Yaskawa VS-616G5 Modbus Plus Communication Card - Manual (Page 76)

9-32 Examples
MSTR Transaction #3
The Control Block registers for the third MSTR must be loaded with the following data before the
MSTR block is executed. This MSTR reads drive status from drive #4.
CONTROL BLOCK
Register
Number
Register
Description
Register
Data
Data
Description
40740 Operation Code 0002h 0002h = Read from Multiple Registers
40741 Network Error Code 0000h The error code returned by Modbus Plus
communications
40742 Number of Registers 0010h Read from 16 consecutive registers
40743 Data Register Code F000h F000h = Drive Status Signals
40744 Routing 1 0004h Modbus Plus node address of the drive = 0004h
40745 Routing 2 0001h End of routing path = 0001h (Modbus Plus
requirement)
40746 Routing 3 0000h This routing register is not used, must be set to 0
40747 Routing 4 0000h This routing register is not used, must be set to 0
40748 Routing 5 0000h This routing register is not used, must be set to 0
The Data Block registers for the third MSTR will be filled with the following data after the MSTR is
completed.
DATA BLOCK
Register
Number
Register
Description
Register
Data
Data
Description
40750 Drive Status Signals READ RUN/STOP, FWD/REV, Drive Ready, etc.
40751 Motor Speed READ Motor Speed
40752 Torque Reference READ Torque Reference
40753 not used n/a n/a
40754 Speed Reference READ Frequency command to drive
40755 Output Frequency READ (0.1 Hz) Frequency at the drive
40756 Output Current READ Current at the output
40757 Analog Input READ Control Circuit Term 14 Input Volatge
40758 DC Bus Voltage READ (1.0 V) DC Bus voltage
40759 Fault Content 1 READ Overcurrent, Overvoltage,
40760 Fault Content 2 READ Drive Overload,
40761 Fault Content 3 READ etc.
40762 Analog Input READ Control Circuit Term 16 Input Voltage
40763 Digital Input READ Input Terminal Status
40764 Analog Input READ Control Circuit Term 13 Input Voltage
40765 not used n/a n/a