HMS Networks Anybus CompactCom 40 Network Manual page 132

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Anybus CompactCom 40 - PROFINET IRT Transparent
Ethernet
11.7.10. Command Details: Expected_Ident_Ind
Category
Extended
Details
Command Code: 1Bh
Valid For: Object Instance
Description
The module issues this command to inform the host application of the Expected Identification (Module/
Submodule List) that the IO Controller will use for the established AR.
Note that this information may be split in multiple segments, which means that this command will be issued
multiple times by the module, each time containing different parts of the configuration.
Expected_Ident_Ind is similar to AR_Info_Ind but uses a different segmentation protocol that shall be used for
the CompactCom 40 series, see Anybus CompactCom 40 Software Design Guide (Message Segmentation).
For very large configurations where the Expected Identification cannot fit into one message, this segmentation
protocol will be used. If the number of modules/sub-modules exceeds the capabilities of the Anybus
CompactCom the message will be truncated. The size of the configuration can be up to 2370 bytes at maximum
number of modules/sub-modules.
It is optional to implement support for this command.
• Command Details
Field Contents
CmdExt[0] Reserved
CmdExt[1] Cmd segment bits
MsgData[0] AR handle (low byte)
MsgData[1] AR handle (high
byte)
MsgData[2.. n] Data field
• Response Details
Field Contents Comments
CmdExt[0] Reserved (set to zero)
CmdExt[1]
MsgData[0] Continue/
Block
Returning any error response or providing no data/ too much data will give the same result as responding with
Continue (0).
The timeout is 300 seconds. A "Continue" response or the Ident_Change_Done command should be sent well
within this time limit.
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Comments
For segmented messages the CmdExt[1] byte has been reserved for segment bits, see Anybus
CompactCom 40 Software Design Guide (Message Segmentation).
Handle for the Application Relationship.
The first two bytes in the initial block of the Data field indicates the number of modules in the
configuration. Each module is represented by a Module block, followed by a number of Submodule
blocks (provided that the module in question contains submodules). See "Data Format" below for
coding of the data field.
Value: Meaning:
0 Continue. The host application will not perform any changes to the Real Identification, A connect response may be
sent on the network immediately following this response.
1 Block. The host application will perform changes in the Real identification in response to the received Expected
identification. A connect response will not be sent on the network until Ident_Change_Done is sent by the host
application
PROFINET IO Object (F6h)
SCM-1202-021 Version 2.6