# Devices developer_board
This page manages the devices connected to the platform and provides interface with this system.
# Side panel
The configured devices are listed on the left, with their name and a switch to control their power-on status.
The icon and the label take on color
- blue, to identify the device currently selected and displayed in the view;
- grey, to identify a device that is off (and not currently selected);
- green, to identify a device that is on (and not currently selected);
- red, to identify a device that is switched on, but which is not responding (it can be timeout or network connection interruption); in this regard, check the power on status of the device, and that the connection in the network is active with the correct IP address.
There is always a button to reorder the list of devices, labeled "Edit Order": Clicking it opens a popup in which you can drag the elements into the desired order and then save, or possibly cancel the changes.
# Add a device
Adding a new device is done by clicking on the button labeled "ADD DEVICE", which opens a modal with the following elements
- Name, the descriptive label to be assigned to the device, which must comply with the Plexus nomenclature criteria
- Device IP address, the IPv4 address configured for the device on the network.
- Device type, the type of device connected.
# Types of devices
To date, PlexusLab offers the possibility to add one or more devices among the following types
|PlexusPOD 0-10V ||POD which allows operation with elements at 0-10V|
|PlexusPOD 4-20mA ||POD which allows operation with elements at 4-20mA|
|PlexusPOD C1 ||Future version of the POD in production from Q3 2021, which allows the possibilities to switch individually the analog / digital channels operate at 0-10V or 4-20mA|
|Plexus_1 ||Old version of the POD dated 2016, being discontinued|
|Plexus_Bridge||Virtual, to connect another PlexusLab Web Server and interface with the Sections of the latter, which acts as a bridge; in the “Bridge Password” field it is necessary to enter the password to authenticate the connection to the target PlexusLab. Refer to the View and Sections part for more information, or at the System chapter for setting up a PlexusLab in "bridged" mode and setting the password|
|Mod Bus||An industrial automation systems already on the market. Modbus uses several communication protocol, to name one, PLC. The addition of a device of this type involves the insertion of additional values that indicate the ranges of registers with which to interface in reading / writing to the system that uses Modbus, in the four fields “ModBus Read Register”, “ModBus Read Interval Range”, “ModBus Write Register”, “ModBus Write Interval Range”|
# Command the status of the device
Each device has a switch next to the name, which controls its status.
When a device is turned off (gray switch) its status is Not active in the view and all values will be shown at 0.
When a device is turned on (green switch) the following conditions may occur in the view:
- State in Green with indication of the milliseconds measured as response time. In this case the device is up and running, the view shows information on the channels in real time;
- State in Timeout!, status indicating that the device is not responding, so all values will be 0 in the view. Investigate one of the possible causes of the problem, which are usually:
- misconfigured IP address
- lost connection
- worst case scenario, device failure.
# Re-ordering the devices
It is done by clicking on the "Edit Order" button at the bottom of the device list; note that the button is shown only when there are at least 2 devices configured.
When clicked, a modal window is displayed that allows you to drag the rows and, if necessary, save the new order in order to see the list with the desired structure.
The View is the portion of the screen dedicated to the detail of the currently selected device (blue icon and label in the list).
The name of the device is shown at the top, a badge which indicates its type, the IP address configured and clickable for it (to access the configuration screen inside the device itself) and finally an info button that allows you to modify the configuration that are previously set when adding the device.
# Modify a device
You can modify the device IP Address and Device Name by clicking on the info button at the top right.
# Remove a device
You can delete a device by clicking on the info butotn at the top right and click on delete.
You can read and write Plexus Lab through RESTful API. Make sure you enable API mode on System Page first.