Chapter
5
Publication 1794-6.5.16 – September 1998
How Communication Takes
Place and I/O Image Table
Mapping with the DeviceNet
Adapter
In this chapter, we tell you about:
For information on
See page
About DeviceNetManager Software . . . . . . . . . . . . . . . . . . . . . . 5–1
Polled I/O Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
Adapter Input Status Word . . . . . . . . . . . . . . . . . . . . . . . . . . 5–2
System Throughput . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–3
Mapping Data into the Image Table . . . . . . . . . . . . . . . . . . . . . . . 5–3
Pulse Counter Module (1794-ID2) Image Table Mapping . . . . . . . 5–3
Pulse Counter Bit/Word Assignments . . . . . . . . . . . . . . . . . . . . . 5–4
Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–7
DeviceNetManager software is a tool used to configure your FLEX
I/O DeviceNet adapter and its related modules. This software tool
can be connected to the adapter via the DeviceNet network.
You must understand how DeviceNetManager software works in
order to add a device to the network. Refer to the DeviceNetManager
Software User Manual, publication 1787-6.5.3.
Output data is received by the adapter in the order of the installed
I/O modules. The Output data for Slot 0 is received first, followed
by the Output data for Slot 1, and so on up to slot 7.
The first word of input data sent by the adapter is the Adapter Status
Word. This is followed by the input data from each slot, in the order
of the installed I/O modules. The Input data from Slot 0 is first after
the status word, followed by Input data from Slot 2, and so on up to
slot 7.
Adapter Status
Slot 0 Input Data
Slot 1 Input Data
Slot 7 Input Data
Slot 0 Output Data
Slot 1 Output Data
Slot 7 Output Data
Read Data
Write Data
Network READ
Network WRITE
DeviceNet Adapter
Slot 0
I/O Module
Read
Write
Slot 1
I/O Module
Slot 7
I/O Module
...
...
...
...
...
More
What This Chapter
Contains
About DeviceNetManager
Software
Polled I/O Structure
Allen-Bradley HMIs