Delta DVP-20PM

5 Applied Instructions and Basic Usage
output pin, the Done output pin, the Aborted output pin, or the Error output pin can be set to True. If
the Execute input pin is set to True, the Busy output pin, the Done output pin, the Aborted output
pin, or the Error output pin must be set to True.
 If the input pin that a motion control function block has is the Enable input pin, the Valid output pin
and the Error output pin are mutually exclusive, and only the Valid output pin or the Error output pin
can be set to True.
 Time when output data/states are valid
 If the input pin that a motion control function block has is the Execute input pin, the Done output pin,
the Error output pin, the Aborted output pin, and data output are reset when there is a transition in
the Execute input pin’s signal from high to low, but the execution of the function block does not stop
when there is a transition in the Execute input pin’s signal from high to low. Even if the Execute
input pin in a motion control function block is reset before the execution of the motion control
function block is complete, output states will still be generated and retained for one cycle. If a
motion control function block is started again before the execution of the motion control function
block is complete, the motion control function block will not give feedback to the Done output pin
and the Aborted output pin, and an error will occur.
 If the input pin that a motion control function block has is the Enable input pin, the Valid output pin,
the Busy output pin, and the Error output pin are reset when there is a transition in the Enable input
pin’s signal from high to low.
 Characteristic of the Done output pin
The Done output pin in a motion control function block will be set to True after the motion control
function block is executed successfully.
 Characteristic of the Busy output pin
 If the input pin that a motion control function block has is the Execute input pin, the motion control
function block uses the Busy output pin to indicate that the execution of the motion control function
block is not complete, and new output states (values) are expected to be generated. The Busy
output pin is set to True when there is a transition in the Execute input pin’s signal from low to high.
When the Done output pin, the Aborted output pin, and the Error output pin are set to True, the
Busy output pin are reset.
 If the input pin that a motion control function block has is the Enable input pin, the motion control
function block uses the Busy output pin to indicate that the execution of the motion control function
block is not complete, and new output states (values) are expected to be generated. The Busy
output pin in a motion control function block is set to True when there is a transition in the Enable
input pin’s signal from low to high, and is set to True when the motion control function block is
executed. When the Busy output pin is set to True, output states (values) still change.
 Characteristic of the Aborted output pin
The Aborted output pin in a motion control function block is set to True when the execution of the
motion control function block is interrupted by a command.
 Relation between the Enable input pin and the Valid output pin
If the input pin that a motion control function block has is the Enable input pin, the motion control
function block uses the Busy output pin to indicate whether output data/states are valid. The Valid
output pin is set to True only when the Enable input pin is set to true or output data/state are valid. If an
error occurs in a motion control function block, output data/states will not be valid, and the Valid output
pin will be set to False. The Valid output pin in a motion control function block will not be reset until the
error occurring in the motion control function block is eliminated, and output data/states become valid.
DVP-20PM Application Manual
5-147