Technical data

7.2 Structure of DX 0
DX 0 is made up of the following three parts:
•• the start ID for DX 0 (DW 0, 1 and 2)
•• several fields of varying lengths (depending on the number of
parameters)
•• the end delimiter EEEE.
Start ID ASCII characters MASKX0 in DW 0 to DW 2
Field A field in DX 0 consists of 1 to n data words, these contain the
following:
•• the field ID
•• the field length
and
•• the field parameters.
The
field ID explains the meaning of the parameters that follow. Each
field is assigned to a specific system program part or to a specific
system function (e.g. field ID "04" means cyclic program execution).
Field length The field length indicates the number of data words needed for the
parameters that follow.
Parameters Section 7.3 describes the possible parameters.
Numerical values are specified in hexadecimal format (KH).
End ID This indicates the end of DX 0 with EEEEH in the last data word.
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Structure of DX 0
CPU 928B Programming Guide
C79000-B8576-C898-01
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