Alcorn Mcbride V+ series, User Manual

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16-5 Appendix B
– Alcorn McBride Serial Control Protocols
Ap
p
end
ice
s
B
Command Op-
code
Data Byte 1 Data Byte 2 Data Byte 3 Data Byte 4
DMXRamp
(257-512)
0x
5E
<DMX channel> <variable index,
for value to attain>
<ramp duration,
low byte>***
<ramp duration,
high byte>***
DMXRampSec
(1-256)
0x
5F
<DMX channel> <variable index,
for value to attain>
< variable index,
for ramp duration,
in seconds
N/A
DMXRampSec
(257-512)
0x
61
<DMX channel> <variable index,
for value to attain>
< variable index,
for ramp duration,
in seconds
N/A
* In Bytes (0x00-0xFF)
** In Frames (0x00-0xFF)
*** In Frames (0x0000-0xFFFF)
**** Byte takes the following form:
Bits Definition
7 and 6 Not Used
5, 4, and 3 Text Formatting Code:
000 – Send only significant characters (“7”)
001 – Send leading zeros (“007”)
010 – Send leading spaces (“ 7”)
011 – Send trailing spaces (“7 ”)
2, 1, and 0 Numerical Type Code:
000 – ASCII Decimal (“000” thru “255”)
001 – ASCII Hexadecimal (“00” thru “FF”)
010 – ASCII Octal (“000 thru “377”)
011 – Straight binary
Alcorn 9 Bit Control
Advantage:
Bullet-proof messaging
Disadvantage:
Difficult to program
Resources: C++ Programming Library available free to developers.
Alcorn 9 Bit Control uses Mark and Space parity bits to create a start of message
and end of message delimiter. When Mark parity is used, we say that the byte
has its ninth bit set. When Space parity is used, we say that the byte does not
have its ninth bit set.
Note
An asterisk (*) indicates that a byte has its ninth bit set (Mark Parity), and
two asterisks (**) indicate that a byte has both the eighth and ninth bits set.