Inficon LDS3000 Modular Leak Detector Interface descriptio Bedienungsanleitung PDF herunterladen (Seite 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

Floating point/real

number

FLOAT IEEE 754

20 no data NO_DATA

For commands without data, such as

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Inficon LDS3000 Modular Leak Detector Interface descriptio Bedienungsanleitung Seite 30