Compact FLASH Digital Audio System
6
The Hex numbering system has a base of 16 as compared to the decimal system which has a base of
ten. A Hex numeric digit is 0 through F, 0 being equal to decimal 0, and F being equal to 15. The first digit
(MSB) of the two digit hex number is multiplied by 16. The second digit (LSB) is added to the adjusted
value derived from the first digit. The number 10 in Hex is thus equal to 16 decimal. The number 20 Hex
is 32 decimal, 21 Hex is 33 decimal, and 7F Hex is 127 decimal. For your convenience, a decimal to hex
conversion table is provided below:
LSB
→
→→
→
MSB
↓
↓↓
↓
0 1 2 3 4 5 6 7 8 9 A B C D E F
0
0123456789101112131415
1
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
2
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47
3
48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63
4
64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79
5
80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
6
96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111
7
112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127
For example, a sound file associated with input #1 would be named “01.WAV,” a sound file for input
#10 would be named “0A.WAV,” a file for input #16 would be “10.WAV” and a file for input #36 would
be “24.WAV”. There is no input #0 and so “00.WAV” is reserved and should not be used.
The two digit hex input number must be the first two characters in the filename.
Additional letter tokens are appended to the input # in the filename to determine when and how the audio
sound is played. The Compact FLASH Digital Audio System provides eight inputs in its standard con-
figuration and, by adding an optional board, can be expanded to either 16 or 32 total inputs. The inputs can
be wired to switches or other such devices, either normally opened or normally closed.
You can also connect the RS-232 port of the Compact FLASH Digital Audio System to the RS-232 port
of your computer or PLC to control up to 127 sound commands.
The filename letter tokens are described as follows:
If a “C” appears after the hex number in the filename, the sound file will be played on a closure of the
corresponding input or serial command. The sound will start playing when an input goes from an open to
closed state.
If a “O” appears after the hex number in the filename, the file is played on a opening of the
corresponding input or serial command. The sound will start when an input goes from a closed to an open
state
If a “P” after the hex number in the filename, the file will play only while the “C”or“O” state is true.
If “C,” it will play while the input is closed and it will stop playing the sound when the input is opened. If
“O,” it will play while the input is open and it will stop playing the sound when the input is closed.
If an “R” appears in the filename, the sound is repeated, that is to say that the same sound file plays
over and over. If used in conjunction with the “P” command, the sound file will repeat the entire time the
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