Yaskawa VS-616G5 Modbus Plus Communication Card - Manual (Page 61)

Examples 9-17
MSTR Transaction #2
The Control Block and Data Block registers for the second MSTR must be loaded with the
following data before the MSTR block is executed. This MSTR writes to the Global Frequency
Reference Multiplier Register on drive #2.
CONTROL BLOCK
Register
Number
Register
Description
Register
Data
Data
Description
40240 Operation Code 0001h 0001h = Write to Multiple Registers
40241 Network Error Code 0000h The error code returned by Modbus Plus
communications
40242 Number of
Registers 0001h Write to 1 consecutive register
40243 Data Register Code F201h Global Write Data Register
40244 Routing 1 0002h Modbus Plus node address of the drive = 0002h
40245 Routing 2 0001h End of routing path = 0001h (Modbus Plus
requirement)
40246 Routing 3 0000h This routing register is not used, must be set to 0
40247 Routing 4 0000h This routing register is not used, must be set to 0
40248 Routing 5 0000h This routing register is not used, must be set to 0
DATA BLOCK
Register
Number
Register
Description
Register
Data
Data
Description
40250 Global Frequency
Reference Multiplier
01F4h
0500 (decimal) = .500 multiplier. Frequency in
002h register is multiplied by .500 on drive 2.