INFICON LDS3000 Modular Leak Detector Interface description - Manual (Page 30)

30 LD Protocol
Data types
All data types are used in Big Endian format (Motorola format), i.e. the byte with the
highest-order bits is transferred first.
Arrays
• Read single elements: Array index in first DATA-byte
• Write single elements: Array index in first DATA byte and values in following
DATA bytes
• Read all elements: Pseudo array index 255 in first DATA byte
• Write all elements: Pseudo array index 255 in first DATA byte and values in
following DATA bytes
• Response from slave (in case data are sent): Array index or pseudo array index
in first DATA byte and values in following DATA bytes
All elements of an array have the same Min/Def/Max value.
Value Meaning Acronym Comments
1 Signed 8 bit integer SINT8
2 Signed 16 bit integer SINT16
3 Signed 32 bit integer SINT32
4 Unsigned 8 bit integer UINT8
5 Unsigned 16 bit integer UINT16
6 Unsigned 32 bit integer UINT32
7 Character CHAR ISO 8859-1; printable characters
16 Signed 64 bit integer SINT64
17 Unsigned 64 bit integer UINT64
18
Floating point/real
number
FLOAT IEEE 754
20 no data NO_DATA
For commands without data, such as
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