68
Using the PCR-A30 as a MIDI controller
Sys Ex. ASSIGN items
●
Specifying the checksum
The PCR-A30 can automatically calculate the checksum of a system exclusive message and embed
it in the message. In order to use this function, you must use the following procedure to specify the
starting location from which the checksum is calculated, and the location at which the checksum is
inserted. You can also select the type of checksum.
For an actual example, please read the Sys Ex.ASSIGN section
fig.css
1.
Press the
[CHECKSUM]
key before you input the byte at which checksum
calculation should begin.
The display will indicate “CSS” (Checksum Start).
If you press the
[CHECKSUM]
key once again, “CSS” (Checksum Start) will
be cancelled.
2.
Press the
[ENTER]
button.
3.
Continue inputting data.
fig.cs1
4.
Press the
[CHECKSUM]
key at the location where the checksum should be
inserted.
The display will indicate “CS1” (Checksum type 1).
5.
Press the
[ENTER]
button.
Checksum types
There are two types of checksum, as follows.
Switching the type
fig.cs12
If you want to switch to
type 2
,
press the
[2]
key after you press
[CHECKSUM]
in step 4. To switch
back to
type 1
, press the
[1]
key.
1
CHECKSUM
TYPE 1
This is the method used by Roland and most other
manufacturers
2
CHECKSUM
TYPE 2
Select this if the method other than type 1 is used
[2]
[CHECKSUM]
[1]
[CHECKSUM]
*1 Reference
*1 The -- area displays the currently set value. If it has not been set, the default setting will be displayed. Even if you change the type or mode
of the MIDI message that is assigned, the default setting will be displayed. This will be lit if the value is the same as the currently set value,
or will blink if the value is different.
PCR-A30_e2.book 68 ページ ２００３年１０月２２日 水曜日 午後３時１９分
