S3964R
♦
ProLinx Gateway
Functional Overview
Siemens 3964R Protocol
Driver Manual
Page 42 of 64
ProSoft Technology, Inc.
April 14, 2009
Transmit Buffer
Receive Buffer
Item
Address
Transmit Value
Item
Address
Receive Value
D
((<port#> * 600) + 300) + 3 Reserved
J
(<port#> * 600) + 3
Error Code
E
((<port#> * 600) + 300) + 4 Data Count
K
(<port#> * 600) + 4
Data Count
F
((<port#> * 600) + 300) + 5
through ((<port#> * 600) +
300) + 299
Data
L
(<port#> * 600) + 5
through (<port#> *
600) + 299
Data
Now the ProLinx is writing the new data to the 3964R device as a DB-SEND
telegram.
Port 0 Transmit Database
Here is an example of a RK512 DB-SEND from the Modbus TCP/IP device to the
3964R Communication Partner on port 0. This example sends five words of data.
The values for the five words of data are 11, 22, 33, 44, and 55.
Word
Value
Description:
300
7
Transmit Sequence Number. Increment this value after all other data in
the message is ready. Changing this value will trigger the 3964R driver
to transmit this message to the 3964R communication partner. In this
example we are changing the value from 6 to 7 to trigger the transmit of
the send command.
301
X
Last Received Sequence number. The Modbus TCP/IP device must
copy the last received sequence number from the Receive database
(word[0]) to this location after a message has been read from the
receive database.
302
0
Reserved.
303
0
Reserved.
304
15
10 word 5 data words.
305
0x0041
DB-SEND.
306
0
Data Block.
307
0
Data Word.
308
5
Sending 5 data words.
309
0
Coordination Byte.
310
0
Data Type. 0 = Word data.
311
0
Reserved.
312
0
Reserved.
313
0
Reserved.
314
0
Reserved.
315
11
1
st
data word value.
316
22
2
nd
data word value.
317
33
3
rd
data word value.
318
44
4
th
data word value.
319
55
5
th
data word value.
