Hitachi SJ700-2 Query Response Field name Sample setting, Intelligent input terminal

Chapter 4 Explanation of Functions

(v) Performing a loopback test [08h]

The loopback test function is used to check the communication between the external control system (master) and the inverter (slave).

(Example)

When performing a loopback test with the inverter at slave address "1":

Query				Response
		Field name	Sample setting			Field name	Sample setting
			(hexadecimal)				(hexadecimal)
	1	Slave address (*1)	01		1	Slave address	01
	2	Function code	08		2	Function code	08
	3	Diagnosis subcode (upper digit)	00		3	Diagnosis subcode (upper digit)	00
	4	Diagnosis subcode (lower digit)	00		4	Diagnosis subcode (lower digit)	00
	5	Data (upper digit)	Arbitrary		5	Data (upper digit)	Arbitrary
	6	Data (lower digit)	Arbitrary		6	Data (lower digit)	Arbitrary
	7	CRC-16 code (upper digit)	CRC		7	CRC-16 code (upper digit)	CRC
	8	CRC-16 code (lower digit)	CRC		8	CRC-16 code (lower digit)	CRC

*1 This query cannot be broadcasted.

The diagnosis subcode only conforms to the echoing of query data (00h, 00h). It cannot be used for other commands.

(vi) Writing data to multiple coils [0Fh]

This function rewrites data in sequential coils.

(Example)

When updating the status of the intelligent input terminals [1] to [6] of the inverter at slave address "5": The status of the intelligent input terminals is updated to the status shown in the following table:

Intelligent input terminal	1	2
Coil number	7	8
Terminal status	ON	ON

3	4	5	6
9	10	11	12
ON	OFF	ON	OFF

Query

	Field name	Sample setting
		(hexadecimal)
1	Slave address (*1)	05
2	Function code	0F
3	Starting coil number	00
	(upper digit) (*2)
4	Starting coil number	06
	(lower digit) (*2)
5	Number of coils (upper digit)	00
6	Number of coils (lower digit)	06
7	Number of data bytes (*3)	02
8	Updating data (upper digit) (*3)	17
9	Updating data (lower digit) (*3)	00
10	CRC-16 code (upper digit)	DB
11	CRC-16 code (lower digit)	3E

*1 If this query is broadcasted, no inverter will return any response.

*2 Note that the starting coil number is 1 less than the actual coil number of the coil to which the data is to be written first.

*3 The updating data consists of the upper and lower digits. Even when updating an odd number of data bytes, add 1 to the number of data bytes to make it an even number before specifying the number of data bytes.

Response

	Field name	Sample
		setting
		(hexadecimal)
1	Slave address	05
2	Function code	0F
3	Starting coil number (upper digit)	00
4	Starting coil number (lower digit)	06
5	Number of coils (upper digit)	00
6	Number of coils (lower digit)	06
7	CRC-16 code (upper digit)	34
8	CRC-16 code (lower digit)	4C

If the function to write data to multiple coils cannot be executed normally, the inverter will return an exception response. For details, see Item (viii), "Exception response."

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