System Features; Remote Firmware Upgrade; Saving User Switch Configuration; Dhcp Enable/Disable - Focal 922-MES User Manual

8.4 System Features

The 922-MES has several special system features to support subsea applications:

Robust remote firmware upgrade with permanent factory code backup

Saving user switch configurations

DHCP enabled/disabled with timeouts

Software reset

Watchdog reset

Automatic user switch configuration loading

Configurable UDP heartbeat with critical card status

Multiple Modbus clients

Validation of IP configuration changes

8.4.1 Remote Firmware Upgrade

The 922-MES card allows users to update the application firmware for the diagnostics microcontroller (uC DIAG)
over a TCP/IP interface using a proprietary protocol with multiple verification stages. Focal provides the
necessary software and instructions for performing infield firmware upgrades.
After the Firmware update of the uC DIAG is completed, the card will automatically reset several times
before finalizing the update. In case of a failure during a firmware update, the card will automatically
load the factory default application firmware.
Future firmware updates to the diagnostics microcontroller enable the possibility of upgrading and adding special
features to the FPGA-based MES Ethernet switch core to meet future market and customer needs using the
same hardware platform.

8.4.2 Saving User Switch Configuration

The card allows the users to load and save Ethernet switch configurations from/into an EEPROM.
The current Ethernet switch configuration can be saved to the EEPROM via a Telnet and/or Modbus TCP/IP
interface. The user can also revert back to the factory default Ethernet switch settings using the Telnet interface.

8.4.3 DHCP Enable/Disable

The 922-MES diagnostics microcontroller (uC DIAG) can obtain its IP address by using the Dynamic Host
Configuration Protocol (DHCP). This feature can be enabled or disabled through the Telnet interface.
If this feature is enabled, then on power up the card sends a DHCP query and waits up to the duration of the
DHCP timeout for a valid response. On receipt of a valid response from a DHCP server, the address specified
by the DHCP response is used as the IP address.
If the card fails to receive a valid DHCP response within the configured timeout period, then the static IP address
saved in the EEPROM is used as the IP address. If the EEPROM access were to fail, the card uses the address
192.168.0.100 as its IP address. Note that by default the DHCP functionality is enabled and the DHCP
timeout is 5 minutes (for cards w/ uC DIAG FW 0xA4).
DHCP is enabled by sending one of the following commands through the Telnet interface, "dhcp on short"
or "dhcp on long" or "dhcp on [time in min from 1 to 10]". These commands will enable DHCP
with a timeout of 1 min, 5 min or 1-10 min respectively. DHCP is disabled by sending "dhcp off".
Note: Cards with older uC DIAG FW (i.e. <0xA4) P/N 922-1008-01 have DHCP enabled by default with a timeout
of 1 minute and do not support the user-defined timeout range of 1 to 10 min. The only options available in the
older FW versions are 1 or 2 minutes or off.
Focal Technologies Corporation
A Moog Inc. Company
Model 922-MES – User Manual
Document No. 922-0662-00, Rev 1.0
Page 8-5