JPH0446571A - Input-output device for sequence command - Google Patents

Abstract

PURPOSE:To decrease the number of inputs-outputs with sequencers while obtaining flexibility in bonding with internal switches by conducting bonding with a large number of the internal switches by selectively changing over a plurality of sequence input-output commands. CONSTITUTION:In a sequence input section 15, sequence inputs from four input terminals 111-114 are changed over selectively to set control outputs I1-In. In a sequence output section 16, three switches 131-133 are ON-OFF driven by selectively changing over (n) ON-OFF outputs from comparators 121-12n. The selective changeover of outputs is conducted arbitrarily by rewriting the content of a memory. Accordingly, input-output terminals can be reduced to mini-mum numbers.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to an input/output device for sequence commands in an inverter.

B6 Summary of the Invention The present invention provides a general-purpose/multifunctional inverter that controls a large number of internal switches and obtains internal status signals from a large number of switches by inputting and outputting sequence commands, and includes: a sequence input section that selects and switches sequence input/output commands; By providing an output section, the number of inputs and outputs to and from the sequence can be reduced, and flexibility can be provided in connection with internal switches.

C9 Conventional technology A general-purpose, high-performance inverter is configured to be able to switch to various control methods and frequencies depending on the operation required by the load, such as programmed operation of the motor, and is also capable of extracting various status signals. It is configured so that it can be done.

FIG. 4 is a configuration diagram showing a conventional general-purpose, high-performance inverter. The inverter 1 indicated by the broken line block is the forward converter 2
A main circuit is constituted by the inverse converter 3 and the inverse converter 3, and operates the speed of the induction motor 4 serving as the load in a programmed manner. Inverter 1
The control device has a frequency setting input terminal 5. ．． The frequency setting signal given to 5□ is switched and fetched with the changeover switches 61 and 6°, and the frequency setting signal of the internal frequency setter 71.72 is also switched and fetched with the changeover switch 63.64, and this frequency setting signal is sent to the cushion. The inclination set as an input to the calculation unit 8 is used to calculate the increase or decrease up to the set signal, and the speed/torque control unit 9 performs PWM control of the inverse conversion unit 3 using the calculation result as a speed command. The cushion characteristics of the cushion calculation unit 8 are changed over by a changeover switch 101.10□. These changeover switches 6, -64, 10+, and 102 are supplied from sequence input terminals 111-116, respectively. Sequence command ■
Switching is controlled by 1 to 6.

On the other hand, the state signals of each part such as the speed/torque control part 9 are sent to the comparator 12. ~124 etc. are detected as on/off signals, and these on/off signals are used to switch switches 131 to 134.
By controlling on/off the sequence output terminal 141
~144 is taken out as a sequence output signal. Note that the sequence input and circuit of the torque control system are omitted from illustration.

D Problems to be Solved by the Invention In general-purpose, high-performance inverters, the more versatile and sophisticated the functions become, the more complex the switching of settings, switching of control methods, and the extraction of status signals become. Therefore, a large number of sequence input/output terminals are required, and the wiring inside the inverter device 1 becomes complicated. These sequence input/output terminals and wiring are used selectively depending on the system to which the inverter device I is applied, and there is also a problem that most of them are not used and are wasted when incorporated into an actual system.

Furthermore, the correspondence between sequence inputs and outputs and internal switches is fixed, making it difficult to change specifications.

SUMMARY OF THE INVENTION An object of the present invention is to provide an input/output device that reduces the number of inputs and outputs to a sequencer and has flexibility in connection with internal switches.

81 Means and Effects for Solving the Problems In order to achieve the above-mentioned object, the present invention provides that function selection is performed by switching a large number of switches, the switching of the switches is changed by external sequence command input, and a large number of internal In a general-purpose multifunctional inverter configured to convert a status signal into a control signal for an on/off switch and output it to the outside as a sequence command output from the on/off switch, a plurality of sequence command inputs from the outside are transmitted to each of the plurality of switches. a sequence input section that converts a selected one of the plurality of internal state signals into a switching signal, and a sequence output section that converts a plurality of signals selected from the plurality of internal state signals into respective control signals of the off-O-off switch, The sequence input section performs selection and switching for coupling the sequence input of 1 to a large number of internal switches, and the sequence output section performs selection and switching for coupling a large number of internal state signals to a plurality of switches.

F. Example FIG. 1 is a block diagram showing an embodiment of the present invention.

The difference between this figure and FIG. 4 lies in the configuration of the sequence input section and the sequence output section. The sequence input unit 15 is a functional block that selects and switches sequence inputs from four input terminals 11° to 114 to set control outputs 1 to 1. The sequence output unit 16 is a functional block that selects and switches n on/off outputs from the comparators 121 to 12 to turn on and off the three switches 131 to 133, and has three sequence output terminals 141. Get the output at ~143. These sequence input section 15 and sequence output section 16 are realized by a hardware configuration or a software configuration, but even more flexibility can be achieved by using a software configuration.

FIG. 2 shows a specific configuration of the sequence input section 15. As shown in FIG.

The switching circuit 151 is composed of a group of gate elements, and has sequence input terminals 11. Inputs from ~114 and internal inputs (O
N, 0FF) is switched and outputted to any of the control outputs 11 to 8 on a one-to-one basis. This switching control signal is transmitted to the rewritable memory 15.
2 is given by the selection data stored in . The memory 152 has terminals 11 . ~11
Selection data of inputs SII to SI4 from 4 and selection data of internal inputs (ON, 0FF) are written. In the figure, for example, the control output (1) is turned off so that no input is applied, and the control output (I2) is shown as data for selecting the input Slr. The operation section 153 is provided on the panel of the inverter device 1 and is composed of a numeric display 154 and an operation key 156.
Rewrite the contents of. The contents of this rewriting data and the data of each part of the memory are numerically displayed on the numerical display 154.

With this configuration, a necessary function can be selected from the various functions of the inverter device 1 by sequence input from the input terminals 111 to 114 and internal input. What should be noted here is that the four inputs Sll to SI4 to 6
so that selection switching to outputs 11 to 16 is performed.
A large number of control outputs can be obtained from a small number of input terminals.

In addition, the control output selection can be changed arbitrarily by rewriting the contents of the memory 152, making it easy to change the selection according to the system in which the inverter device 1 is used. It can also be used to select internal inputs, reducing external wiring.

FIG. 3 shows a specific configuration of the system output section 16. The switching circuit 161 is composed of a group of gate elements, and converts on/off signals of the comparators 121 to 121 etc. to the switches 131 to 121.
The output is switched to any one of 133 in 1 increments. This switching control signal is given by selection data stored in rewritable memory 162. The memory 162 has three switches 13
．． -133, respectively, and these data determine which of the inputs 01-On will be the switch control output. The contents of this memory 16□ are stored in the operation section 15. which also serves as a sequence input section. key 15
．． can be rewritten by

Also in the configuration of the sequence output section described above, a necessary output can be selected and extracted from a large number of output signals, similarly to the sequence input/output section described above.

The number of output terminals 141 to 143 is reduced to the minimum number, and selection switching can be changed arbitrarily.

Effects of the G9 Invention As described above, according to the present invention, the selection and switching of a plurality of sequence human output commands connects them to a large number of internal switches, thereby minimizing the number of input/output terminals and wiring, and This is a highly flexible combination that requires only rewriting the contents of the memory to change the selection.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is an inverter configuration diagram showing an embodiment of the present invention, FIG. 2 is a specific configuration diagram of a sequence input section, FIG. 3 is a specific configuration diagram of a sequence output section, and FIG. FIG. 4 is a configuration diagram of a conventional inverter. ■... Inverter device, 8... Cushion calculation unit,
9... Speed/torque control unit, 111, 114... Sequence input terminal, 12,, 12. ... Comparator, 131.133 ... Switch, 141,143
... Seedence output terminal, 15... Sequence input section, 15. ...Switching circuit, 15□...Writable memory, 16...Sequence output section, 161...Switching circuit, 162...Writable memory. Figure 2: Specific configuration of the sequence input section 1 person outside the diagram 153...

Claims (1)

[Claims] (1) Function selection is performed by switching a large number of switches, and the switching of the switches is changed by inputting a sequence command from the outside, and a large number of internal status signals are used as control signals for the on/off switch, and the sequence is sequenced from the on/off switch. In a general-purpose/multifunctional inverter configured to output commands to the outside, the sequence input section converts a plurality of sequence command inputs from the outside into a switching signal for each of the plurality of switches selected from the plurality of switches; A sequence command input/output device comprising: a sequence output unit that converts a plurality of signals selected from internal state signals of the on/off switch into respective control signals for the on/off switch.