Rockwell Automation 20-COMM-I Interbus Adapter - Manual (Page 70)

6-8 Using Explicit Messaging (PCP Communications)
Reading Pr. 244 [Fault 1 Time] from a PowerFlex 70 (DPI Host)
In the example ladder logic program, the user would load these
registers before calling the subroutine to perform the PCP Read:
Echo of the Command Word (PCP Read)
Message
Command word = 4 = PCP Read (bit 2 ON) N22:10 Command 4 4
SLC Address Descr
iption
Value (He
x)
N22:22
N22:13
N22:12
N22:11
N22:23
Reply
12532
2
4
-32,764
0
2
5
CR# = 2 (Station 1.0)
Sub Index not used
Number of words following = 5
CR# =2(Station 1.0)
30F4
2
4
2
5
N22:21
0
8004
Value (Dec)
N22:20
Result = 0 (success)
N22:25
N22:26
0
59
4 Number of bytes read = 4
3B235B hex = 3875675 decimal = 387.5675 hours
0
3B
4
N22:24
N22:27 9051 235B
"8000" (bit 15 ON) indicates Reply message present
Status word:
"0004" (bit 2 ON) echo's the command (PCP Read)
3001h is the start of PowerFlex 70 parameters (Pr.1)
Index =3000h+F4h = Parameter 244 [Fault 1 Time]
F4 hex = 244 dec = Parameter 244 [Fault 1Time]
Message
CR# =2 (Station 1.0) N22:0 Request 2 2
SLC Address Desc
ription
Value (He
x)
N22:1 0 0= PowerFlex 70 (DPI Host) 0
Value (Dec)
N22:3 244 F4 Parameter # = 244 [Fault 1 Time]
20COMM-UM007A-EN-P.book Page 8 Tuesday, January 22, 2002 10:52 AM