Communicate real time/nonreal time information, Safe state values (configuration word 10) – Rockwell Automation 1734-IK Encoder/Counter Modules User Manual User Manual
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Publication 1734-UM006B-EN-P - August 2005
3-8 Input and Output Data
Safe State Values (Configuration Word 10)
When either the host transitions to PROGRAM mode or a
communication fault (broken network cable) occurs, the module
copies the safe state word (counter control value) into its real-time
working buffer. The definitions are identical to those described under
Real-time Output Data.
Communicate Real
Time/Nonreal Time
Information
The Encoder/Counter Module uses several words to communicate real
time input and output data as well as non-real time module
information (such as description and revision) and configuration.
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. The following table shows the words which can be
exchanged.
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
#106 (0x6a)
Set/Get
Counter Configuration
1
Filter Selection
1
Decimal Position
1
Reserved
1
Time Base
2
Gate Interval
1
Scalar
1
Rollover Value
4
Preset Value
4
Counter Control SSV
1