High-Speed Input and
Pulse Output Features
3–25
High-Speed Input and Pulse Output Features
The diagram below shows HSIO functionality in Mode 30. When the lower byte of
HSIO Mode register V7633 contains a BCD “30”, the pulse output capability in the
HSIO circuit is enabled. The pulse outputs use Y0 and Y1 terminals on the output
connector. Remember that the outputs can only be DC type to operate.
Output Circuit
Input Circuit
CPU
PLC
DL05
Y0
X3- X7
Y2 - Y5
VĆmemory
V7633
xx30
Mode Select
Y1 Preload Position Value
PULSE GEN.
X2 during
Registration
Profile only
X0, X1, X2
Interrupt
Y1
SP 104 Profile Complete
Y0 Start Profile
HSIO
X1 Filtered Input
(Pulse / CW) (Direction / CCW)
FILTER
IMPORTANT NOTE: In Pulse Output Mode, Y0 and Y1 references are redefined or
are used differently in two ways. Physical references refer to terminal screws, while
logical references refer to I/O references in the ladder program. Please read the
items below to understand this very crucial point.
Notice the I/O point assignment and usage in the above diagram:
S X0 and X1 can only be filtered inputs in Pulse Output Mode, and they
are available as an input contacts to the ladder program.
S X2 behaves as an external interrupt to the pulse generator for
registration profiles. In other profile modes, it can be used as a filtered
input just like X1 (registration mode configuration shown above).
S References “Y0” and “Y1” are used in two different ways. At the discrete
output connector, Y0 and Y1 terminals deliver the pulses to the motion
system. The ladder program uses logical references Y0 and Y1 to
initiate “Start Profile” and “Load Position Value” HSIO functions in Mode
30.
Hopefully, the above discussion will explain why some I/O reference names have
dual meanings in Pulse Output Mode. Please read the remainder of this section
with care, to avoid confusion about which actual I/O function is being discussed.
Functional Block
Diagram
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