Baldor MicroFlex e100, Руководство по установке

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5-8 Input / Output MN1942
NextMove
e
100 / controller
Mint
OUTX(0)
10k
DOUT0
USR
GND
1
10
UDN2982
User
supply
24 V
User
supply
GND
USR V+
9
‘X11’
DIN1+
MicroFlex
e
100
DIN1-
‘X3’
16
6
TLP115A
10
Shield
Connect overall
shield at one end only
Figure 32 - Digital input - typical connection from a Baldor NextMove
e
100
5.2.4 Special functions on inputs DIN1 & DIN2
DIN1 and DIN2 can be configured to perform special functions.
5.2.4.1 Step (pulse) and direction inputs
Using the
MASTERSOURCE
keyword, the MicroFlex
e
100 can be configured to use DIN1 and
DIN2 as step and direction inputs:
H
DIN1 is used as the step input. The step frequency controls the speed of the motor.
H
DIN2 is used as the direction input. The state of the direction input controls the direction of
motion. An active input will result in forward motion. An inactive input will result in motion
in the opposite direction.
5.2.4.2 Fast position capture
DIN1 or DIN2 can be configured using the
LATCHTRIGGERCHANNEL
keyword to become a fast
latch input. This allows the position of the axis to be captured in real-time and read using the Mint
keyword
LATCHVALUE
. The input can configured using the
LATCHTRIGGEREDGE
keyword to be
triggered either on a rising or falling edge. Further control of position capture is provided by
various other keywords beginning with
LATCH
... . See the Mint Help file for details.
The maximum latency to read the fast position depends on the feedback device. For an
incremental encoder, the latency is approximately 150 - 300 ns. For other feedback devices
latency may be up to 62.5
μ s, resulting from the 16 kHz sampling frequency used for these types
of feedback device. The fast interrupt will be latched on a pulse width of about 30 μ s, although a
width of 100 μ s is recommended to ensure capture. To prevent subsequent inputs causing the
captured value to be overwritten, the interrupt is latched in software.
Note: The fast inputs are particularly sensitive to noise, so inputs must use shielded
twisted pair cable. Do not connect mechanical switches, relay contacts or other
sources liable to signal ‘bounce’ directly to the fast inputs. This could cause
unwanted multiple triggering.