Chapter 2 Basic Unit Specification
4. High speed input
2-25
Reading the table:
1phase 1 input counting:
X000 input: corresponding to C235 (U/D) which has no interruption reset and set function
Or corresponding to C241 (U/D) which can be interruption reset by X001 and has no
interruption set function.
Or corresponding to C244 (U/D) which can be interruption reset by X001 and interruption set
by X004.
And the rest may be deduced by analogy.
1 phase 2 inputs counting :
X000 input: corresponding to C246 (U/D) Up counting, C246 Down counting defaults to X001,
has no interruption reset and set function
Or corresponding to C249 (U/D) Up counting, C249 Down counting defaults to X001,
interruption Reset to X002 and Set to X005.
And the rest may be deduced by analogy.
2 phases 2 inputs counting:
X000 input : corresponding to C251 (A/B) A phase counting, C246 B phase counting defaults to
X001, has no interruption reset and set function
corresponding to C254 (A/B) A phase counting, C254 B phase counting defaults to X001,
interruption Reset to X002 and Set to X005.
And the rest may be deduced by analogy.
Note: With regard to high speed counting, the number of the counter should be input X000~X005
which can not be repeatedly used. As for NON-high-speed-counting, the input X000~X005,
as other input, could be the general input relay in sequential program. Furthermore, the soft
device of high speed counting, if not executing high speed counting, can also be define as
32-bit data register to saving digit.
If X000 is used in C235, it can not be used in C241, C244, C246, C247, C249, C251, C252,
C254 and interruption pointerI00
□
or M8170 pulse snapping.
