Specifications

DL06 Micro PLC User Manual, 3rd Edition, Rev. C
E–69
Appendix E: High-speed Input and Pulse Output Features
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External Interrupt Timing Parameters
External interrupt signals must meet certain timing criteria to guarantee an interrupt will
result. Refer to the timing diagram below. The minimum pulse width is 0.1 ms. There must
be some delay before the next interrupt pulse arrives, such that the interrupt period cannot be
smaller than 0.5 ms.
Timed Interrupt Parameters
When the timed interrupt is selected, the HSIO generates the interrupt to ladder logic. There
is no interrupt pulse width in this case, but the interrupt period can be adjusted from 5 to
999 ms.
X
Input / Timed INT Configuration
The configurable discrete input options for High-Speed Interrupt Mode are listed in the table
below. Input X0 is the external interrupt when “0004” is in V7634. If you need a timed interrupt
instead, then V7634 contains the interrupt time period, and input X0 becomes a filtered input (uses
X1’s filter time constant by default). Inputs X0, X1, X2, and X3, can be filtered inputs, having
individual configuration registers and filter time constants, interrupt inputs or counter inputs.
If
you are only using one of the points for an interrupt, you may want to select a different main mode
(i.e. 10, 20, 30, 50, or 60); and then, just configure one of the terminals not taken as an interrupt.
For example, you might want to configure your CPU for the UP counter mode (Mode 10) and use
point 03 for a high speed interrupt. You should read the individual sections for any alternate mode
you might choose. There you will find instructions on how to select a high speed interrupt as a
secondary feature.
Time
External
Interrupt
X0
0.1 ms minimum
0.5 ms minimum
Input Configuration Register Function Hex Code Required
X0 V7634
External Interrupt 0004 (default)
Timed Interrupt xxx4, xxx = INT timebase 5 - 999 ms (BCD)
X1 V7635
Interrupt 0004 (default)
Pulse Input 0005
Filtered Input xx06 (xx = filter time) 0 - 99 ms (BCD)
X2 V7636
Interrupt 0004 (default)
Pulse Input 0005
Filtered Input xx06 (xx = filter time) 0 - 99 ms (BCD)
X3 V7637
Interrupt 0004 (default)
Pulse Input 0005
Filtered Input xx06 (xx = filter time) 0 - 99 ms (BCD)
Time
Timed
Interrupt
5 ms to 999 ms