2nd Ave. Coffeemaker DVPDNET-SL DeviceNet Network Scanner User Manual

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DeviceNet Network Scanner DVPDNET-SL
DVP-PLC Operation Manual
21
1. Structure of request message
See the table below:
Request Message
PLC device
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
D6250 ReqID Command
D6251 Port Size
D6252
Message Header
Service Code MAC ID
D6253 High byte of Class ID Low byte of Class ID
D6254 High byte of Instance ID Low byte of Instance ID
D6255
Message Data
Reserved Attribute ID (optional)
D6256 ~ D6281 Service Data
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. For the next explicit message to be sent out, you have to change the ID
number. ReqID = 0 refers to DVPDNET-SL will not send out 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 Explanation
01Hex Read all attributes (Get_Attribute_All)
02Hex Set up all attributes (Set_Attribute_All)
0EHex Read a single attribute (Get_Attribute_Single)
10Hex Set up a single attribute (Set_Attribute_Single)
2. Structure of response message
See the table below:
Response Message
PLC device
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
D6000 ReqID Status
D6001 Port Size
D6002
Message Header
Service Code MAC ID
D6003 ~ 6031 Message Data Service Response Data
The definitions of ReqID, Port, Service Code and MAC ID are the same as their definitions in request
message.
Size: The length of the message, starting from D6003. Max. 58 bytes. Errors will occur when the
length is longer than 58 bytes. Unit: byte.
See the table below for the meanings of Status (status codes):

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