B14

Loopback Test [08h]:

This function checks a master-slave transmission using any test data. An example follows:

Send test data to an inverter having slave address “1” and receiving the test data from the inverter (as a loopback test).

Appendix B

Query:

No.

Field Name

Example

(Hex)

 

 

1

Slave address *1

01

2

Function code

08

3

Test subcode

00

 

(high order)

 

4

Test subcode

00

 

(low order)

 

5

Data (high order)

Any

6

Data (low order)

Any

7

CRC-16 (high order)

CRC

8

CRC-16 (low order)

CRC

Note 1: Broadcasting is disabled.

Response:

No.

Field Name

Example

(Hex)

 

 

1

Slave address *1

01

2

Function code

08

3

Test subcode

00

 

(high order)

 

4

Test subcode

00

 

(low order)

 

5

Data (high order)

Any

6

Data (low order)

Any

7

CRC-16 (high order)

CRC

8

CRC-16 (low order)

CRC

When test subcode is for echo (00h, 00h) only and not available to the other commands.

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Hitachi X200 Series instruction manual 14, Loopback Test 08h