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DeviceNet Network Scanner DVPDNET-SL
5.2
Structure of Explicit Message
You can edit explicit messages in "explicit request message editing area" and "explicit response message
editing area". See the table below for the corresponding relation between the two areas and PLC devices. If
you transmit the request message to be sent out to D6250 ~ D6281, DVPDNET-SL will fill the response
message data to D6000 ~ D6031.
PLC device
D6000 ~ D6031
D6250 ~ D6281
1)
Structure of request message
See the table below:
PLC device
D6250
D6251
D6252
D6253
D6254
D6255
D6256 ~ D6281
Command: Fixed to "01Hex".
ReqID: The request ID. Whenever an explicit message is sent out, the message will be given a ReqID
for DVPDNET-SL to identify every message. For the next explicit message to be sent out, you have to
change the ID. ReqID = 0 indicates that DVPDNET-SL will not send out any explicit message. Range
of ReqID: 00Hex ~ FFHex.
Size: The length of the message, starting from D6253. The high bytes of D6255 are reserved. When
the data length is being calculated, D6255 is counted as 1 byte. The maximum data length is 58 bytes.
Errors will occur when the length is longer than 58 bytes. Unit: byte.
Port: The communication port. Fixed to "00Hex".
MAC ID: The node address of the target equipment on DeviceNet.
Service Code: The service code of the explicit message. See the meanings of the codes in the table
below:
Service Code
01Hex
02Hex
0EHex
10Hex
16
Mapping area
Explicit response message editing area
Explicit request message editing area
15 14 13 12 11 10 9
ReqID
Message Header
Port
Service Code
High byte of Class ID
Message Data
High byte of Instance ID
Reserved
Service Data
Read all attributes (Get_Attribute_All)
Set up all attributes (Set_Attribute_All)
Read a single attribute (Get_Attribute_Single)
Set up a single attribute (Set_Attribute_Single)
Mapping length
Request Message
8
7
6
Command
Size
MAC ID
Low byte of Class ID
Low byte of Instance ID
Attribute ID (optional)
Explanation
64 bytes
64 bytes
5
4
3
2
1
0
DVP-PLC Operation Manual
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