6.1 MEMOBUS/Modbus Communications
YASKAWA
SIEPYEULA5001C LA500 Technical Manual
143
Byte
Command Message
Response Message (When Normal)
Response Message (When There is a Fault)
Setting Data (Hex.)
Setting Data (Hex.)
Setting Data (Hex.)
11
CRC-16
Upper
6D
-
-
12
Lower
B7
-
-
Note:
The number of bytes set in the command message set the data quantity × 2 during the command message. The response message uses
the same formula.
■
Writing to More than One Holding Register/Reading the Indicated Register
The drive uses function code 5A (Hex.) to write to more than one register, then it reads the contents of four
holding registers at the same time.
The function for writing to more than one register is the same as the function for function code 10 (Hex.). You can
write to a maximum of 16 holding registers.
The four holding registers to be read from are specified in
H5-25 to H5-28 [Function 5A Register x Selection]
.
shows example messages when you write to more than one holding register or when you read more than
one command register.
uses this register data for the examples:
•
The drive for slave 1 is set for Forward run with a frequency reference of 60.00 Hz.
•
The setting in
H5-25
to
H5-28
and the data in the specified holding registers are as follows.
–
H5-25
= 0044H:
U1-05 [Motor Speed]
= 60.00 Hz (6000 = 1770H)
–
H5-26
= 0045H:
U1-06 [Output Voltage Ref]
= 200.0 V (2000 = 07D0H)
–
H5-27
= 0042H:
U1-03 [Output Current]
= 50% of drive rated current (100% = 8192, 50% = 4096 = 1000H)
–
H5-28
= 0049H:
U1-10 [Input Terminal Status]
= 00H
When you rewrite the parameter value with the write command through the
H5-11 [Comm ENTER Command
Mode]
setting, you must use the Enter command to save and enable the contents of the changes. Refer to
Comm ENTER Command Mode on page 324
and
for more information.
Table 6.9 Message Example When Writing to More than One Holding Register/Reading the Indicated Register
Byte
Command Message
Response Message (When Normal)
Response Message (When There is a Fault)
Setting Data
(Hex.)
Setting Data
(Hex.)
Setting Data
(Hex.)
0
Slave address
01
Slave address
01
Slave address
01
1
Function code
5A
Function code
5A
Function code
DA
2
Starting No.
Upper
00
Register status
0F
Register status
0F
3
Lower
01
Data in holding
register 1
selected with
H5-25
Upper
17
Data in holding
register 1
selected with
H5-25
Upper
17
4
Data Quantity
Upper
00
Lower
70
Lower
70
5
Lower
02
Data in holding
register 2
selected with
H5-26
Upper
07
Data in holding
register 2
selected with
H5-26
Upper
07
6
Byte No.
04
Lower
D0
Lower
D0
7
First data
Upper
00
Data in holding
register 3
selected with
H5-27
Upper
10
Data in holding
register 3
selected with
H5-27
Upper
10
8
Lower
01
Lower
00
Lower
00
9
Next data
Upper
17
Data in holding
register 4
selected with
H5-28
Upper
00
Data in holding
register 4
selected with
H5-28
Upper
00
10
Lower
70
Lower
00
Lower
00
11
CRC-16
Upper
4F
Starting No.
Upper
00
Error code
02
12
Lower
43
Lower
01
CRC-16
Upper
E9
13
-
Data Quantity
Upper
00
Lower
6C
14
-
Lower
02
-
15
-
CRC-16
Upper
AC
-
16
-
Lower
D0
-
Summary of Contents for LA500
Page 2: ...This Page Intentionally Blank 2 YASKAWA SIEPYEULA5001C LA500 Technical Manual...
Page 10: ...10 YASKAWA SIEPYEULA5001C LA500 Technical Manual...
Page 18: ...i 3 Glossary 18 YASKAWA SIEPYEULA5001C LA500 Technical Manual...
Page 74: ...3 14 Wiring Checklist 74 YASKAWA SIEPYEULA5001C LA500 Technical Manual...
Page 164: ...6 1 MEMOBUS Modbus Communications 164 YASKAWA SIEPYEULA5001C LA500 Technical Manual...
Page 202: ...7 10 Troubleshooting Without Fault Display 202 YASKAWA SIEPYEULA5001C LA500 Technical Manual...
Page 218: ...8 6 Storage Guidelines 218 YASKAWA SIEPYEULA5001C LA500 Technical Manual...
Page 234: ...10 6 Peripheral Devices and Options 234 YASKAWA SIEPYEULA5001C LA500 Technical Manual...
Page 375: ...YASKAWA SIEPYEULA5001C LA500 Technical Manual 375...