Appendix
A - 2 Pnet I/F Module 2MLL-PSRA, 2MLL-PMEA, 2MLL-PMEB User’s Guide R220
Honeywell January 2019
8) Multicast communication
Used to send the message whose operation station is not recognized to the station group whose
operation station is previously specified.
9) Token Ring
As one of the node connection methods on the network, it is a local communication network
using a token to access to communication network with physical ring structure. If the
transmission node obtains a token and its control, it transfers the message packet. Actually
realized examples are IEEE 802.5, ProNet-1080 and FDDI. The term of Token Ring is
occasionally used in substitute for IEEE 802.5.
10) Reset
It is used to initialize the communication module when Error is occurred. In SoftMaster, Select
[Online]-[Reset/Clear]-[Reset PLC] , Reset is operated. And PLC is restarted.
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