YASKAWA HV600 Technical Reference page 748

10.6 MEMOBUS/Modbus Communications
■
Writing to Non-Consecutive Holding Registers
The bypass uses function code 67 (Hex.) and subfunction code 010E (Hex.) to read data with a maximum of 60
holding registers.
You must give the holding register number from which to write separately.
Table 10.28 shows example messages when you write the frequency reference and torque limit from the bypass for
slave 1. Table 10.28 uses these specified holding registers data for the examples.
• 0002H: Frequency Reference = 60.00 Hz (6000 = 1770H)
• 0006H: PID Setpoint = 12.34% (1234 = 04D2H)
If parameter values are changed using the Write command, an Enter command is necessary to activate and save the
data. Refer to H5-11: Comm ENTER Command Mode on page 309
information.
Table 10.28 Message Example When Writing to Non-Consecutive Holding Registers
Command Message
Byte
0 Slave address
1 Function Code
2
Subfunction
Code
3
4
Data Qty
5
6
Byte No.
7
8
Holding register
1 No.
9
10
Holding register
1 data
11
12
Holding register
2 No.
13
14
Holding register
2 data
15
16
CRC-16
17
Note:
The number of bytes set in the command message set the data quantity × 2 during the command message.
◆
Enter Command
When you use MEMOBUS/Modbus communications to write parameters from the PLC to the drive, an Enter
command is required to activate and save those parameters. This section gives information about the Enter
commands.
■
Types of Enter Commands
The drive supports the two Enter commands shown in
Write 0 to register number 0900 or 0910 (Hex.) to enable the Enter command. You can only write to these registers. If
you read to these registers, it will cause an error.
748
Setting Data
(Hex.)
01
67
Upper 01
Subfunction
Lower 0E
Upper 00
Data Qty
Lower 02
Upper 00
CRC-16
Lower 04
Upper 00
Lower 02
Upper 17
Lower 70
Upper 00
Lower 06
Upper 04
Lower D2
Upper 74
Lower CD
and Enter Command on page 748
Response Message (when normal)
Setting Data
(Hex.)
Slave address
Function Code
Upper
Code
Lower
Upper
Lower
Upper
Lower
-
-
-
-
-
-
-
-
-
-
Table 10.29.
YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
Response Message (when there is a fault)
01 Slave address
67 Function Code
01 Error Codes
0E Upper
CRC-16
00 Lower
02
D5
FC
for more
Setting Data
(Hex.)
01
E7
02
EA
31
-
-
-
-
-
-
-
-
-
-
-
-
-