Omega A2400 - Manual (Page 42)

SetUp Command 5-3
to communicate with a module with an unknown address is with the Default
Mode.
The most significant bit of byte 1 (bit 7) must be set to ‘0’. In addition, there
are six ASCII codes that are illegal for use as an address. These codes are
$00, $0D, $24, $23, $7B, $7D which are ASCII codes for the characters
NUL, CR, $, #, {, and }. Using these codes for an address will cause an
ADDRESS ERROR and the setup data will remain unchanged. This leaves
a total of 122 possible addresses that can be loaded with the SU command.
It is highly recommended that only ASCII codes for printable characters be
used ($21 to $7E) which greatly simplifies system debugging with a dumb
terminal. Refer to Appendix A for a list of ASCII codes. Table 5.1 lists the
printable ASCII codes that may be used as addresses.
Table 5.1 Byte 1 ASCII Printable Characters.
HEX
ASCII HEX ASCII HEX ASCII HEX ASCII
21 ! 3A : 51 Q 68 h
22 “ 3B ; 52 R 69 i
25 % 3C < 53 S 6A j
26 & 3D = 54 T 6B k
27 ‘ 3E > 55 U 6C l
28 ( 3F ? 56 V 6D m
29 ) 40 @ 57 W 6E n
2A * 41 A 58 X 6F o
2B + 42 B 59 Y 70 p
2C , 43 C 5A Z 71 q
2D - 44 D 5B [ 72 r
2E . 45 E 5C \ 73 s
2F / 46 F 5D ] 74 t
30 0 47 G 5E ^ 75 u
31 1 48 H 5F _ 76 v
32 2 49 I 60 ‘ 77 w
33 3 4A J 61 a 78 x
34 4 4B K 62 b 79 y
35 5 4C L 63 c 7A z
36 6 4D M 64 d 7C |
37 7 4E N 65 e 7E ~
38 8 4F O 66 f
39 9 50 P 67 g