S3964R
♦
ProLinx Gateway
Functional Overview
Siemens 3964R Protocol
Driver Manual
Page 50 of 64
ProSoft Technology, Inc.
April 14, 2009
Word
Value
Description:
305
0x1145
0x1145 = Response to DB-FETCH that was initiated by 3964R
Communication Partner.
306
0
Returned Data Block.
307
0
Returned Data Word.
308
5
Number of data words total. Sending 5 data words.
309
5
Number of data words block. Should be equal to Number of data words
total.
310
0
Reserved.
311
0
Reserved.
312
0
Reserved.
313
0
Reserved.
314
0
Reserved.
315
11
1st data word value.
316
22
2nd data word value.
317
33
3rd data word value.
318
44
4th data word value.
319
55
5th data word value.
5.5 Job
Processing
Both ports can be used independently from each other (multi tasking).
A possible initialization conflict will be solved as follows:
S3964R
has "High Priority":
The S3964R retries the sending of the 3964R start character (STX) three times
and waits for the Communication Partner to send the 3964R acknowledge (DLE).
If the Communication Partner does not send the acknowledge as expected the
communication will fail and has to be restarted.
S3964R
has "Low Priority":
The S3964R rejects its send job and sends the 3964R acknowledge (DLE) to the
Communication Partner.
Important:
If the S3964R has rejected its send job due to "Low Priority", you must restart its send
job completely (starting with the copying of the job data).
5.6 Reference
Documents
Siemens
Simatic CP544
Handbuch zum Kommunikationspartner CP544
Ausgabe 01
Bestell-Nr. 6ES5 998-2DB11
