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Line Drive/Press Feed - RG354172

Description

This block computes the speed Setpoint for a press infeed or outfeed section.  It has a single output.

The output is calculated from Line Speed and Diameter trimmed by a PID loop.  The block has provision for a section Jog input and incorporates a ramp to limit the rate of change of line speed.

Please refer to the SignalP/PID function block data sheet for information on the PID function within this block.

Although all of the inputs may be connected to other function blocks in the system, a new output is computed only when the Feedback input receives a message.  Furthermore, the Feedback input should receive messages on a regular basis (the block is designed to tolerate timing jitter but should not be left without a Feedback input for long periods).

The line speed ramp is implemented by limiting the output change by the Ramp Delta parameter each time the function block is invoked.  Hence, the true ramp time is a function of the invocation rate:

ramp time = invocation rate / Ramp Delta

Parameters

Line Speed	Line Speed input to the block.  Expects a value (-100% to +100%).

Trim	Trim input to the block.  Expects a value (-100% to +100%).

Calibration	Calibration input to the block.  Expects a value (-100% to +100%).

Diameter	Diameter input to the block. Expects a value (-100% to +100%).

Ramp Delta	Sets the ramp delta limit. Expects a value (0% to 100%).

Jog Speed	Sets the jog speed. Expects a value (-100% to +100%).

Start	Controls the start switch.  Expects Disable (false) or Enable (true).

Jog	Controls the jog switch.  Expects Disable (false) or Enable (true).

Output Min Clamp	Output Minimum Clamp input to the block.  Expects a value (-100% to +100%).

Get Output	Returns the current value of the output:  -100% to +100%.

Get Trim	Returns the current value of the trim:  -100% to +100%.

Get Calibration	Returns the current value of the calibration:  -100% to +100%.

Get Diameter	Returns the current value of the diameter:  -100% to +100%.

Get Ramp Delta	Returns the current value of the ramp delta:  -100% to +100%.

Get Ramp Input	Returns the current value of the ramp input:  -100% to +100%.

Get Ramp Output	Returns the current value of the ramp output:  -100% to +100%.

Get Line Speed	Returns the current value of the line speed:  -100% to +100%.

Get Jog Speed	Returns the current value of the jog speed:  -100% to +100%.

Get Jog	Returns the current state the jog switch:  Disabled (false) or Enabled (true).

Get Start	Returns the current state the start switch:  Disabled (false) or Enabled (true).

Get Output Min Clamp	Returns the current value of Output Minimum Clamp:  -100% to +100%.


Description

This block computes the speed Setpoint for a press infeed or outfeed section.  It has a single output.

The output is calculated from Line Speed and Diameter trimmed by a PID loop.  The block has provision for a section Jog input and incorporates a ramp to limit the rate of change of line speed.

Please refer to the SignalP/PID function block data sheet for information on the PID function within this block.

Although all of the inputs may be connected to other function blocks in the system, a new output is computed only when the Feedback input receives a message.  Furthermore, the Feedback input should receive messages on a regular basis (the block is designed to tolerate timing jitter but should not be left without a Feedback input for long periods).

The line speed ramp is implemented by limiting the output change by the Ramp Delta parameter each time the function block is invoked.  Hence, the true ramp time is a function of the invocation rate:

ramp time = invocation rate / Ramp Delta


Parameters

Line Speed	Line Speed input to the block.  Expects a value (-100% to +100%).

Trim	Trim input to the block.  Expects a value (-100% to +100%).

Calibration	Calibration input to the block.  Expects a value (-100% to +100%).

Diameter	Diameter input to the block. Expects a value (-100% to +100%).

Ramp Delta	Sets the ramp delta limit. Expects a value (0% to 100%).

Jog Speed	Sets the jog speed. Expects a value (-100% to +100%).

Start	Controls the start switch.  Expects Disable (false) or Enable (true).

Jog	Controls the jog switch.  Expects Disable (false) or Enable (true).

Output Min Clamp	Output Minimum Clamp input to the block.  Expects a value (-100% to +100%).

Get Output	Returns the current value of the output:  -100% to +100%.

Get Trim	Returns the current value of the trim:  -100% to +100%.

Get Calibration	Returns the current value of the calibration:  -100% to +100%.

Get Diameter	Returns the current value of the diameter:  -100% to +100%.

Get Ramp Delta	Returns the current value of the ramp delta:  -100% to +100%.

Get Ramp Input	Returns the current value of the ramp input:  -100% to +100%.

Get Ramp Output	Returns the current value of the ramp output:  -100% to +100%.

Get Line Speed	Returns the current value of the line speed:  -100% to +100%.

Get Jog Speed	Returns the current value of the jog speed:  -100% to +100%.

Get Jog	Returns the current state the jog switch:  Disabled (false) or Enabled (true).

Get Start	Returns the current state the start switch:  Disabled (false) or Enabled (true).

Get Output Min Clamp	Returns the current value of Output Minimum Clamp:  -100% to +100%.