Yaskawa G7 Modbus Communication - Manual (Page 13)

13
Communication Parameters
The following communications parameters affect communication over RS-232, RS-422 and RS-485 networks. The RS-232 communication
parameters are fixed. In addition, the node address is ignored when communicating via RS-232.
H5 group communication parameters can only be changed via the drive keypad.
Note: Drive power must be cycled for changes to H5 Group parameters to be recognized.
 RS-232 Communication
The RS-232 communications parameters are fixed at the values shown below. Although the node address is ignored, the master when
communicating to the G7 drive in this method typically uses a node address of 1.
Table 1.1 RS-232 (RJ-45 port) Communication Parameters
Value Description
Baud rate 9600
Parity None
Stop Bits 1
Node Address N/A
 RS-422/RS-485 Communication

Node Address – H5-01. The node address is set through G7 drive parameter H5-01. When communicating via RS-422 or RS-485, a
unique node address between 0 and 20h (32 decimal), inclusive, must be entered. The default G7 drive address is 1Fh (31 decimal).
The address is always entered as a hexadecimal number (refer to the conversion chart in Chapter 4). Address 0 is typically reserved for
global messages.

Baud Rate – H5-02. Select the baud rate that matches the controller’s communication configuration.
Table 1.2 Baud Rate – Parameter H5-02
Value Description
0 1200bps
1 2400bps
2 4800bps
3 9600bps (Default Setting)
4 19,200bps

Parity – H5-03. Select the parity that matches the controller’s communication configuration.
Table 1.3 Parity – Parameter H5-03
Value Description
0 None (Default Setting)
1 Even
2 Odd