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8.4.3
System Message Block
System messages originate from the receiver and are sent to the automation computer. The length of the
message is dependent on its function of the message. All system messages are sent separately from one
another and from other types of messages.
A typical system message looks like this:
Example:
<$02><"051697"><$22><"124039"><$22><"02"><$22><"0001"><$22><70h><"01"><V-byte><$0D>
Table 8–10 lists the components of the system message block example and gives a description for each of
them.
8.4.3.1
System Messages
Table 8–11 lists all the system messages that the receiver can send to the automation computer.
Table 8–9: Bad Data Field Indicator Components
Character
<$23>
Bad data indicator
<aaaaaaaa>
Bad data ASCII hex data dump.
<$23>
Bad data indicator
<bbbbb>
Bad data ASCII hex data dump.
<$05>
Account number field indicator
<"123456">
Account number.
<$22>
Separator - Good data.
<"BA01">
Panel Data. See 8.4.2.2.
<V-byte>
Validation Byte. See Section 8.4.5.
<$0D>
End of message indicator.
<AE header><System><V-byte><$0D>
Table 8–10: System Message Components
Character
<$02>
Message type identifier.
<"051697">
Date information, consisting of six ASCII bytes.
<$22>
Separator
<"124039">
Time information, consisting of six ASCII bytes
<$22>
Separator
<"02">
Receiver number
<$22>
Separator
<"0001">
Reference number, consisting of four ASCII
bytes.
<$22>
Separator
<$70>
System event - line card trouble. See 8.4.3.1 for
list of system messages.
<"01">
Line Card number - 01.
<V-byte>
Validation Byte (V-byte). See Section 8.4.5.
<$0D>
End of message indicator.
Section 8 – Automation Communication Formats
Description
Description
8–7
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