YASKAWA GA800 Technical Reference page 322

6.3 MEMOBUS/Modbus Communications
Command Message
Byte
2 Upper
Starting No.
3 Lower
4 Upper
Data Qty
5 Lower
6 Byte No.
7 Upper
First data
8 Lower
9 Upper
Next data
10 Lower
11 Upper
CRC-16
12 Lower
13
14
15
16
Note:
The number of bytes set in the command message set the data quantity × 2 during the command message.
bit 0
bit 1
bit 2
bit 3
bit 4
bit 5
bit 6
bit 7
■
Reading the Contents of Non-Consecutive Holding Registers
The drive uses function code 67 (Hex.) and subfunction code 010D (Hex.) to read data with a maximum of 120
holding registers.
You must give the holding register number from which to read separately.
Table 6.11 shows example messages when you read the frequency reference and torque limit from the drive for slave
1. Table 6.11 uses these specified holding registers data for the examples.
• 0024H:U1-01 [Frequency Reference] = 60.00 Hz (6000 = 1770H)
• 0028H:U1-09 [Torque Reference] = 100.0% (1000 = 03E8H)
322
Response Message (when normal)
Setting Data
(Hex.)
00
Data in holding
01
register 1
selected with H5-
00
25
Data in holding
02
register 2
selected with H5-
04
26
Data in holding
00
register 3
selected with H5-
01
27
Data in holding
17
register 4
selected with H5-
70
28
4F
Starting No.
43
-
Data Qty
-
-
CRC-16
-
Data in register 1 selected with H5-25
1: Successfully read the register
0: Register read error
Data in register 2 selected with H5-26
1: Successfully read the register
0: Register read error
Data in register 3 selected with H5-27
1: Successfully read the register
0: Register read error
Data in register 4 selected with H5-28
1: Successfully read the register
0: Register read error
Not used
Not used
Not used
Not used
Setting Data
(Hex.)
Register status 0F
Upper 17
Lower 70
Upper 07
Lower D0
Upper 10
Lower 00
Upper 00
Lower 00
Upper 00
Lower 01
Upper 00
Lower 02
Upper AC
Lower D0
Register status
YASKAWA SIEPC71061737D GA800 Drive Technical Reference
Response Message (when there is a fault)
Register status
Data in holding
Upper
register 1
selected with H5-
Lower
25
Data in holding
Upper
register 2
selected with H5-
Lower
26
Data in holding
Upper
register 3
selected with H5-
Lower
27
Data in holding
Upper
register 4
selected with H5-
Lower
28
Error Codes
Upper
CRC-16
Lower
-
-
-
Setting Data
(Hex.)
0F
17
70
07
D0
10
00
00
00
02
E9
6C