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4-6 Input / Output
MN1902
4.3.2 CREF and digital inputs
Pin 7 (CREF) controls the sense of all the digital inputs (X3 pins 9 to 17) and should be
permanently wired, dependent on the user requirements:
Active high
: connect 0V to pin 7.
The digital inputs will be active when a voltage of +24VDC (greater than 12VDC) is applied to
them and will sink a current of approximately 5mA each.
Active low
: c24VDC to pin7.
The digital inputs will be active when grounded (less than 2V) and will source a current of
approximately 5mA each.
The +24VDC supply is from a customer supplied 24VDC supply that should have a continuous
current capability of 1.75A.
The sense of the inputs can be configured in Mint WorkBench or controlled individually in Mint
using the keyword
INPUTACTIVELEVEL
.
See section 3.8 for more information about Drive Enable.
4.3.3 Special functions on DIN4 and DIN5 - pulse and direction inputs
DIN4 and DIN5 can be configured using the
MASTERSOURCE
keyword to behave as pulse
and direction inputs:
H
DIN4 is used as the pulse input. The pulse frequency controls the speed of the motor.
H
DIN5 is used as the direction input. The state of the direction input controls the direction of
motion. A positive voltage will result in forward motion. If DIN5 is grounded, movement will
be in the opposite direction.
Note:
If DIN4 and DIN5 have been configured as pulse and direction inputs, the
alternative pulse and direction inputs, available on connector X9, cannot be used.
See the Mint keyword
MASTERSOURCE
.
Active high:
DIN
x
=+24VDC (±20%)
CREF
=0V
4k7
33pF
HCPL2231
to CPU
Vcc
FlexDrive
II
Active low:
DIN
x
=0V
CREF
=+24VDC (±20%)
1k
10k
DGND
DIN4
CREF
14
7
‘X3’
Figure 28 - X3 pulse and direction / fast digital input circuit
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