Rockwell-automation 1734-IK Encoder/Counter Modules User Manual Instrukcja Użytkownika Pobierz pdf (Strona 51)

Publication 1734-UM006B-EN-P - August 2005

Access Instantiated Instances 5-3

Assemblies

Available assemblies are:

• Assembly 101 is produced for a polled connection.

• Assembly 102 is produced for a Change Of State (COS)

connection.

• Assemblies 103, 104 and 106 are by Explicit message only.

• Assembly 105 is consumed in a polled connection .

Data may be read (get) or written (set) using an Explicit Message. For

example, to read the Present Channel Data, assembly 101

(65

) can

be requested.

Data is ordered as followed (byte 0 is the least significant byte):

8 bit byte Byte 0

16 bit word Byte 0, byte 1

32 bit long word Byte 0, byte 1, byte 2, byte 3

In this example, assembly 101,

Service Class Instance Attribute

0E (Get) 04 (Assembly) 65 (Present Data) 03 (Data Attribute)

Instances Services Field Bytes

#101 (0x65) Get Present Channel Data 4

Status 2

#102 (0x66) Get Stored Channel Data 4

Status 2

#103 (0x67) Get Present Channel Data 4

Stored Channel Data 4

Status 2

#104 (0x68) Get Programming Error Code 2

#105 (0x69) Set/Get Counter Control 1

1 2 ... 46 47 48 49 50 51 52 53 54 55 56 ... 67 68

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Rockwell-automation 1734-IK Encoder/Counter Modules User Manual Instrukcja Użytkownika Strona 51