Roland PCR-30, PCR-50, PCR-80 Sys Ex. ASSIGN items, Checksum types, Switching the type

Convenient functions

Sys Ex. ASSIGN items

■Specifying the checksum

The PCR-30/50/80 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 “Bend Pitch Control” (p. 144)

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.

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.

1	CHECKSUM	This is the method used by Roland and most other
	TYPE 1	manufacturers

CHECKSUM

2 Select this if the method other than type 1 is used

TYPE 2

Switching the type

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]

[2] [1]

[CHECKSUM]

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