G&L MMC-A2, Hardware Manual

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MMC Ethernet TCP/IP Option Module
124 MMC Hardware Manual G & L Motion Control Inc.
Figure 6-4: Ethernet - TCP/IP LEDs
6.4 Firmware Update
See Appendix B of the PiCPro online help for firmware update information.
6.5 Theory of operation
The MMC Ethernet - TCP/IP module contains a 32-bit processor to handle
TCP/IP, PPP (future), and Ethernet protocols. It allows you to use the
Ethernet network architecture and the TCP/IP standard set of protocols to
communicate and access other modules, computers, or the Internet and its
resources. The design is based on the IEEE 802.3 specifications. The data
rate is 10 Mbps. The diagram below provides an overview.
DIAG
IN
OUT
GDLNK
IN
OUT
IN
OUT
PREV COL
Diagnostic
Ethernet receiving data (green)
Ethernet transmitting data (green)
Ethernet 10Base-T good link (green)
Ethernet collision (yellow)
Polarity reversed on 10Base-T receiver (yellow)
Com 1 receive data (green)
Com 1 transmit data (green)
Com 2 receive data (green)
Com 2 transmit data (green)
(yellow)