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Functional Block Diagram
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.
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:
• X0, X1, X2 and X3 can be filtered inputs or pulse inputs in Pulse Output Mode, and they are
available as input contacts to the ladder program.
• X1 behaves as an external interrupt to the pulse generator for automatic/step trapezoidal profiles. In
other profile modes, it can be used as a filtered input or pulse input just like X0 (registration mode
configuration shown above).
• 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.
DL06 Micro PLC User Manual, 3rd Edition, Rev. C
E–39
Appendix E: High-speed Input and Pulse Output Features
1
2
3
4
E
6
7
8
9
10
11
12
13
14
A
B
C
D
Output Circuit
Input Circuit
CPU
PLC
DL06
Y0
X4 - X23
Y2 - Y17
V-memory
V7633
xx30
Mode select
Y1 Preload Position Value
X1 during
Automatic/Step
Trapezoidal Profile
X0, X1, X2, X3
Y1
SP 104 Profile Complete
Y0 Start Profile
HSIO
X1 Filtered Input
(Pulse / CW) (Direction / CCW)
FILTER
PULSE GEN
Interrupt