YASKAWA A1000 Series Technical Manual

C.7 Message Format
488 YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
The example in Table C. 3 shows the CRC-16 calculation of the slave address 02H and the function code 03H, yielding
the result 40D1H.
Note: This example does not show the calculation for a complete MEMOBUS/Modbus command. Normally data would follow in the
calculation.
Table C.3 CRC-16 Checksum Calculation Example
■ Response Data
To be sure that the data is valid, perform a CRC-16 calculation on the response message data as described above.
Compare the result to the CRC-16 checksum that was received within the response message. Both should match.
Description Calculation Overflow Description Calculation Overflow
Initial Value (FFFFH) 1111 1111 1111 1111 Function Code 03H 0000 0000 0000 0011
Address 02H 0000 0000 0000 0010 XOR w result 1000 0001 0011 1101
XOR w initial value 1111 1111 1111 1101 Shift 1 0100 0000 1001 1110 1
Shift 1 0111 1111 1111 1110 1 XOR w A001H 1010 0000 0000 0001
XOR w A001H 1010 0000 0000 0001 XOR result 1110 0000 1001 1111
XOR result 1101 1111 1111 1111 Shift 2 0111 0000 0100 1111 1
Shift 2 0110 1111 1111 1111 1 XOR w A001H 1010 0000 0000 0001
XOR w A001H 1010 0000 0000 0001 XOR result 1101 0000 0100 1110
XOR result 1100 1111 1111 1110 Shift 3 0110 1000 0010 0111 0
Shift 3 0110 0111 1111 1111 0 Shift 4 0011 0100 0001 0011 1
Shift 4 0011 0011 1111 1111 1 XOR w A001H 1010 0000 0000 0001
XOR w A001H 1010 0000 0000 0001 XOR result 1001 0100 0001 0010
XOR result 1001 0011 1111 1110 Shift 5 0100 1010 0000 1001 0
Shift 5 0100 1001 1111 1111 0 Shift 6 0010 0101 0000 0100 1
Shift 6 0010 0100 1111 1111 1 XOR w A001H 1010 0000 0000 0001
XOR w A001H 1010 0000 0000 0001 XOR result 1000 0101 0000 0101
XOR result 1000 0100 1111 1110 Shift 7 0100 0010 1000 0010 1
Shift 7 0100 0010 0111 1111 0 XOR w A001H 1010 0000 0000 0001
Shift 8 0010 0001 0011 1111 1 XOR result 1110 0010 1000 0011
XOR w A001H 1010 0000 0000 0001 Shift 8 0111 0001 0100 0001 1
XOR result 1000 0001 0011 1110 XOR w A001H 1010 0000 0000 0001
Perform operations with next data (function code)
XOR result 1101 0001 0100 0000
CRC-16
1101 0001 0100 0000
D140H
Continue from here with next data.

YASKAWA A1000 Series Specifications

General

Series	A1000
Type	AC Drive
Altitude	Up to 1000m without derating
Output Frequency	0-400 Hz
Control Method	V/f Control
Overload Capacity	150% for 60 seconds
Communication Options	Modbus, DeviceNet, Profibus, Ethernet/IP
Ambient Temperature	-10 to 50°C
Storage Temperature	-20 to 60°C
Humidity	5% to 95% (non-condensing)
Enclosure Rating	IP20
Horsepower	0.5 to 1000 HP
Power Range	0.4 - 630 kW (varies by voltage and model)
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overheat
Cooling Method	Fan Cooled
Safety	Safe Torque Off (STO)