ADLINK ND-6021 - Manual (Page 25)

Command Set • 19
2- character
< >
Identifies a control code character, such as for
carriage return, its value is 0x0D. 1- character
Format of NuDAM Commands
(Leading Code)(Addr)(Command)[Data][Checksum]
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
Response : !01400600
$ : LeadingCode
01 : Address
2 : Command (Read Configuration)
: Carriage return 0x0D
Example 2: checksum is enable
User Command : $012B7
Response : !01400600AC
$ : LeadingCode
01 : Address
2 : Command (Read Configuration)
B7 : Checksum value
: Carriage return 0x0D
‘$’ = 0x24 ‘0’ = 0x30 ‘1’ = 0x31 ‘2’ = 0x32