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# Rejection ; RJC
(4FH)
'This message is sent out when there is a need to terminate
cammunicalian
by
overriding
(he
current
message.
An
RIC
message
will be Lriggercd
when :
a WSD or RQD message has specified an ilega! dala address
or
size, or
the device
is mot
ready
for communication.
an
iticgal
number
of addresses
or
data
has
been
detected.
dala
lransfer
has
been
terminated
by
an
operator.
a communicatinns
error
has
occurred.
An
ERR
message
may
be
sent
oul
by a device
on
cither side
of
the
interface.
Communication
must
be
terminated
immediately
when
cither
sive
triggers
an
ERR
message,
Byte
Description
FOH
Exclusive status
ath
Manufactures ID (Roland)
DEV
Device
ID
MDL
Model iD
4FH
Command iD
FTH
End of exclusive
# Example
of Message
Transactions
@Data
transter from device (A)
to device (B).
A}
[Acknowledge]
{Want to send data} ————————_+
<—_—--—————_
[Acknowledge]
[End of data}
i
—t—_—____————_
[Acknowledge}
@ Device (A) requests and receives data from device (6).
{Request
data}
——————_———
e (B)
<<.
[Data set}
[Acknowiedge]_§_
———————_—_
$<
[Data
set)
{Acknowledge}
————__——_»>
[End
of data}
[Acknowledge}
————_—
@Error occurs while device (A) is receiving data from
device (B).
1) Data transfer
from device (A) to device (B).
Device (A)
Device (8)
<¢—___--—
[Dara set]
[Acknowiedge)
a
(Error) x
(Data
set}
(Communication error]. —————_—_»~
~~
[Data set}
(the same data
[Acknowledge]
—————_—
as: above)
2) Device (B)
rejects the data re—transmitied, and
completes data transfer,
[Bence 5]
.
<——--—__—_—_——-_
[Data set)
(Complete) [Rejection]
3) Device (A) immediately completes data transter.
—_—————-—
(Data set)
{Acknowiedge}
©
(Error) x
—_—————————
(Data set)
[Rejection}
-_
(Complete)
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