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201
Detailed Description of Services
Section 7-5
7-5-4
Echoback Test
This service executes an echoback test.
Command
Response
1.
Test Data
Any data in 2-byte hexadecimal format.
2.
Response Codes
Command/Response Example
Slave address:
H’01
Test data:
H’1234
Command: 01 08 0000 1234 ED7C (CRC-16)
Response: 01 08 0000 1234 ED7C (CRC-16)
1
1
2
2
H'08
H'00
H'00
Slave
address
Function
code
Fixed data
Test data
CRC-16
2
Function
code
Error
code
Error name
Cause
H’88
H’01
Function code error
A function code that is not supported was
specified.
H’03
Variable data error
• The command is too long.
• The command is not long enough.
• The fixed data was not H’0000.
H’08
---
Normal end
The service was processed normally.
1
1
2
2
H'08
H'00
H'00
Slave
address
Function
code
Fixed data
Test data
CRC-16
2
Summary of Contents for EJ1 EtherCAT
Page 2: ...EJ1 Modular Temperature Controllers User s Manual Revised July 2008 ...
Page 3: ...iv ...
Page 19: ...xx ...
Page 213: ...188 Detailed Description of Services Section 6 4 ...
Page 227: ...202 Detailed Description of Services Section 7 5 ...
Page 303: ...278 Index ...
Page 305: ......