====== Moxa IO device through Modbus ======
TERRA 4D comes with a Modbus plugin which allows integration of different types of Modbus devices. Here we focus on Moxa devices.

===== Supported features: =====
  * Switch outputs on/off
  * Get events when an input is triggerd
  * Show status of inputs and outputs

===== Installation instructions: =====
=== Webbrowser: ===
  * Connect the Moxa device to Ethernet and open the browser
  * Connect to address 192.168.127.254 which is normally the default IP address of the Moxa devices
  * Main things to configure: Password, Security/Service Setting/Modbus!!!, Network/LAN, IO/Channel Mode (especially for DIOs) 
  * alternatively you can use IOxpress software 
=== Moxa IOxpress software: ===
  * Connect the Moxa device to Ethernet and install the Moxa IOxpress software (download from Moxa website)
  * Start the Moxa IOxpress and select Device/Search to find your device
  * Main things to configure: Password, Security/Service Setting/Modbus!!!, Network/LAN, IO/Channel Mode (especially for DIOs) 
  * on the Device Library page you find in the Deployment combobox the device actions, like up- and download of configuration files
  * on the Configuration Library page you can change all settings and store it to a local file 
=== TERRA 4D Configurator: ===
  * create a subsystem plugin device Modbus with default settings
  * Input:
    * create a IO device of type Modbus and select SubType "Input"
    * IP port: 502, Server address: 0, Start address: 0, Input number: 0...N 
  * Output:
    * create a IO device of type Modbus and select SubType "Output"
    * IP port: 502, Server address: 0, Start address: 0, Output number: 0...N 
  * Input register (e.g. for PWM counter):
    * create a IO device of type Modbus and select SubType "Input register"
    * IP port: 502, Server address: 0, Start address: 17, Input number: 0...N 
  * Analog Input:
    * create a IO device of type Modbus and select SubType "Analog Input"
    * IP port: 502, Server address: 0, Start address: 520, Input number: 0...N 
    * Configure low/high threshold depending on application to generate events when reading goes outside the expected range.


===== Other hints =====
  * Within the device web page, in the main menu, within User-Defined Modbus Addressing, select Analog Inputs, Digital Input/Outputs (or similar):
     * Make sure "Enable Modbus/TCP Slave Protocol" is enabled
     * Within the table all the addresses of the available data points are listed. E.g. "AI Scaling Value (Float)" at "0520" as Input Register (read-only), Reference Address "30521"
     * Within Terra4D use "Analog Input" with the address 520 (the 30000 is automatically added by selecting Analog Input).

 * [[https://store.chipkin.com/products/tools/cas-modbus-scanner|CAS Modbus Scanner]] Tool to read/check Modbus device and see the values returned by the device.