Yaskawa VS-616G5 Modbus Plus Communication Card - Manual (Page 35)

Special Modbus Plus Functions 7-3
Enabling Global Write
Each drive that will receive global write data must be initialized to do so. If a drive is not initialized
to receive global write data, it will ignore any global data that is transmitted on the MB+ network.
The data held in the Modbus Plus special data register F200h indicates the Modbus Plus node
address of the device (PLC) that will be sending the global data to the drive. The VS-616G5 drive
will only accept global data that is sent from this device. To enable global data, write the Modbus
Plus node address (1-64) of the device sending global data to register F200h. To disable global
data, write a ‘0’ to register F200h.
An example of enabling global data can be found in Chapter 9: Example #4 (write global run/stop
and frequency reference).
Executing a Global Read Function
An MSTR global read function (operation code = 6) will read eight specific status registers. The
global read function must be enabled by turning Dip switch SW1-8 ON. The status data can be
read by any PLC connected to a local MB+ network.
The following registers are considered the “Global Read Data”:
MSTR Function Data
Area
Function VS-616G5 Drive
Register Data Code
4X + 0 Operation Command 001h
4X + 1 Output Frequency F005h
4X + 2 Output Current F006h
4X + 3 DC Bus Voltage F008h
4X + 4 Drive Status F000h
4X + 5 Existing Fault Code 1 F009h
4X + 6 Existing Fault Code 2 F00Ah
4X + 7 Existing Fault Code 3 F00Bh
See Appendix A for more details on these Data Registers. An example of reading global registers
is shown in Chapter 9: Example #3 (Read Global Registers).