JPS60251721A - Electronic preset counter - Google Patents

Abstract

PURPOSE:To clear a count value of a counter without requiring an external reset circuit by providing a control section clearing a count value of a counter in step of a user's program. CONSTITUTION:Each step of the user's program includes an area of a control instruction. The control instruction includes an end flag designating the end of the program and an area of a clear instruction clearing the count value of an input counter. A control section of a CPU3 executes an output instruction of the step based on the coincident output of the comparator and when the clear instruction is set to the step, the clear control clearing the count value of the counter section is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electronic preset counter that performs various controls according to a counted value, and particularly relates to an electronic preset counter that can clear the counted value of the counter by a program. It is.

Conventional technology and its problems In electronic preset counters used for position control, etc., a plurality of set count values and output specifications corresponding to each of these counts are pre-programmed in pairs. , various processing is performed according to the program.

However, according to the conventional electronic presen counter,
When performing so-called relative control in which a new count is started from that position at the same time as an output operation is performed, or when clearing the count value of a counter with a predetermined value, for example, as shown in FIG.
The structure was such that the output given from the output end was input to the reset terminal of the electronic preset counter by setting a hardware circuit. For example, in the case of FIG. 4(a), when an output is generated at any of the output terminals 0-1 to 0-7, a reset signal is given by their logical sum signal to reset the δ1 value, and the δ1 value is reset. In Figure (bl), the counter is reset by applying a reset signal only when an output is generated at outputs 0-7.

Conventionally, in order to perform such operations, the user connects a dedicated external circuit that operates based on the output from a predetermined electronic preset counter, and the output from that external circuit is used as the reset input to the counter. The 11M problem was that it was difficult to assemble the system when processing complex processes. In addition, when such an external circuit is provided, there is a problem in that when a reset input is applied to the electronic presen 1 count, all outputs are turned off and the output cannot be maintained as it is, which may restrict its use. There were also points.

Purpose of the Invention The present invention eliminates the problems of the conventional electronic preset counter, and clears the count value of the counter without using an external circuit that generates a reset signal based on an output signal. The present invention provides an electronic pre-nano 1-count that can maintain the output as it is.

Structure and Effects of the Invention The present invention has a counting section that counts clock inputs, and a storage means that stores a count setting value and an output state corresponding to the counting setting, and performs an output operation based on the count value of the counting section. The electronic preset counter has a series of steps including a count setting section for storing a count setting value, an output specifying section, and a clear command for clearing the input count value. The set value of the count setting section of the step is sequentially given, and the comparison means which compares it with the count value of the counter section, and the comparison means which sequentially reads out the series of steps of the step (1) and goes to the comparison means. The method is characterized by comprising a control unit that executes an output command of the step based on the output, and performs clear control to clear the count value of the counting unit when a clear command is issued for the step. It is something.

According to the present invention having such characteristics, a clear instruction is provided to clear the count value of the counter during a step of the user program, and when the set value of the step is reached, the output operation is executed and the clear instruction is also provided. The count value of the counter is cleared depending on the instruction status. Therefore, the count value of the counter can be cleared without requiring an external register 21 to circuit. Furthermore, even if the count value of the counter is cleared, the output remains as it is, so there are no restrictions on the use of the output, and it is flexible depending on the control target, such as clearing the count value at a predetermined position or performing relative position control. This makes it possible to configure a control system that is flexible.

DESCRIPTION OF THE EMBODIMENTS FIG. 2 is a block diagram showing the structure of an embodiment of the electronic presen 1-counter according to the present invention. In this figure, an input signal (3) is applied from a rotary encoder or the like to the human power section 1 (3) in response to the movement of the controlled object. The counting unit 1 converts the level of this signal, shapes the waveform, and sends it to the central processing unit (hereinafter referred to as CP) via the input interface 2.
3) (referred to as U). Connected to the input interface 2 are a control input section 4 for receiving a reset signal and a gate signal, and a program input section 5 for writing a program by the user. In addition, the CPU 3 has a read-only memory (1a) as a storage device that records its calculation processing procedures.
(hereinafter referred to as ROM) [j, and random access memory (hereinafter referred to as RAM) that stores user programs, etc.
c) 7 is set. As will be described later, the CPU 3 outputs a predetermined output when the count value set by the Kneesab IJ Grad reaches 7, and the output is sent to the display section 9 and the output circuit 10 via the output interface LI 8. It is being revived. The output circuit 10 is provided with a plurality of output terminals Y-, which are selectively controlled by the output circuit 10. l'i'i) RAM 7 data is Hasoteri 1
Backed up by 1 -(.

FIG. 3 is a memory map showing the contents stored in the RAM 7. As shown in Figure 3 (ta), the RAM 7 has a user program area that stores the program up to step N, a step counter area that shows the step number currently being executed, and a setting value written in that step. A comparison register area for storing data, and an input counter area which is incremented according to the input from the counting input section 1 and constitutes a counting section that counts the number of input pulses are provided. Each step of the user program includes an area for storing step numbers, a setting value area for setting count values for output operations, and an area for output commands and control commands, as shown in detail in FIG. 3(b). It will be done. Output command is output circuit 1
Output terminal area to specify the output terminal of 0 and output mode, for example, cent output.

An output mode area is provided to specify output formats such as reset output, match output, and one-shot output, and an area for control instructions includes an end flag that specifies the end of the program, and a clear instruction area that clears the count value of the input counter. have.

FIG. 1 is a flowchart showing the operation of the electronic preset counter in this embodiment. This flowchar 1
The numbers shown using leader lines in - and [,' are operation steps of the CPU 3. In this figure, first, in step 21, the step counter of RAM 7 is set to 1. The process then proceeds to step 22, where the set value of the step indicated by the step counter is stored in the comparison register. Then step 2
Proceeding to step 3, it is checked from the control input section 4 whether or not there is one-man power for recessing. If there is a reset input, step 24
．． At step 25, the manual counter in the RAM 7 is cleared, all outputs are turned off, and the process proceeds to step 26. Step 2
If there is no reset input in step 3, it is checked whether there is a count input from the count input section 1 without performing these processes (step 26). If there is a count input, proceed to step 27 to check whether it is an addition input, and if it is an addition input, increment the input counter (step 28); if it is not an addition input, it is a subtraction input, so proceed to step 29. Decrement the manual counter from 1 to proceed to step 30. If there is no manual counting, the process proceeds to step 30 without performing these processes, and the manual counter's d1 number is set to the It axis. Check the power and whether there is ゛ζ. If this doesn't match, move on.

Returning to step 23, the same process is repeated until the value of the input counter matches the value of the comparison register by manual counting. If the count value of the input counter matches the comparison register, the process proceeds to step 31, where the output mode specified by the output command of the step indicated by the step counter is output to the specified output terminal. Then, the process proceeds to step 32, where it is checked whether the clear flag of the control command of that step is set. If this flag is set, clear the input counter (step 33); if this flag is not set, proceed to step 34).
Proceed to step 1 and check whether the control command En1: Flag is set. If the end flag is not set, the step counter is incremented and the process proceeds to step 22 to repeat the same process, and if the end flag is set, the process is terminated. To avoid this, set a clear flag in the desired control command of the user program. 2, "The count value of the IO2 two-man resistor can be reset, and it is possible to start counting anew and continue control.

[Brief explanation of the drawing]

FIG. 1 is a flowchart 1 showing the operation of an embodiment of the electronic preset counter according to the present invention, FIG. 2 is a block diagram thereof, and FIG. 3(a) is a diagram showing the storage contents of the RAM 7.
Figure 3 (bl is a memory map without showing the contents of each step), Figure 4 (al) and Figure 4 (bl) are an example of an external circuit for clearing the conventional electronic Blinano 1-count at a predetermined count time. ” is shown in 1. 1-=Count input section 2 Human interface 3--
-CPl, J 4=-Control input section 5----Program input section 6--ROM 71-RAM 8 Output interface 9-Display section 10--Output circuit Fig. 2 Fig. 3 (a)

Claims (1)

[Claims] (1) It has a counting section that counts clock inputs, and a storage means that records count setting values and output states corresponding to the counting settings, and performs output operations based on the counted values of the counting section. In the electronic preset counter, the storage means has a series of steps including a count setting section for storing a count setting value, an output specification section, and a clear command for clearing the input count value, and the series of steps of the storage means a comparison means for sequentially giving the setting value of the count setting section and comparing it with the count value of the counting section; and a control unit that executes the output command of the step and performs clear control to clear the counted value of the counting unit when a clear command is issued for the step. Preset counter.