Allen-Bradley PowerFlex 20-COMM-P FRN 1 Series User Manual page 84

6-14 Using Explicit Messaging (Parameter Protocol)
Figure 6.6 Example SLC Ladder Logic - Station 2 Parameter Protocol (Continued)
N10:24 is the Station 2 Response Parameter Access Word 1. It is < > 0 when a message has been received in response to a
message request. If the response is >= 7000 hex (28672 decimal), then the adapter is responding that an error has occurred. In
this case, the returned data in the response will contain a fault code and not parameter value data.
The response message can be found at:
N7:40 = PCA word = contains the RC and PNU
N7:41 = Subindex = the DPI port # ("0"= Host or PowerFlex drive, "5" = 20-COMM-P, etc.)
N7:42 = PVA #1 = the parameter value (high word)
N7:43 = PVA #2 = the parameter value (low word)
The PVA's will either contain parameter read data, echo the parameter write data, or contain an error code if unsuccessful.
0017
0018
Station 2
Par Prot Station 2
Messaging RESPONSE
Request PCA Word
B3:19 NEQ
Not Equal
0 Source A
Source B
N10:24
0<
0
0<
RESPONSE Message
PCA Word
COP COP
Copy File
Source #N10:24
Dest #N7:40
Length 4
Station 2
PCA Word
MOV MOV
Move
Source 0
0<
Dest N20:24
0<
Station 2
Par Prot
Messaging
Request
B3:19
U
0
END