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12–6
Communicating with a PLC-5 Processor on a DeviceNet Network using Explicit Messaging
Publication 2755-6.8
Data Table File N23 Monitor
In Data Table File N23:
•
N23:1 contains the DeviceNet status bits
•
Bit 15 is the control bit from the AdaptaScan Reader which
toggles between 0 and 1 to indicate a ‘new message being sent’
•
N23:2 is the byte count (4) of the message sent from the reader
•
N23:3 is the start of the data read 3000. Data is actually 0300.
All data is byte swapped.
1771-SDN to AdaptaScan Interface
Data Table
Processor File :MASTER.ACH
Data Table File N23
Address
Data (Radix = ASCII)
N23:0
\00\00
\80\01
\00\04
3 0
0 0
\00\00
\00\00
\00\00
\00\00
\00\00
N23:10
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
N23:20
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
N23:30
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
N23:40
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
N23:50
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
N23:60
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
N23:70
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
N23:80
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
N23:90
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
N23:100
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
N23:110
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
N23:120
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
N23:130
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
N23:140
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
N23:150
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
\00\00
Data Table File N22 Monitor
Below is a partial listing of the Data Table File N22. The table
shows N22:1 bit 7 as the DeviceNet status bit which toggles between
0 and 1 to indicate ‘send next message’.
1771-SDN to AdaptaScan Interface
Data Table
Processor File: MASTER.ACH
Data Table File N22
Address
Data (Radix=BINARY)
N22:0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
N22:1
0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0
N22:2
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
N22:3
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0