Yaskawa E7 Drive User Manual - Manual (Page 214)

Communications D - 6
Error Check
Errors are detected during communication using CRC-16. Perform calculations using the following method:
1. The factory setting for CRC-16 communication is typically zero, but when using the Modbus system, set the factory set-
ting to one (e.g., set all 16 bits to 1).
2. Calculate CRC-16 using MSB as slave address LSB, and LSB as the MSB of the final data.
3. Calculate CRC-16 for response messages from the slaves and compare them to the CRC-16 in the response messages.
TM_E7_01_07182008.book Page 6 Wednesday, July 23, 2008 2:35 PM