Output Interface Example (Sinking Output); Figure 2.4.11: Sinking Output Example - IMS Mforce micro drive Reference

Output Interface Example (Sinking Output)

The following circuit example shows a load connected to an I/O point that will be configured as a sinking
output.
The internal pull-up voltage
cannot provide output
current / voltage
Internal
pull-up
voltage
Sinking Output Equivalent Circuit
Code Sample
For the code sample, the load will be an LED. The I/O point will be configured such that the LED will be
unlit while the velocity is changing. Use the switch set-up from the previous input, modified to be sinking,
example to soft stop the motor.
S1=5,0,0 'set IO point 1 to be a Soft Stop input, active when LOW,
'sinking.
S1=20,0,0 'set IO point 2 to be a Velocity Changing output, active
'when LOW
SL 2000000 'enter this to slew the motor at 200000 µsteps/sec
While the motor is accelerating the LED will be dark, but will light up when the motor reaches a constant
velocity. When the Soft Stop switch is depressed the motor will begin to decelerate, the LED will go dark
again while velocity is changing.
S1=16,1,0
Output, Active HIGH, Sinking
S1=16,1,1
Output, Active LOW, Sourcing
Part 2: Connections and Interface
MForce Plus 2
IOPWR
always
off
24.9k ohms
switched
IOGND

Figure 2.4.11: Sinking Output Example

Diode recommended for
inductive loads
LOAD
IOx
+
load current, sinking
up to
24 V
Sinking Output
O1=1 (Sink OFF, Hi-Z)
O1=0 (Sink ON)
O1=1 (Sink ON)
O1=0 (Sink OFF, Hi-Z)
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