Yaskawa DeviceNet Option Card CM059 - Manual (Page 56)

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Drive Parameters Object Class 100 (64 Hex):
This DeviceNet Object Class can read and write all of the same parameters and monitors available via drive digital operator
keypad. This Object Class is designed specifically for Yaskawa drives.
A built-in Modbus protocol and addressing scheme is standard in all Yaskawa drives. The option converts the DeviceNet
message to Modbus for use internally in the drive.
Yaskawa Drive Parameter Object Class 100 is modeled after the drive's internal Modbus addressing scheme. The DeviceNet
path for each drive parameter is derived by converting the drive's Modbus register number to the DeviceNet path, Class/
Instance/Attribute. Reading or writing parameters to the drive via DeviceNet is simplified because the DeviceNet path closely
matches the drive's Modbus register numbers.
•
The DeviceNet Class for parameter access is always “64”.
•
The DeviceNet Instance is always equal to Modbus register byte 1 or the MSB (most significant byte).
•
The DeviceNet Instance is always equal to Modbus register byte 0 or the LSB (least significant byte).
•
The data size for each Attribute is 2 bytes.
Refer to the drive User Manual for description on the parameters and Modbus Manual for Modbus registers.
Example 1:
Reading the Reference Source Parameter b1-01 Value by Explicit Messaging
To read parameter b1-01 (Modbus register 0180 Hex) Reference Source, first convert the Modbus register number to DeviceNet
Instance and Attribute.
Then, send an explicit message with Service Code 0E Hex (Get Attribute Single) to Class 64/Instance 1/Attribute 80 Hex. If the
returned value is 0001 Hex, then Reference Source is set to Parameter Setting 1, Terminals.
Note: The same Class/Instance/Attribute paths are used in the EDS file provided by Yaskawa.
Table 40: Supported Service
Service Code No. (Hex) Service Name Description of Service
0E Get_Attribute_Single Designated attribute content is returned.
10 Set_Attribute_Single Designated attribute content is changed.
Table 41: Converting the Modbus Register Number to the DeviceNet Path
Modbus Register: 0180 Hex DeviceNet Path: 64/01/80 Hex
Example Data Example Data
- - Class 64 Hex
Byte 1 01 Hex → Instance 01 Hex
Byte 0 80 Hex
→
Attribute 80 Hex
Modbus register 01 80 hex = Instance 01 hex and Attribute 80 hex