User`s guide

4: FMP Link Conﬁguration Options

DC 900-1339H 83

To set this option using the DLI conﬁguration ﬁle, use the

messageBlocking parameter;

for example,

messageBlocking = “DataHdr”. See Table 5–1 on page 104.

4.13.1 Raw Blocks

On inbound messages with Message Blocking set to Raw Blocks, FMP strips any leading

PAD or SYN characters from the message. The FMP software also strips any trailing

PAD characters from the message. The message is sent to the client with all bisynchro-

nous control characters and all block check characters (BCCs) present. Figure 4–7 is an

example of the Raw Blocks setting using the sample received data blocks shown in

Figure 4–6 on page 82.

An outbound message with Message Blocking set to Raw Blocks must be sent to FMP

with any necessary control characters (that is, SOH, ETB, or ETX) embedded in the

message. In front of the message, FMP inserts a PAD character followed by the number

of SYN characters speciﬁed by the number of leading SYN characters option

(Section 4.3). The message is followed by a PAD character. Figure 4–8 is an example of

an outbound message with the Raw Blocks option.

Figure 4–7: Message Blocking Example (Raw Blocks)

<soh> A B C

Message Blocking = Raw Blocks

Data Packing = Disabled

<soh> D E F

<soh> G H I

J K L <etx>

<bc4>

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