Operator Manual
Page
20
of
40
P/N 1580281
SEC3120 Digital Transmitter
Sensor Electronics Corporation
Rev 10, 20150707
ENTER on ‘SAVE CHANGES’ to retain
the new settings
or ‘ABORT CHANGES’
to discard them.
Move cursor down to show next alarm sub menu.
ENTER on ‘MUTE ON WARN’ to change how the
transmitter acts when it goes into a warning.
Using up or down the value can be changed from
YES to NO.
ENTER on ‘PREVIOUS MENU’ to return to the
MAIN MENU
8.6.
Network ID (Sensor / Display Network Identities)
The SEC3120 may be addressed on Modbus at a specific network ID, as any other Modbus compliant
device does. However, it may also be accessed using two network device IDs, one for each sensor if it is
so configured. When communicating with the SEC3500 versions less than 4.0.0, one device ID must be
assigned sequentially for each sensor attached, allowing the SEC3500 to depict two separate sensors and
treat them as individual SEC3100 transmitters. In version 4.0.0 and higher, the SEC3500 will support a
single network ID for all sensors attached to the SEC3500 and display all relevant information as a single
transmitter, a dual-sensor hub. Likewise, Modbus compliant Master devices may choose to communicate
with the SEC3120 Transmitter using a single network ID. Switching between these modes can be very
tricky when legacy (versions older than 4.0.0) SEC3500 HMI panels are the master.
The SEC3120 Modbus Network ID Modes are:
Legacy 3100 Mode
–
This is not a mode that is selected directly by the user interface menus,
however this mode can be set by the SEC3500 HMI for communication with older legacy SEC3500
HMI Panels. It is not a mode that should be intentionally set for use with Modbus Master’s other
than legacy SEC3500 HMI Panels. In this mode, network IDs are force to be assigned sequentially
for two sensors attached to each SEC3120. Sequential IDs can be assigned in UNIQUE mode if
desired, but in Legacy 3100 mode sequential IDs are forced.
Unique Mode
–
This mode can be used for any Modbus Master or SEC3500 HMI version. In this
mode, Modbus Network IDs can be assigned to both sensors of any valid value, and do not have
to be sequential. When communicating with an SEC3500 of a version less than 4.0.0 however, the
network IDs should be set sequentially in this mode.
Single Mode
–
This mode can be used for any Modbus Master or for an SEC3500 HMI Panel
version 4.0.0 or higher. In this mode, only one Modbus Network ID is assigned to the SEC3120
Transmitter and all sensor information for all sensors attached are accessible.
Change Network ID Mode
From the Initial/Top menu screen, move the cursor down
to MAIN MENU and select ENTER.
Move the cursor down to the NETWORK Menu
and select ENTER.
MUTE ON WARN YES/NO
*
PREVIOUS MENU
* SAVE CHANGES
ABORT CHANGES
FOR SENSOR: ONE / TWO
*
LOW
MID
HIGH
*
MUTE ON WARN YES/NO
PREVIOUS MENU
EJECT MEMORY CARD
ABORT WARMUP
INFO
* MAIN MENU
CALIBRATION
ALARM
RELAY
*
NETWORK
