Manual

32 • Command Set
Format of NuDAM Commands
(Leading Code)(Addr)(Command)[Data][Checksum]<CR>
When checksum is enable then [Checksum] is needed, it is
2-character. Both command and response must append the checksum
characters.
How to calculate checksum value ?
[Checksum] =
((LeadingCode)+(Addr)+(Command)+[Data]) MOD
0x100
Example 1: checksum is disable
User Command: $012<CR>
Response: !01400600<CR>
$
: LeadingCode
01
: Address
2
: Command (Read Configuration)
<CR>
: Carriage return 0x0D
Example 2: checksum is enable
User Command:
$012B7<CR>
Response:
!01400600AC<CR>
$
: LeadingCode
01
: Address
2
: Command (Read Configuration)
B7
: Checksum value
<CR>
: Carriage return 0x0D
‘$’ = 0x24 ‘0’ = 0x30 ‘1’ = 0x31 ‘2’ = 0x32
B7 = ( 0x24 + 0x30 + 0x31 + 0x32 ) MOD 0x100
‘!’ = 0x24 ‘0’ = 0x30 ‘1’ = 0x31 ‘4’ = 0x34
‘6’ = 0x36
AC = ( 0x24 + 0x30 + 0x31 + 0x34 + 0x30 + 0x30 + 0x36 + 0x30
+ 0x30 ) MOD 0x100