14-15
Chapter 14
RS485 Communication
14.4.5
Loopback test [08h]
• Use this test for a communication check between the
master and slaves. For test data, arbitrary values can be
used.
(Example)
To perform a loopback test on the inverter with slave
address 1.
Query
Field Name
Example (HEX)
1
Slave address *1)
01
2
Function code
08
3
Diagnostic sub code (high)
00
4
Diagnostic sub code (low)
00
5
Data (high)
Arbitrary
6
Data (low)
Arbitrary
7
CRC-16 (high)
CRC
8
CRC-16 (low)
CRC
*1)
A broadcasting cannot be executed.
• Diagnostic sub codes correspond to query data echo
(00h, 00h) only and not to other commands.
Response
Field Name
Example (HEX)
1
Slave address
01
2
Function code
08
3
Diagnostic sub code (high)
00
4
Diagnostic sub code (low)
00
5
Data (high)
Arbitrary
6
Data (low)
Arbitrary
7
CRC-16 (high)
CRC
8
CRC-16 (low)
CRC
!
A
Summary of Contents for SJ Series
Page 39: ...5 4 Chapter 5 Included Items Memo ...
Page 55: ...6 16 Chapter 6 Installation Memo ...
Page 91: ...7 36 Chapter 7 Wire Connection and Optional Devices Memo ...
Page 135: ...9 40 Chapter 9 Operating Instructions Memo ...
Page 145: ...10 10 Chapter 10 Test Run Memo ...
Page 159: ...12 2 6 Chapter 12 Inverter Functions Memo ...
Page 169: ...12 3 10 Chapter 12 Inverter Functions Memo ...
Page 195: ...12 5 8 Chapter 12 Inverter Functions Memo ...
Page 217: ...12 8 12 Chapter 12 Inverter Function Memo ...
Page 287: ...12 10 32 Chapter 12 Inverter Functions Memo ...
Page 303: ...12 11 16 Chapter 12 Inverter Functions Memo ...
Page 349: ...12 15 8 Chapter 12 Inverter Function Memo ...
Page 395: ...12 17 34 Chapter 12 Inverter Functions Memo ...
Page 397: ...12 18 2 Chapter 12 Inverter Functions Memo ...
Page 415: ...12 19 18 Chapter 12 Inverter Function Memo ...
Page 581: ...15 10 Chapter 15 Optional Cassettes Memo ...
Page 591: ...16 10 Chapter 16 ProDriveNext EzSQ Memo ...
Page 642: ...18 49 Chapter 18 Tips FAQ Troubleshooting Memo ...
Page 650: ...19 8 Chapter 19 Maintenance and Inspection Memo ...
Page 781: ...Appendix 1 70 Appendix 1 List of Parameters Memo ...