Do-more H2 Series PLC User Manual, 1st Edition, Rev. F - H2-DM-M
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Chapter 7: Specifications - Specialty Modules
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Each ECOM module can be assigned a Module ID ranging from 1 to 999,999,999.
Theoretically, you could have this many Ethernet modules coexisting on a single network.
Other network limitations would restrict the network size before reaching this limit. For the
majority of network PLC applications there is practically no limit to the number of ECOM
modules you can access from the NetEdit3 or Do-more Designer software. There is a node
limit for PLC-to-PLC communications. The network Read and Write instructions performed
by the initiating (master) PLC are only capable of accessing PLCs with Module IDs of 1
through 90. This effectively sets the maximum number of nodes available for PLC-to-PLC
communications at 90.
WARNING: We recommend against connecting Ethernet modules to the same network that serves as
your primary office network. While Ethernet networks can handle a very large number of data
transmissions, and normally handle them very quickly, heavy Ethernet traffic can adversely affect the
reliability and speed of the network.
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