Siemens ET 757 E Series Instruções de Operação descarregar pdf (Página 105)

Commissioning and optimization (software)

7.4 Commissioning of communication between the S7 CPU and the frequency converter

ET 200pro FC

Operating Instructions, 11/2007, A5E01100763B AA

105

Table 7-11 Parameter response

Word

Byte Byte

Request reference mirrored Request ID Response header

Drive object ID mirrored Qty Parameters

Format Qty Values

Values or error values

1. parameter value(s) (only after a

"request")

…

Format Qty Values

Values or error values

n. parameter value(s)

…

Description of the fields for a parameter request and response

Table 7-12 Description of the fields for parameter requests

Field Data type Values Remark

Unsigned 8 0x01 … 0xFF Request reference

Unambiguous identification of the request/response pair for the master. The

master changes the request reference with each new request. The slave mirrors

the request reference in its response.

Unsigned 8 0x01 0x02 Read request, write request Request ID

Specifies the request type. In the event of a write request the changes are saved

to volatile memory (RAM). A save operation is required in order to transfer the

data to non-volatile memory (P0971).

Unsigned 8 0x00 … 0xFF Number Drive object ID

Setting for the drive object number with a drive unit with more than one drive

object. Different drive objects with separate parameter number ranges can be

accessed at the same DPV1 connection.

Unsigned 8 0x01 … 0x27 No. 1 ... 39 Limited by the length of

the DPV1 telegram

Qty Parameters

In the case of multiple requests, defines the number of adjacent areas for the

parameter address and/or the parameter value for multiple parameter requests.

The number of parameters = 1 for individual requests.

Unsigned 8 0x10

0x20

0x30

Value Description Text (not

implemented)

Attribute

Type of parameter element being accessed.

Unsigned 8 0x00

0x01 … 0x75

Special function no. 1 ... 117 Limited

by the length of the DPV1 telegram

Qty of elements

Number of field elements being accessed.

Unsigned 16 0x0001 …

0xFFFF

No. 1 … 65535 Parameter number

Number of parameter being accessed.

1 2 ... 100 101 102 103 104 105 106 107 108 109 110 ... 189 190

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