Rockwell Automation 20-COMM-P Profibus Adapter - Manual (Page 78)

6-8 Using Explicit Messaging (Parameter Protocol)
Reading Par. 244 [Fault 1 Time] from the PowerFlex 70 (DPI Port 0)
Note 1: 1B518E hex = 1790350 decimal which equates to 170.0350
hours (fixed decimal point.)
Write Examples
Figure 6.4 Overview Parameter Message Format (Write Request)
Bit 15-12 11 10-0 15-12 11 10-0
Parameter
Access
Word 1
(PCA) RC SPM PNU RC SPM PNU
Parameter
Access
Word 2
(IND) Subindex Subindex
Parameter
Access
Word 3
(PVA) Parameter value high
(32 bit high word)
Parameter value high
(32 bit high word)
Parameter
Access
Word 4
(PVA) Parameter value low
(32-bit low word/
or 8-bit/16-bit value)
Parameter value low
(32-bit low word/
or 8-bit/16-bit value)
Confirms Par. Access Word 2 of the request
(DPI Port #)
Message
1000 hex = Read
N20:10 Command 1
Par
. Access
Wo
rd
SLC Address Descr
iption
Value (he
x)
N10:12
N20:13
N20:12
N20:11
N10:10
N10:13
Reply
3
2
2
1
4
4
3
DPI Port 0 (DPI Host)
Not Used
Not Used
Confirms Par. Number of the request ("F4")
Transferring 16-bit parameter value ("1")
Parameter value high word*1
F4 hex = 244 dec (Pr. 244)
0
0
0
518E
1B
N10:11
0
Parameter value low word*1
*Note 1: 1B518E hex = 1,790,350 decimal equates to 179.0350
hours (fixed decimal point)
10F4
10F4
Request
Response
20COMM-UM006A-EN-P.book Page 8 Friday, September 28, 2001 10:43 AM