User`s guide

4: FMP Link Conﬁguration Options

DC 900-1339H 89

No header is required on outbound messages. See Figure 4–8 on page 84 for an example

of transmitted data for this setting.

4.13.6 Message Blocking for the Bonneville Feed

If the line mode option (Section 4.18 on page 92) is set for the Bonneville feed, the fol-

lowing apply for transmitting and receiving packets.

For transmit: If message blocking is set to one of the raw modes, the user must supply

the entire Bonneville packet including the correct frame check sequence to the FMP

software. For all other modes, the user must supply only the bytes from the VCN high

ﬁeld to the last data byte. The FMP software adds the start and end ﬂags, address, byte

count, and FCS bytes to the packet before transmitting it.

For receive: If message blocking is set to one of the raw modes, the user receives the

entire Bonneville packet including the frame check sequence from the FMP software.

For all other modes, the user receives only the bytes from the VCN high ﬁeld to the last

data byte. The FMP software removes the start and end ﬂags, address, byte count, and

FCS bytes to the packet before transmitting. If there is an error on the received FCS, the

FMP software sets the

DLI_ICP_ERR_BAD_BCC error code in the appropriate header ﬁeld.

Figure 4–14: Message Blocking Example (Raw Blocks with Header)

09 00 0

<soh> A B C

Message Blocking = Raw Blocks (With Header)

Data Packing = Disabled

09 01 0

<soh> D E F

14 02 0

<soh> G H I

J K L <etx>

<bc4>

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