ProSoft Technology MVI56-S3964R - Manual (Page 60)

MVI56-S3964RT ♦ TControlLogix PlatformT Reference
TSiemens 3964R ProtocolT
Page 60 of 78 ProSoft Technology, Inc.
Word: High Byte: Low Byte:
0 1141hex
1
00 Data Block (DB)
2 00 Data Word (DW)
3 Number of data words (total number) 1
4 Number of data words (actual block) 2
5 00 00
6 00 00
7 00 00
8 00 00
9 00 00
1 = This is the total number of data words for the whole job.
2 = This is the number of data words stored in RecvDataCom1.
The user data is copied to RecvDataCom1. This is the file you should operate
with.
For port 2, which is similar to port 1, the file for storing the user data received is
called RecvDataCom2.
Send Jobs
To send a job to a CP, the next step is to define the appropriate header for the
job. The following table shows an example of the header data for a DB-Send job
to a CP with the following parameters:
DB = 10, DW = 0, 128 words, coordination byte 9 = FFhex, coordination byte 10
= FFhex, Data Type = 44hex.
Word: High Byte: Low Byte:
0 0041hex
1 00
10
2 00 0
3 80hex (= 128dec)
4 FFhex FFhex
5 00 44hex
6 00 00
7 00 00
8 00 00
9 00 00
A DB-Fetch job will be parameterized similar to the example above.
To send with 3964R without RK512 to a CP (identifier 00FFhex), the values for
DB, DW and the coordination bytes will be ignored and can be set to "0".
The next step is to copy the user data into the appropriate files of the
ControlLogix processor.
April 17, 2008