Spectrum Controls 1769sc-HART Modules - Manual (Page 146)

Compact IO™ Isolated HART Analog Input Module
User's Manual 0300215-03 Rev. A
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8.2.5 DEST_CHECKSUM Routine
This routine calculates the checksum for a message received from the module one page at
a time. This routine is called from the MSG_TO_MOD routine.
Figure 8-9a (Destination Checksum)