Roland S-330 Owner's Manual page 155

#
Rejection
:
RJC (4FH)
This
message
is
sent oul
when
(here
is
a
need
Co
terminate
communication
by overriding
the current message.
An RJC
message
will be IrigRcrcd
when
:
•
a
WSD
or
KQI) message has
specified
an
illegal
data address
or
size,
•
the device
is
not ready
for
communication.
•
an
illegal
number
of addresses or data has
been
detected.
•
data transfer
has been terminated by an
operator.
•
a
communications
error
has occurred.
An KRR message may
be sent out
by a device on either side
of the interface
.
Communication
must
be terminated
immediately
when
cither side triggers an
ERR
message.
Byte Description
FOH
Exclusive status
41
Manufacturer ID
(Roland)
DEV
Device
ID
MDL
Model
ID
4FH
Command
ID
F7H End
of exclusive
#
Example
of
Message Transactions
•
Error
occurs
while
device (A)
is
receiving
data from
device (B).
1)
Data transfer
from device (A)
to
device
(B).
|
Device (A)|
|
Device (B)]
[Data set]
[Acknowledge]
(Error)
x
-*-
[Communication
error]
[Data
set]
[Acknowledge]
-
[Data
set]
(the
same
data
as
above)
2)
Device
(8)
rejects
the data re-transmitied,
and
quits
data transfer.
|
Device (A)]
[Acknowledge]
(Error)
x
-*—
[Communication error]
(Quit)
-*—
|
Device (B)
|
[Data set]
[Data set]
[Rejection]
•
Data
transfer from device (A) to device (B).
|
Device (B){
3) Device (A) immediately quits
data
transfer.
I
Device (A)
J
[Want
to
send
data]
[Data set]
[Data
set]
[End of
data]
[Acknowledge]
[Acknowledge]
[Acknowledge]
[Acknowledge]
|
Device (A)|
[Acknowledge]
(Error)
x
[Rejection]
|
Device (B)|
[Data
set]
[Data set]
(Quit)
•
Device (A) requests
and receives
data from device
(B).
|
Device (B)|
|
Device (A)|
[Request data]
[Acknowledge]
[Acknowledge]
[Acknowledge]
[Data
set]
[Data
set]
[End of data]