Momentum Modbus Plus 170 PNT Series Guia do Utilizador Página 352

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Configuring an M1 with ProWORX32
352
870USE10110 July 2004
I/O Words Be sure that you have reserved enough words for I/O mapping to support your I/O
bus network. The default setting is 32 words. To estimate the number of words you
require, reserve 26 words by allowing
16 words for system overhead
10 words for module on the network (including both the local I/O and the network
I/O)
Recommendation: Allot sufficient memory to completely I/O map your network,
while preserving as much user memory as possible for your application program.
Maximum
Number of
Modules
The maximum number of modules that can be I/O mapped on the I/O bus network
depends on your processor adapter and its executive. The following table offers
guidelines.
Processor Adapter Executive Max. Modules Max. I/O Bits
171 CCS 760 00 984 128 2048
IEC 44 1408
171 CCC 760 10 984 128 2048
IEC 44 1408
171 CCC 960 20 984 256 4069
IEC 128 1408
171 CCC 960 30 984 256 4096
IEC 128 1408
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