Job identifier, Receive jobs from a cp, Data block (db) – ProSoft Technology MVI56-S3964R User Manual
Page 59: Data word (dw), Number of data words/data bytes, Coordination byte 9/10, Data type, Receive jobs
Reference MVI56-S3964RT
♦ TControlLogix PlatformT
TSiemens 3964R ProtocolT
ProSoft Technology, Inc.
Page 59 of 78
Job Identifier
The job identifiers are defined as follows:
Send jobs to a CP:
Job:
Identifier:
3964R with RK512: DB-SEND to CP
0041hex
3964R with RK512: DB-FETCH to CP
0045hex
The MVI56-S3964R receives jobs from a CP automatically without extra
parameterization. To differentiate the header data the MVI56-S3964R adds a
header to the user data received and transfers it to the ControlLogix processor.
Receive jobs from a CP
Job:
Identifier:
3964R with RK512: DB-SEND from CP
1141hex
3964R with RK512: DB-FETCH from CP
1145hex
Data Block (DB)
Number of the data block. This data block must exist in the communication
partner (3964R with RK512 only, otherwise to be set to "0").
Data Word (DW)
Number of the data word in the selected data block. The selected data block
must contain this number (3964R with RK512 only, otherwise to be set to "0").
Number of Data Words/Data Bytes
Dependent on the type of communication mode used on port 1/2 of the module,
this value will be interpreted as number of data words. This value defines
whether a job will be carried out with or without subsequent telegram. For jobs
without subsequent telegram the value will be 1 ... 64 words (1 … 128 bytes),
and for jobs with subsequent telegram(s) it will be 65 ... 256 words (129 … 512
bytes).
Coordination Byte 9/10
3964R with RK512 send jobs offer the possibility of entering so called
coordination bytes (byte 9 and 10 in the RK512 telegram header). Otherwise to
be set to "0".
Data Type
The send message can request a data type of Data Words (44h) or Marker
(4Dh). If the value is 0 (zero), then data words is used.
Receive Jobs
To receive jobs from a CP only, no additional parameterization is necessary. The
user data received is stored in a file in the ControlLogix processor.
The following table shows an example of the data stored in HeaderCom1 in case
of a DB-Send from a CP. The CP is connected to port 1.
April 17, 2008