Eaton ELC-CODNETM, User Manual

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ELC-CODNETM
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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
z
ReqID: When sending every explicit message, the user has to assign a Request ID for
this explicit message. ELC-CODNETM scanner identifies the response message by
this ID. Therefore, the user has to change the ID value when completing an explicit
message communication for the next transmission.
z
Command code: Fixed to 01 for every message transmission.
z
Port: Reserved as 0 for every message transmission.
z
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..
z
Service code: The service code of this explicit message.
z
MAC ID: The node address of target devices.
The format of explicit message response:
Words Input explicit response
D6000 ReqID Status
D6001 Port Size Message Header
D6002 Service code MAC ID
Message Data D6003 ~ D6031 Service response data
z
The definitions of ReqID, Port, Service Code and MAC ID are the same as their
definitions in request message.
z
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.
z
See the table below for the meanings of Status (status codes):
Status Explanation
0 No explicit message is sent out.
1 The communication of explicit message is successful.
2 The explicit message is being sent out.