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8.0 Functionality
The Model 922-MES is a layer 2 managed Ethernet switch (MES) implemented in a fully reconfigurable
FPGA-based platform, including DDR3 memory and two microcontrollers to enable many existing and future
protocols, as well as application specific code.
The MES provides access to ten Ethernet ports capable of 10/100/1000 Mbps link speeds. Two of these ports
can be equipped with small form factor (SFP) transceivers that support Fast Ethernet (100Base-FX) and Gigabit
Ethernet (1000Base-X).
Redundancy protocols supported by the MES include MRP (via two SFP ports) and RSTP (via eight copper
ports). Additional redundancy protocols can be supported, e.g. HSR/PRP. Please contact the factory for
availability.
Ethernet ports are configured manually or through autonegotiation for 10/100/1000M operation on copper ports
and manually for 100/1000M for SFP ports. The card also provides support for advanced timing protocols, such
as IEEE 1588v2 (PTP), which is critical for synchronization in many sensor applications.
A range of subsea-qualified, pluggable, fiber-optic transceivers enables many optical topologies, including dual
fiber mode and bidirectional operation with up to 16 wavelengths on a single fiber using CWDM (Coarse
Wavelength Division Multiplexing) technology. Fiber umbilicals of up to 200 km length are supported.
The Model 922-MES GUI software (P/N 922-0408-00) provides advanced diagnostics via Modbus TCP for
real-time health monitoring of the system as well as easy configuration of all interfaces and modes of operation.
A proven RTOS (Real Time Operating System) and remote firmware upgrade feature increase system reliability
while offering an upgrade path for future protocols or application specific requirements.
8.1 Network Settings and Accessibility
8.1.1 IP Address Configuration
Each 922-MES board is assigned with three unique MAC addresses during factory configuration. The MAC
addresses are marked on the board, as shown in Figure 6-2, and recorded at the factory with cross-reference
to serial number, and thereby customer order, should it ever need to be retrieved.
There are two IP addresses (diagnostics and factory-reserved) for the MES. The diagnostics IP can be assigned
statically or dynamically using DHCP. Either mode can be enabled remotely using a virtual Telnet terminal over
any Ethernet port, followed by powering cycling the board after the changes has been submitted to the card.
The diagnostics IP address provides full diagnostics and control of the card and is served by a master
microcontroller (uC DIAG). The factory-reserved IP address is intended for future use and is normally static and
it is setup by the user on initial card configuration.
By factory default, the MES card obtains its diagnostics IP address using DHCP (i.e. dynamic IP allocation),
configured with a 5 min. timeout. If the connecting network does not support DHCP to provide a dynamic IP
within this time frame, the card will automatically revert to use its locally stored (static) IP address and network
settings. Factory default network parameters are shown in Table 4-2.
8.1.2 IP Connectivity
The MES hosts the following simultaneous IP connections:
Up to four Modbus TCP clients over any Ethernet port, including 'remotely' (i.e. from surface card)
via the optical ports. The Modbus TCP connection provides diagnostics information, which can be
accessed using Modbus software (e.g. ModScan or sample 922-MES GUI).
One Telnet over any Ethernet port, including 'remotely' via the optical ports. Typically used for initial
card configuration (e.g. redundant operation mode of and network settings), basic card diagnostics
and link status information for copper and SFP ports.
Focal Technologies Corporation
A Moog Inc. Company
Model 922-MES – User Manual
Document No. 922-0662-00, Rev 1.0
Page 8-1
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