6.3 MEMOBUS/Modbus Communications
282 YASKAWA SIEPC71061737B GA800 Drive Technical Reference
Byte
Command Message Response Message (when normal) Response Message (when there is a fault)
Setting Data
(Hex.)
Setting Data
(Hex.)
Setting Data
(Hex.)
10
Holding register
1 data
Upper 17 - -
11 Lower 70 - -
12
Holding register
2 No.
Upper 00 - -
13 Lower 04 - -
14
Holding register
2 data
Upper 05 - -
15 Lower DC - -
16
CRC-16
Upper 55 - -
17 Lower 59 - -
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, the H5-11
[Comm ENTER Command Mode] setting sets the function to enable these parameters from the Enter command. This
section gives information about the Enter command.
■ Types of Enter Commands
The drive supports the two Enter commands shown in Table 6.9.
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.
Table 6.9 Types of Enter Commands
Register No.
(Hex.)
Description
0900
When you write parameter data to the EEPROM, you will enable the data on the RAM at the same time.
This process saves the parameter changes until you de-energize the drive.
0910
This updates the data on the RAM, but does not write data to the EEPROM.
This process saves the parameter changes until you de-energize the drive.
Note:
• You can write the EEPROM to the drive a maximum of 100,000 times. Do not frequently execute the Enter command (0900 (Hex.)) that is
written to EEPROM. The Enter command register is write-only. If this register is read, it will cause a Register Number Error (02 (Hex.)).
• When the command data or broadcast message is transmitted to the drive, the Enter command is not necessary.
■ Functions of the Enter Command when Replacing a Previous Generation Drive
When you replace a previous generation Yaskawa drive with this product, you must set the Enter command function
for this product the same as the previous product. The Enter command function is different for Yaskawa G7, F7-
series, and V7-series drives.
Use H5-11 to set the Enter command function:
• When replacing G7 and F7 series drives, set H5-11 = 0 [ENTER Command Required].
• When replacing V7 series drives, set H5-11 = 1 [ENTER Command Not Required].
• When replacing 1000-series drives, set H5-11 to the same value as the drive you replaced.
Table 6.10 Enter Command Function Differences
H5-11 Settings H5-11 = 0 H5-11 = 1
The drive you replaced G7, F7 V7
Time when the parameter settings are enabled
When the drive receives the Enter command from the
master
When you change the parameter settings
To Next Page
Loading...
