CN8240 & CN8260 Series Communications & Options
Digital
Communications Option
Examples of valid numeric representations for a 6 character data field:
Numeric Value | ASCII Representation |
3 | 3.0000 |
| 000003 |
| 003.00 |
100 | 100.00 |
| 0100.0 |
| 000100 |
3.2 | 003.20 |
| 0003.2 |
Examples of invalid numeric representations for 6 character data field:
(B represents a blank, or a space, character)
Numeric Value | Bad ASCII Representation | Why? |
|
|
|
3 | BBBBB3 | Leading blanks |
|
| are not allowed. |
| 3.0BBBB | Trailing blanks |
|
| are not allowed. |
3.2 |
CHKSUM
This is a two character Message Code Numbering System, representing the sum of all the ASCII values of all the characters (excluding the START, CHAR, the END CHAR, and the CHKSM themselves) in the message. The sum is computed using the following formula:
CHKSM = SUM(All Message Characters)%256 % represents the modulus operator.
END CHAR
This is a single character designating the end of the message. For all messages, the character used is <CR>, the carriage return.
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