Modbus Station Addresses And Locations - Digi Connect Sensor+ User Manual

Configure pins and protocols
4. Double-click the Digi Connect Sensor+ device you want to configure.
5. Expand the Configuration menu.
5. Select Serial: Power Output.
6. Enable the output by selecting On for Power Output Enable.
7. Select the appropriate voltage Output Level for your power output. Refer to the manufacturer
specifications for the sensor.
8. Enter the appropriate Read Delay that your sensor needs to stabilize before reading the
sensor input value. Refer to the manufacturer specifications for the sensor. For example, a
sensor may need 7 seconds to power on and stabilize before it can get an accurate reading.
Note A higher read delay keeps the device powered on longer, which reduces battery life.
9. Apply the configuration changes:
a. Click Save > Schedule. The Save Device Properties dialog appears.
b. Select Immediate.
c. Select Schedule Offline.
d. Click Schedule. Digi Connect Sensor+ downloads and applies configuration changes

Modbus station addresses and locations

In Modbus, a station address acts as a unique identifier for the external sensor device. A station
address is assigned when the external sensor device is configured and installed. Multiple stations
listen to the bus and can respond only to the commands that match their unique station address.
Digi Connect Sensor+ acts as a client to the server station addresses. All Modbus devices connected to
Digi Connect Sensor+ must have the exact same serial configuration.
In the Digi Connect Sensor+ configuration, you can specify a list of variable addresses for each station
address. The variable addresses identify the values that should be pulled from each station device.
If Connect Sensor is configured to read a variable that is unsupported by a Modbus station, no data
sample is stored.
Finding the Modbus address
A Modbus variable address includes a combination of the reading category, the logical address of the
information, and the interpretation method. Together these create a variable address that can be
added to a variable list in the Connect Sensor configuration.
Step 1: Determine the reading category
The reading category is the single digit prefix of the variable address. Each variable type has a unique
prefix.
Modbus variable type
Coil
Digi Connect Sensor+ User Guide
the next time it connects to Remote Manager.
Enable and configure the Modbus protocol
Number of bits
1
Prefix value
0
40