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Establish a Data Echo
Between the Interface
Module and the SLC
Processor
Bit
15
Word
(1)
Module
0
Mode
Bit
1
2
3
4
5
6
7
(1)
The output status word is defined on page 6-6. To write the echo data packet, the Read or Write bit must be 0 and the Module Mode Bit can be either 0 or 1.
Whether in software Run or software Configuration mode, the SLC
processor can send data in the Output Image file to the interface
module and have it echoed back by the module's Input Image file.
This feature gives the SLC processor the ability to verify that the
module is operating properly. If the data is not echoed back, the
module is assumed to be operating incorrectly and is forced into a
reset by the SLC processor.
See the section Resetting the Interface Module from the SLC processor.
Establish a Data Echo
With the SLC processor you
1. Set the Data ID to 6 (O:e.0/0...3).
2. Load known data into words 1...7
of the output file (O:e.1...7).
3. Set the Data Handshaking bit
(O:e.0/14).
7. Verify that the Input File words
1...7 (I:e.1...7) match the Output
File (O:e.1...7).
8. Reset the Data Handshaking Bit
(O:e.0/14).
The SLC processor can set up the Data Echo configuration by building
the configuration packet shown below.
SLC Output File to the Interface Module
14
13
12
11
Data
Read
Reset
Hand
or
Interface
shake
Write
Module
Bit
Bit
Bit
AB Parts
Module Configuration Using the Backplane
The interface module then
4. Verifies that the DF1 and DH-485
5. Loads the data from the output
6. Sets the Data Handshaking Bit
9. Resets the Data Handshaking Bit
10
9
8
7
6
Reserved
User-defined Data
User-defined Data
User-defined Data
User-defined Data
User-defined Data
User-defined Data
User-defined Data
ports are okay.
file into the input file.
(I:e.0/14).
(I:e.0/14).
5
4
3
2
Data ID=6
Publication 1747-UM005B-EN-P - March 2006
6-17
1
0
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