Baldor Nextmove ESB, Installation Manual

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Input / Output 4-9 MN1924
4.3.1.4 Auxiliary encoder inputs - DIN17 (STEP), DIN18 (DIR), DIN19 (Z)
DIN17-DIN19 may also be used as an auxiliary encoder input. DIN17 accepts step (pulse)
signals and DIN18 accepts direction signals, allowing an external source to provide the
reference for the speed and direction of an axis. The step frequency (20MHz maximum)
determines the speed, and the direction input determines the direction of motion. Both the
rising and falling edges of the signal on DIN17 cause an internal counter to be changed. If 5V
is applied to DIN18 (or it is left unconnected) the counter will increment. If DIN18 is grounded
the counter will be decremented.
Typically, one channel of an encoder signal (either A or B) would be used to provide the step
signal on DIN17, allowing the input to be used as an auxiliary (master) encoder input. The
input can be used as a master position reference for cam, fly and follow move types. For this,
the
MASTERSOURCE keyword must be used to configure the step input as a master (auxiliary)
encoder input. The master position reference can then be read using the
AUXENCODER
keyword.
Since a secondary encoder channel is not used, DIN18 allows the direction of motion to be
determined. The Z signal on DIN19 can be supplied from the encoder’s index signal, and may
be read using the
AUXENCODERZLATCH
keyword.
See the MintMT help file for details of each keyword.
4.3.1.5 Digital inputs - reset
The reset input !RSTIN is available on connector X4, and uses CREF1 as its common
connection. When the reset input is activated it will cause a hardware reset of the NextMove
ESB. This is equivalent to power-cycling the NextMove ESB. Due to the internal pull-up
resistor, the reset input may be left floating.
!RSTIN
3k3
TLP280
DGND
Reset
4k7
Vcc
NextMove ESB
CREF1
7
9
Shield
12
X3
‘X4’
Figure 11 - Reset input