Sensor Electronics SEC Millenium Series Instruction And Operation Manual page 355

Figure 7: Changing the 3120 Network ID Mode
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
Then highlight the Net ID item and activate enter:
Modbus Settings Menu 1
↑ONLINE
SENSORS
* NET ID
↓485 BUS MENU
Modbus Settings Menu 2
↓PREVIOUS MENU
Using the up/down arrows, change the value to "Single" (for our example). Press
enter, and note that the asterisk to the right of the value now disappears. Scroll down to
and choose the "Previous Menu" item to exit to the Network Top Menu (which will bring
SEC 3120 16-bit Modbus Manual
For Version 1.2 and above
YES
UNIQUE
SINGLE *
Page 16 Of 46
December 2012
Sensor Electronics Corporation
P/N 1580282, Rev. 1, 20121228