Hitachi SJ-PB(T) instruction manual Parameter Examples, Writing a four byte parameter, Operating

CHAPTER5 OPERATING

5.4 Parameter Examples

5.4.1 Writing a four byte parameter

In this first example, PPO1 is used to set parameter F002 (1st Acceleration time 1) to 4.00 seconds. Also, a Start command and a frequency set-point (50%) is given.

Please note: When reading/writing parameters via the Profidrive profile the cross-reference list must be used, see chapter 5. For example, parameter F002 (1st Acceleration time 1) have parameter number 23 (17h) on Profibus.

Word

Request:

PLC->Inverter

Response:

Inverter->PLC

	PKW				PZD
1		2	3	4	5	6
	PKE	IND	PWE	PWE	STW	HSW
					ZSW	HIW
	30 17	00 00	00 00	01 90	04 06	20 00
					04 7F*
	20 17	00 00	00 00	01 90	03 31	20 00
					03 37

In the request message the first two bytes are used for parameter identification. The first digit (2) denotes the function “Change parameter value (long word)” (refer to chapter 3.2). The second digit along with the second byte (0 and 17) indicates parameter number 23. Bytes 7 and 8 (01 90 = DEC 400) is the parameter value (400 meaning 4.00 seconds). The last four bytes are the Control Word and Frequency set-point. Control Word value 04 06 -> 04 7F* starts the motor, while 20 00 (refer to 5.3.2) signifies 50 % of the maximum frequency specified in parameter A004.

In the response message, the first digit (2) indicates the function “Transfer parameter value (long word)”. Value (01 90 in bytes 7 and 8) and parameter number (x0 17) are mirrored from the request. The last four bytes are Status Word and Actual frequency (%).

5.4.2 Writing a two byte array parameter

In this second example, we are configuring PZD3 to contain the value of parameter A038, “Jogging frequency” in the responses from the inverter to the master (PLC). PPO2 is used. On Profibus parameter A038 corresponds to parameter number 61 (3Dh). This is configured with parameter number 916 (394h), “Assignment of PZD read word” (see also chapter 5.3. and 5.5).

	PKW				PZD
Word	1	2	3	4	5	6	7	8	9	10
	PKE	IND	PWE	PWE	STW	HSW	PZD3	PZD4	PZD5	PZD6
					ZSW	HIW
Request:	73 94	01 00	00 00	00 3D	04 06	20 00	00 00	00 00	00 00	00 00
PLC->Inverter
					04 7F
Response:
	43 94	01 00	00 00	00 3D	03 31	20 00	01 F4	00 00	00 00	00 00
Inverter->PLC					03 37

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