Byte
a
nil
0000
b
0100
0001
c
0111
0001
d 1111
0111
3. 1.
8
Rejection
Byte
i
nil
OOOD
b 0100
0001
c
0111
0000
d nil
0111
CERR)
Descr ip
t
ion
£xc lus
ive
s ta tus
Roland ID
«
Operation code
End
of System
Exclusive
(RJC)
Descr
ip
t ion
Exc lus
ive
s ta tus
Roland ID H
Operation code
End of
System
Exclusiv
3.2
Sequence of
communication
3.2.1
When
the RQF is recognized
RQF
Reques a F le
Crecoived)
DAT
Data
Ctransmitted)
CNT
Contini
le
(transmitted)
PAS
Acknow edge
(14
times)
(received)
DAT
Data
Ctransmitted)
EOF
End of
File
(transmitted)
PAS
Acknow edge
(received)
3.2.2 When
the
WSF is recognized
WSF
Want to Send a file (rece
i
ved)
RQF
Request
a
File (transmitted)
DAT
Data
(received)
CNT
Continue
(received)
PAS
Acknowledge (transmi tted)
:
(U times)
DAT
Data
(received)
EOF
End of file
(received)
PAS
Acknowledge Ctransmi tted)
3.2.3
When the
WSF Is
received with error.
a
WSF
:
Want to Send
a
file (received)
b RJC
:
Rejection Ctransmitted)
(The
sequence will abort then return
to
normal operation.)
3. 2.
4 When the
RQF is re 8d
wi
th error.
a RQF
:
Request a file (received)
b RJC
:
Rejection (transmitted)
(The sequence will
abort then return to
normal operation.)
3.2.5
When the ERR
is recognized.
DAT
CNT
ERR
DAT
CNT
Data
Continue
Communication err
Data
(same
block)
Continue
tie
rs
is rece ived w
(transmitted)
(transmitted)
or
(received)
(transmitted)
(transmitted)
1th errors.
DAT :
Data
(received)
ERR
:
Communication error
(transmitted)
The unit will
expect to
receive
the
previous DAT.