GE GEFanuc Automation Programmable Control Products TCP/IP Ethernet Communications for the Series 90t-70 PLC GFK-1004B - Manual (Page 78)

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3-26 TCP/IP Ethernet Communications User’s Manual – January 1996 GFK-1004B
Up to 8 Receive data Group Addresses may be programmed for frame reception.
Multicast receive frames are accepted if they match one of these Group Addresses.
ADDRESS - One of 8 Group Addresses used for reception of multicast frames. A 6-byte
hexadecimal byte string which represents a valid multicast address. Individual sta-
tion addresses, or the broadcast address <<FFFFFFFFFFFF>> are not permitted.
Entry 0 defaults to <<09002B000004>>,which is the All-ES MAC address; all other
entries default to zero<<000000000000>> to indicate that the entry is not used.
Corresponds to Station Manager Parameter lgrpmsk0 - lgrpmsk7.