Digi Connect Sensor User Manual page 41

Configure sensor and report settings
The Modbus protocol allows Connect Sensor to collect remote diagnostic information from a Modbus-
enabled sensor as well as alert a user remotely if the sensor malfunctions. You can configure Connect
Sensor to collect remote diagnostic information from up to four Modbus-enabled sensors.
The Modbus protocol uses the serial pins on the I/O terminal block in Connect Sensor. The
configuration settings specified in the Modbus Protocol Settings page in Remote Manager must
exactly match the Modbus protocol settings on the external sensor device(s). The configuration
includes a list of variables, which specify the locations on the Modbus device that the Connect Sensor
should read to collect diagnostic information.
You can also choose to enable the Modbus protocol alarm option. This ensures that when an error
occurs with the Modbus-enabled sensor, error information is pushed to Remote Manager without
waiting for the next scheduled push.
You can review diagnostic information from the Modbus-enabled sensor in the Data Services tab in
Remote Manager. For more information about reviewing Modbus information in the data stream, see
Modbus (modb1) data stream
1. Sign in to Remote
2. Click Device Management > Devices tab.
3. Double-click the Connect Sensor device you want to configure.
4. Expand the Configuration menu.
5. Click Modbus Protocol Settings.
6. For the Protocol Enable (ena) field, select the On option.
7. Determine whether error information should be pushed immediately. For the Device Status
Alarm Mask (aem) option:
Select the On option if error information should be pushed immediately.
n
Select the Off option if error information should be pushed with the next scheduled
n
push.
8. The following settings must match the configuration of the external sensor device. Select the
appropriate option from the list box.
Serial framing mode (mode)
n
Serial baud rate (baud)
n
Serial data bits (dbt)
n
Serial stop bits (sbt)
n
Serial parity (par)
n
9. For each Modbus sensor that you want to monitor, you can specify the station address and
then include a list of variable addresses. The items in the list must be separated by a comma
without spaces. The list is limited to 63 characters, which allows for 8 to 10 variables in a list.
For more information about identifying Modbus stations and locations, see
addresses and
a. In the Station1: Slave Address (saddr1) field, select the station address.
b. In the Station 1: Variable list (vars1) field, enter the list of variable addresses.
c. Repeat this process for any additional stations. You can specify up to four stations.
Digi Connect® Sensor User Guide
definitions.
Manager.
locations.
Enable and configure the Modbus protocol
Modbus station
41