JPS6350116A - Multi-output timer of multi-output counter - Google Patents

Abstract

PURPOSE:To decrease the number of timers, and also, to decrease an installation area of the timer, and to execute easily an operation, as well, by comparing the time before the timing completion time in each time after the timing has been started, and outputting a signal when it has coincided. CONSTITUTION:By providing the second setting device for setting the time or the number before an original by setting the timing completion time or the number as the origin, a signal is generated at the time having reached the time or the number which has subtracted the time or the number which has been set by the second setting device, from the timing completion time or the number. In this way, by generating the signal before the completion by on piece of timer, the cost is reduced, a space of a device for using said timer is made small, and also, it can be set easily.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to a timer or counter (hereinafter referred to as a timer), and particularly to a timer that emits a signal just before the timing is completed.

[Prior Art] A conventional timer has one setter for setting a timing completion time, starts timing by an external signal, and emits a signal when the set time is reached.

For this reason, if a signal is required at the second, third,... nth time before the completion of the timing based on the above-mentioned timing completion time, the second, third,... nth timers are required. For example, when up to the third signal was required, three timers were used. Therefore, since three timers are used, the cost becomes high and the space of the device using the timers becomes large. Also, the completion time is set to time A from the timing start,
Assuming that the second signal B is at a time 8 hours before time A, and the third signal C is at a time C hours before time A,
It was necessary to calculate and set the times for A-B and A-C for the second and third timers, which was time-consuming.

[Object of the invention] The present invention eliminates such drawbacks, and its object is to:
By emitting a signal just before completion using one timer,
It is an object of the present invention to provide a multi-output timer which is low in cost, requires a small space for a device using it, and can be easily set.

[Summary of the Invention] The multi-output timer of the present invention has a setting device for setting the timing completion time or number, and starts timing by an external signal and issues a signal when the set value is reached. By having a second setter that sets a previous time or number based on the time or number, the time or number that is obtained by subtracting the time or number set by the second setter from the timing completion time or number is reached. It is characterized by the fact that it emits a signal at certain times.

[Embodiments of the Invention] Figure 0, which will now be described with reference to figures showing one embodiment of the present invention, shows a timer in which the number n of setters for issuing a signal before the completion signal is 4. Reference numeral 11 indicates that the timing has started by an external signal, and 12 is a pulse oscillator that emits a pulse, that is, a timing T, every moment the timing starts.

13 to 16 and 18 are comparators, respectively, and the comparator 13
The completion time setter 19 is A time after the timing start, and χ is the nth time from the completion time and χ time before.
Since the setting device 20 is connected, the A time and χ time are set. A time is set in the comparator 14, and the D setting device 21 which is third from the completion time and before 0 hours is connected, so that the A time and 0
The time is set.

A time is set in the comparator 15, and the A time and C time are set by connecting the "C setting" JA22 which is the second from the completion time and before the C time.Comparator 16 has A time set, and
The A time and 8 hours are set because the B setting device that is the first and 8 hours before the completion time is connected. Only time A is set in the comparator 18.

Next, the operation of the embodiment described above will be explained. When timing is started by an external signal, timing T is generated by pulse generator 12. Comparator 1 receiving this signal
3, when the logical expression T≧A−χ is calculated and the result is positive, the signal is sent to the comparators 14 to 16 and 18, but since D and B in these logical expressions are all smaller than χ, the comparator Since all the results from 14 to 16 are negative, and furthermore, the comparator 18 is also positive, the signal passes through the timing T and returns to the comparator 13 again. As time elapses in this manner, T=A-χ, the result becomes Yes, and 31 is output as the n-th signal. At this time, the timer outputs the signal farthest from the completion time, that is, the signal after the shortest time from the timing start, among the plurality of signals generated before the completion time.

After the signal 31 is output, the signal from the pulse generator 12 is
The signal directly passes through the comparator 13 and reaches the comparator 14, where the logical expression T≧A−D is calculated. When the calculation result is positive, the process returns to the comparator 14 again as described above. Eventually, as time passes and the logical formula T≧A-D is satisfied, it becomes Yes and outputs the third signal as 32. In this way, the second signal 33 and the first signal 34 are output, and finally, when T=A, 35 is output as a completion signal and the timer is reset 36.

The above explanation was about a timer, but in the case of a counter, a sensor for counting objects (
(not shown) and inputs the signal of this sensor to the comparator 13,
Further, the completion time setting device 19 can be read as the completion number setting device 19, and the D-C@B setting devices 21 to 23 are set to a number instead of a time.

[Effects of the Invention] As explained above, the multi-output timer of the present invention has a setting device for setting the timing completion time as well as a setting device for setting a time before the timing completion time, so that the timing start time can be adjusted. At each later point in time, a comparator compares the time before the timing completion time, and if they match, a signal is output. For this reason, the number of timers is reduced, the installation area of the timers is reduced, and since the time immediately before the completion time is directly set, it has many advantages such as ease of operation.

[Brief explanation of drawings]

The figure shows a flowchart of one embodiment of the present invention. 12...Pulse transmitter, 13 to 16/18...
Comparator, 19... Completion time setter, 20 to 23.
・・Time setting device before the completion time.

Claims (1)

[Scope of Claims] A timer or counter that has a setter for setting a timing completion time or number, starts timing based on an external signal, and emits a signal when the set value is reached, the timing completion time or number being used as a reference point. By having a second setter that sets a time or number before that, a signal is generated when the time or number obtained by subtracting the time or number set by the second setter from the timing completion time or number is reached. A multi-output timer or multi-output counter configured to emit a signal. 2) The multi-output timer or multi-output counter according to claim 1, characterized in that the second setter is a plurality of second, third, . . . n-th setters.