what you are looking at is the parameter changes that can be made by system exclusive.
The messages in Hex you need to send are
F0 41 id 00 00 2F 12 a1 a2 a3 a4 data checksum F7
id is Device Id and Roland usually set this to 10 hex. So unless you have changed it that is what it will be.
A1 a2 a3 a4 is the 4 byte address for the parameter - these are the four numbers on the left of page 26
see page 4 for the heading of the table.
4 bytes of the Address - 4 bytes of the data (usually 1 byte) - Min and Max Data values
The BC can be programmed handle these messages but not from the front panel.
You will need either my editor, if you are a programmer, or Mark's graphic editor.
So in the temporary buffer the hex address of
Global EQ Low Gain = 00 00 00 48
Global EQ Mid Gain = 00 00 00 49
Global EQ Mid Q = 00 00 00 4A
Global EQ Mid Freq = 00 00 00 4B
Global EQ Low Gain = 00 00 00 4C
To program an encoder to change the Mid Freq.....
On Mark's editor go to the encoder edit dialog and select Custom Output
Press the + button to add a sysex line
Presss the + button on the new dialog to add the bytes and words
F0 41 10 00 00 2F 00 00 00 4B Value bits 0-6 Checksum:Method 1 starting 7 F7
you should get
$F0 $41 $10 $00 $00 $2F $00 $00 $00 $4B val0.6 cks-1 $07 $F7
Range is 00 to 1B (0 to 75)
I have a Hex - decimal converter on my website if you are unfamiliar with hex.
All the best
Royce