Rockwell Automation 1734-IK Encoder/Counter Modules User Manual - Manual (Page 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
10
(65
16
) 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