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OEM communication protocol
Reference information
110
OEM protocol answer block characters
The answer block characters in the OEM communication protocol are
described below.
STX (Ctrl B or 02h)
The STX character indicates the beginning of a response string.
Master address
The master address is the address of the host system. This should always
be “0” or 30h.
Status and error codes
The status and error codes define pump status and notify of error condi-
tions. For a complete listing of error codes, see the instructions for the
particular pump.
Data block (length n bytes)
This is the response from all report commands except the [Q] command.
ETX (Ctrl C or 03h)
The ETX character indicates the end of the response string.
Checksum
The checksum is the last byte of the message string. All bytes (excluding
line synchronization and checksums) are XORed to form an 8-bit check-
sum. This is appended as the last character of the block. The receiver
compares the transmitted value to the computed value. If the two values
match, an error-free transmission is assumed; otherwise, a transmission
error is assumed.
Содержание C24000
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