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INTRODUCTION
TO THE
SMD23/4E
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Available Discrete Inputs (continued)
Start Indexer Move Input
Indexer Moves are programmed through the Network Data like every other move. The only difference is that
Indexer Moves are not run until a Start Indexer Move Input makes a inactive-to-active state transition. This
allows an SMD23/4E to run critically timed moves that cannot be reliably started from the network due to
data transfer lags.
If the quadrature encoder is available and one of the discrete DC inputs is programmed as a Start Indexer
Move Input, then the quadrature encoder position data will be captured whenever the DC input makes a transition. An inactive-to-active state transition on the DC input will also trigger an Indexer Move if one is pending.
Emergency Stop Input
When an input is defined as an Emergency Stop, or E-Stop Input, motion will immediately stop when this
input becomes active. The driver remains enabled and power is supplied to the motor. Any type of move,
including a Jog or Registration Move, cannot begin while this input is active.
Stop Jog or Registration Move Input
When an input is configured as a Stop Jog or Registration Move Input, triggering this input during a Jog
Move or Registration Move will bring the move to a controlled stop. The controlled stop is triggered on an
inactive-to-active state change on the input. Only Jog Moves and Registration Moves can be stopped this
way, all other moves ignore this input.
If the quadrature encoder is available, the quadrature encoder position data will be captured when the DC
input makes an inactive-to-active transition if it is configured as a Stop Jog or Registration Move Input. The
encoder position data is not captured if a Jog or Registration Move is not in progress. If you want to capture
encoder position data on every transition of a DC input, configure it as a Start Indexer Move Input.
Capture Encoder Position Input
As described in the Start Indexer Move Input and Stop Jog or Registration Move Input sections above, an
SMD23/4E can be configured to capture the encoder position value on a transition of a discrete DC input.
General Purpose Input
If your application does not require all of the inputs, you can configure the unused inputs as General Purpose
Inputs. The inputs are not used by the SMD23/4E, but the input state is reported in the network data so their
state can be monitored by your host controller.
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