Yaskawa F7 Modbus - Manual (Page 11)

Connections 1-6
Communications Parameters
These communications parameters affect serial communications through RS232, RS422 and RS485. The RS232 communications parameters
cannot be changed. Also, the node address is ignored when communicating via RS232.
All serial communications parameters can only be changed via the operator keypad.
► RS232 Communications
The RS232 communications’ parameters are fixed at the values shown below. Although the node address is ignored, a node address of 1 is
typically used by the master when communicating to the F7 drive in this method.
Table 1.1 – RS232 (RJ45 port) Communications’ Parameters
Value Description
Baud rate 9600
Parity None
Stop Bits
1
Node Address N/A
► RS422/RS485 Communications
■ Node Address – H5-01
The node address is set through F7 drive parameter H5-01. When communicating via RS422 or RS485, a unique node address between 0
and 20h (32 dec), inclusive, must be entered. The default F7 drive address is 1Fh (31 dec). 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 serial configuration. The default baud rate is 9600 (3).
Table 1.2 – Baud Rate – Parameter H5-02
Value Description
0 1200
1 2400
2 4800
3 9600
4 19200
■ Parity – H5-03
Select the parity that matches the controller’s serial configuration. The default parity is None (0).
Table 1.3 – Parity – Parameter H5-03
Value Description
0 None
1 Even
2 Odd
■ Serial Fault Select – H5-04
Select the drive operation method when a serial fault (CE) is declared. The default method is Alarm Only (3).
Table 1.4 – Serial Fault Select – Parameter H5-04
Value Description
0 Ramp to Stop (Fault)
1 Coast to Stop (Fault)
2 Fast Stop (Fault)
3 Alarm Only (Alarm)
4 Run at d1-04 frequency