SOFTWARE MANUAL C32
8 EXTENDED STATUS MESSAGES
The extended message format ensures that messages cannot be misunderstood as standard status messages or control
commands. Therefore messages are always a series of ASCII characters. Alternatively you can switch to a format
containing binary information also.
Messages are saved via a printer hardware CRC. The evaluation of the CRC is up to the user. Each message must be
identificable with an unique index, so that clear text, e.g. for the output of native language information, can be exchanged
at any time.
8.1 COMPOSITION OF A MESSAGE
Messages contain use data embedded into a standardized layout. All of them are printable ASCII characters of a defined
length. To make the message easily readable for the user separators are inserted. Moreover these help ensure the 4 byte
alignment of the use data which is necessary to form the 32 bit CRC. Each message consists of:
length
•
the opening brackets as message start identifier
1 byte
•
the original identifier
1 byte
•
type classification
1 byte
•
a colon as separator
1 byte
•
length
10 bytes
•
starting identifier of use data
2 bytes
•
use data
variable length divisible by 4
•
a possible position information in the use data range
•
the printer status #i_
4 bytes
•
the end identifier of the use data
2 bytes
•
the STM 32 bit hardware CRC
10 bytes
•
a colon as a separator
1 byte
•
a repetition of the original identifier
1 byte
•
a repetition of the type classification
1 byte
•
the closing bracket as message end identifier
1 byte
GeBE Elektronik und
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GeBE-document-no. SoMAN-C32-E-V2.2-0793
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date
July 7, 2020
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