IHC Dredging Output - Position and Triangles

Two output drivers are described here.

The first (Network - IHC Dredging Positions), while specific to an IHC PLC, is just used as a demonstration of any output driver, all of which have a single page of parameters to define.
The second driver (Network - IHC Dredging Triangles) is a special output to an IHC PLC.

Network - IHC Dredging Positions (UDP)

Add a new system by selecting “Edit” from the menu bar, and then “New” and “System”, or right click on the item System in the item tree.

The following dialog opens.

Enter an appropriate name that provides instant recognition in Online displays.

Select Output System from the drop down list.

From the drop down list select the driver that corresponds to the data message a third party system can decode.

Enter interface port parameters. This driver happens to be network based. Others are serial based.

Please refer to A Note on Interfacing Parameters.

Enter the data update parameters.

Updates

Maximum update rate

Enter a value to determine how often data will be decoded by the interface driver. Some equipment is capable of outputting data at high output rates, but it may not be necessary to use each update. A sensor system may for example output values hundreds of times per second, where five times per second is sufficient. In this case, enter a value of 0.20s. Any data not decoded by the driver is lost and cannot be recovered later.

Data

Some output drivers can make use of the Redundancy functionality (refer to Redundancy Monitor system in the Drivers & Interfacing Manual). If so this option is shown on the first page of the setup wizard.

The option can be Enabled/Disabled or set to Redundancy. This setting can also still be changed online.

- Enabled: data will always be outputted on this computer
- Disabled: data will not be outputted on this computer
- Redundancy based: data will be outputted by the primary computer

The purpose of the Redundancy Monitor System driver is to perform an election process which decides which QINSy system is the primary system for data output.
Each output system can be configured to enable/disable its output based on redundancy. Output drivers that have been configured as such will only output data if they are on the system that is 'Master'.

Click Finish to complete the definition.

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Network - IHC Dredging Triangles (TCP)

This driver outputs a number of TIN triangles from the currently selected dredging design surface. A request for a number of TIN triangles is made by the IHC dredging computer via a TCP/IP connection. The driver fetches the triangles from the design (manual, DTM/pro or Grid) and sends them to the IHC computer. The driver will select the triangles which are located in an area around the last node position.

When a Manual design is used the driver will send two triangles that represent an area of 500x500 survey units around the node position.
When DTM/pro file is selected the actual triangles as defined by the user in TerraModel are retrieved from the file.
When Grid file is used as input then the grid points are triangulated inside the driver and sent to the IHC computer.

Optional Session Setup-Dredging-Clipping Depth is not applied to the triangles.

The set up of this driver is identical to the driver described above except that the driver selection is different.

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Return to: TSHD - Output of Raw and Result Data