YASKAWA PROFINET V1000 - Read and Write Block Structures

8 Communication
YASKAWA ELECTRIC SIEP C730600 70B V1000 Option SI-EP3/V Technical Manual 41
Read block is used in read requests and responses. Write block is used in write requests and responses. The request
consists of unique identifiers for the connection, addressing information and length of the record data. The response also
contains two additional fields for transferring information.
Table 23 Structure of the Read and Write Blocks
Data block contains PROFIdrive specific request or response header.
Table 24 PROFIdrive Request Header
Field(s) Description Range Type
Service Request or Response service.
Request (0x00)
Response (0x80)
UI8
Operation Read or Write operation. Write (0x08) Read (0x09) UI8
Block length Length of the block. 0 to 0xFFFF UI16
ARUUID
Identifier
- time low
- time mid
- time high and version - clock - node
–
UI32
UI16
UI16
Octet[2]
Octet[6]
API Application Process Identifier
Device Access Point (0x0000)
UI32
PROFIdrive (0x3A00)
Slot Slot of the Module Access Point (MAP/PAP) 0x01 UI16
Sub-slot Sub-slot of the Module Access Point (MAP/PAP) 0x01 UI16
Padding 2 bytes
Index Index of the Record Data Object
0x0001 to 0x7FFF
0xB02E
UI16
Data length Length of the data block 0 to 0xFFFFFFFF UI32
Additional value 1
(response only)
Field for transferring additional data – UI16
Additional value 2
(response only)
Field for transferring additional data – UI16
Padding 24 bytes for request, 20 bytes for response.
Data block Used only with write request and read response.
Field(s) Description Range Byte/ Word
Request Reference
Unique identification set by the master. Changed for
each new request.
1 to 255 Byte
Request ID Request type for the issued block.
Request Parameter (0x01)
Change Parameter (0x02)
Byte
DO-ID To be set to 0x01. 0 to 255 Byte
No. of
Parameters
Number of parameters that are present in the request. 1 Byte
Attribute Type of object being accessed. Value (0x10) Byte
No. of Elements
Number of array elements accessed or length of string
accessed. Set to 0 if non-array parameters are used.
0, 1 to 234 Byte
Parameter
Index (group)
Address of the PROFIdrive parameter that is being
accessed. Also “1” is allowed by SI-EP3/V to access
drive parameters.
Drive parameter group when accessing drive
parameters.
1 to 65535 Word
Subindex (parameter)
<1> Only when Request ID is 0x02 (Change Parameter). The Format, Number of Values, and Value Fields are repeated for other parameters.
Addresses the first array element of the parameter.
Drive parameter number when accessing drive
parameters.
0 to 65535 Word
Format
<1> Refer to Table 26 for details. – Byte
Number of Values <1> Number of values following. 1 Byte
Va lu es
<1>
The values of the request. In case of odd number of
bytes, a zero byte is appended to ensure the word
structure of the telegram.
Varies based on value See Format Field
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