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2.10 Advanced

Feedback loop

Block diagram — Feedback loop

This block can be used to create logical loops in the logic diagram. See 1.7.19 Logical loops for more information about loops.

Unsafe & Safe

Block diagram — Unsafe & Safe

This block can be used if there is an unsafe signal that the programmer wants to be able to turn off a safety output, or a condition to accept a station to go to ON. The output is a logical AND function between the inputs.

Warning

It is crucial that all safety equipment and signals are connected through the "Safe" input and not the "Unsafe" input. The "Unsafe" input is only supposed to take an extra unsafe signal that can turn on or off the output if the "Safe" input is high.

Notice

Safety calculations cannot be made for applications where this block is used. It is completely up to the system designer to manually perform the necessary calculations for applications using this block.

Inputs

  • safe — the safe part of the application must be connected to this input.
  • unsafe — the unsafe signal that should turn the output off or allow the output on.

Outputs

  • output — 1 when both inputs are 1.

Properties: None.

Fatal Error

Block diagram — Fatal Error

This block can be used to trigger the unit to enter fatal error (safe state) when the input signal is 1 (HIGH). The specified error code is displayed on LED 1–8 on the LED display. LED 15 and 16 light up to indicate that a user error has been triggered from logic. LED 9–13 are switched off.

Inputs

  • Trigger — when a logic 1 (HIGH) signal is received on this input, the unit will enter the fatal ERROR-state (safe state), turning off all outputs and displaying the specified error code on the LED display.

Outputs: None.

Properties

  • Name — the name of this block.
  • Message — message to display when entering this fatal error.
  • Error ID — the error code that should be displayed as binary on the LED display.

CAN OK

Block diagram — CAN OK

This block outputs a 1 (HIGH) signal when the node has a direct CAN connection to the selected other node number.

Inputs: None.

Outputs

  • Outputs a 1 (HIGH) signal if the node has a direct CAN connection to the selected node.

Properties

  • Name — changes the name of this block.
  • To Node Number — the node to check the CAN connection to.

Block diagram — Link OK

This block outputs a 1 (HIGH) signal when the node has a radio OR CAN connection to the selected other node number.

Inputs: None.

Outputs

  • Outputs a 1 (HIGH) signal if the node has a radio OR CAN connection to the selected node.

Properties

  • Name — changes the name of this block.
  • Use short timeout — select to use the short timeout specified in the project settings.
  • To Node Number — the node to check the link to.

Block diagram — Link All

Shows the link status of all nodes in the system. Links for nodes that do not exist in the system always output 0.

Inputs: None.

Outputs

  • 1–16 — outputs a 1 (HIGH) signal if the node has a radio OR CAN connection to the selected node.