Appendix D
Example 2
This example explains how to calculate the checksum value of a Read High alarm limit command string:
Case 1. (If the Checksum feature is disabled) Command:$07S1RH(cr)
Response: !07+2.0500(cr) when the command is valid. Case 2. (If the Checksum feature is enabled) Command:$07S1RHA9(cr)
Response: !07+2.0500D8(cr) where:
A9 represents the checksum of this command, and<R>D8 represents the checksum of the response.
The checksum of the command string is derived as shown below: A9h = (24h+ 30h + 37h + 53h + 31h + 52h + 48h) MOD 100h
The hexadecimal ASCII codes for $, 0, 7, S, 1, R and H are 24h, 30h, 37h, 53h, 31h, 52h and 48h respectively. The sum of these ASCII codes is 1A9h. The
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