Modbus

The Modbus task allows you to create networks, devices and data points as well as gateways for Modbus.

More information can be found in the Modbus expert documentation A6V16039086 on SID.

1	Task selector	2	Plants navigation view
3	Toolbar	4	Modbus area
5	Library and Properties

① Task selector

Task	Description
I/O configuration	I/O configuration
Modbus	Modbus
M-bus	M-bus
KNX PL-Link	KNX PL-Link
BACnet references	BACnet references
BACnet objects	BACnet objects
Programming	Programming

② Plants navigation view

The Plants navigation view shows the hierarchy of devices in the plant. Select and right-click the plant to display the context menu commands.

Context menu command	Description
	Open/close folder structure.
	Hide/unhide plant information.
Filter	Enter letters to reduce the object view.
Add plant	Opens the Add plant window for creating a new plant.
Add folder	Opens the Add folder window for creating a new folder.
Delete	Deletes the selected element.
Duplicate	Creates a copy of the selected element.
Rename	Opens the Rename… window for entering a different name for the selected element.
Show in program	Opens the selected element in the Programming editor.
Open properties	Opens the Properties of the selected element.

③Toolbar

Command	Description
State	Indicates the state of the application. The green color indicates that the application is online and running or paused. Gray: Engineering session not active, Not connected Green: Application running Orange: Download required Red: Download in progress, Backup in progress or Busy
Check	Checks for duplicate names, number of I/Os, trend limits, etc. The check is automatically performed before loading a device. Showing data point limits when compiling
(Play)	Only visible when the device is online. Activates an online session and loads changes for the selected device. Using play/pause function
(Pause)	Only visible when the device is online and an online, session is started. Deactivates an active online session.
 (Alarming)	Temporarily suppresses all alarms for testing purposes. Suppressing alarms during commissioning or maintenance Note: If several alarms are triggered due to a field device status is “Device-Missing” (perform an alarm shower), only the “Device-Missing” alarm is sent to the corresponding recipients. This ensures that the user does not receive and have to acknowledge multiple alarms.

④ Modbus area

In the Modbus area, there is a network tree to navigate through the elements of the Modbus network. There is also a separate toolbar, and the Workplace table.

Command	Description
Add network	Opens the Add network window where you can create a new network.
Add device	Opens the Add device window where you can create a new device.
Add data point	Opens the Add data point window where you can create a new data point.

The Workplace table provides an overview of the Modbus network. Click an item in the network tree to view the properties its properties. There are different columns depending on your selection.

Column	Description
Name	The name of the element. Editable text field.
Description	The description of the element. Editable text field.
Status	The status of the selected network.
Unit	The type of unit.
Type	The type of object.
Data type	The type of data.
Function code	The corresponding function code of the data point.
Address	The port address within the Modbus network. Editable numeric field.
 (Alarming)	Select to activate the alarming function for the object. In the filter field, select True to filter for objects with activated alarming function.
 (Trending)	Select to activate the trending function for the object. In the filter field, select True to filter for objects with activated trending function.
Assign bulk	Bulk object filter. Select a bulk object from the list to show only the matching bulk reader objects. Optimizing the network traffic
Parameters	The calculated value from multiple properties.
Extension	Drop-down list, typically for RTU network there is only one extension.

⑤ Library and Properties

The Library and Properties area on the right can be toggled. The Library view contains elements which can be dragged directly to the working area.
Library

The Property view shows the properties of the selected element. The items displayed in the Property view depend on the selected object type.

Help

The More symbol always opens the English documentation in the HIT portal "https://hit.sbt.siemens.com/". It is expected that user change the desired language\region on HIT portal to see the help in the desired language.

Context menu

Command	Description
Add data point	Opens the Add data point window where you can create a new data point.
Delete	Deletes the selected object.
Rename	Opens the Rename device window where you can change the name and description of the selected object.
Duplicate	Creates a copy of the selected object.
Start tracing	Only available when online. Opens the Traces –Network view window where you can view transmitted and received Modbus telegrams with date and time stamp. Note: The Modbus tracing is not available through MS/TP devices. It is available for MS/TP devices when connected via the WLAN since we have no bandwidth restriction there.
Stop tracing	Only available when Modbus tracing is enabled. Disables the Modbus network tracing.
Optimize network traffic	Applies a bulk reader which reduces the number of requests on the network with the result of reducing the network load.
Shift data point addresses	The address range can be changed by the entered offset for the entire automation station.
Show objects from bulk read	Applies the Assign bulk filter for the selected bulk reader. A bulk reader object has to be selected.
Show in plant	Opens the selected object in the plant view.
Show in program	Opens the Programming editor.
Open properties	Opens the properties of the selected object.