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I/O Mapping an I/OBus Network with Concept
338
870 USE 101 00 V.3
Supporting an I/O Map for an I/OBus Network
Introduction Three Processor Adapters have an I/OBus communication port that enables them
to control and communicate with other network slave I/O:
l 171 CCS 760 00
l 171 CCC 760 10
l 171 CCC 960 20
If you are using I/OBus to control network I/O, you need to write an I/O Map in your
configuration. This section describes the configuration parameters required to
support an I/O Map for I/OBus.
I/O Map
Reserved Words
Be sure that you have reserved enough words for I/O mapping to support your I/O
Bus network. The default setting is 144 words. To estimate the number of words
you require, allow:
l 16 words for overhead
l 10 words/module on the network (including both the local and the network I/O)
Allot sufficient memory to completely I/O Map your network, while preserving as
much user memory as possible for your application program.
Number of
Segments
Be sure that the number of segments is set to 2. If you have changed this setting to
1, you will not be able to support an I/OBus network.
Next Step Once you are sure that your Configuration Overview parameters are set properly,
you can access an I/O Map screen for an I/OBus network.