Figure 9: Changing 3120 485 Bus Settings - Sensor Electronics SEC Millenium Series Instruction And Operation Manual

Using the up/down controls, change the ID value to the desired value. Activate
enter. You may also change the Zone value as well. If you are not in Single Sensor Role,
you may also scroll up and change the sensor number to TWO and repeat the process if
you are choosing to set different network IDs.
Once you are done, scroll down and choose the "Previous Menu" item to exit to
the Network Top Menu. Scroll down and choose the "Previous Menu" item to exit to the
Main Menu (which will bring up the Save or Abort confirmation). Scroll down to and
choose the "Previous Menu" item to exit to the Top Menu. Scroll down to and choose the
"Exit" menu item to exit and return back to the Main Status Screen.

Figure 9: Changing 3120 485 Bus Settings

After entering the menu system, choose the Main Menu:
Top Menu 1
↑EJECT MEMORY CARD
ABORT WARMUP
INFO MENU
*↓MAIN MENU
Top Menu 2
↑SEC DIAGNOSTICS
RESET RELAYS
FORMAT FLASH CARD
↓EXIT
Then choose the Network Menu:
Main Menu 1
↑CALIBRATION
ALARM
RELAY
*↓NETWORK
Main Menu 2
↑HIDE LOW GAS
SELF TEST
SET DATE TIME
↓PREVIOUS MENU
Then choose the Modbus Settings Menu:
Network Top Menu
NETWORK ID MENU
* MODBUS SETTINGS
PREVIOUS MENU
SEC 3120 16-bit Modbus Manual
For Version 1.2 and above
Page 18 Of 46 Sensor Electronics Corporation
December 2012 P/N 1580282, Rev. 1, 20121228