JPH04275084A - Variable speed driver - Google Patents

Abstract

PURPOSE:To easily cope with various application at user level by standardizing a variable speed driver. CONSTITUTION:A table T is provided in a memory of a variable speed driver comprising at least a processor 1, an I/O unit 2 and the memory 3. A standard variable speed driver can easily cope with various application based on correspondence between I/O terminals and I/O signals defined on the table T.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable speed drive device such as a variable voltage variable frequency (VVVF) inverter.

0002

2. Description of the Related Art Recently, many variable speed drive devices utilize microprocessors to perform control, arithmetic operations, or sequence processing. By the way, the input/output signals handled by such a variable speed drive device include, for example, "normal rotation command", "free run stop command", "speed setting signal", and "zero speed state"; Generally, they are in one-to-one correspondence with each input/output terminal of the device. On the other hand, the application of this type of variable speed drive device is expanding in various fields, and a large number of input/output terminals are required. It is normal that this is supported by

0003

[Problem to be solved by the invention] However, with this method, it is necessary to prepare dedicated hardware for each slight change, which causes problems such as not only complicated handling but also high costs. be. Therefore, an object of the present invention is to standardize (generalize) a variable speed drive device so that it can be easily adapted to various uses at the user level.

0004

[Means for Solving the Problems] In order to solve such problems, the present invention provides a table in the memory of a variable speed drive device that includes at least an input/output device, a memory, and a processor, and uses this table to The device is characterized in that each input/output terminal of the input/output device is associated with various input/output signals to be input/output therein according to the purpose, thereby enabling operation according to the purpose.

[0005]

[Operation] By associating input/output terminals and input/output signals using the above table, various applications can be easily handled at the user level. In other words, by making the variable speed drive device more versatile, it is possible to save time and effort in manufacturing and reduce costs.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of the present invention. That is, it is the same as a general variable speed drive device in that it consists of a processor (CPU) 1, an input/output device 2, a memory 3, and a bus 4, but here the memory 3 is provided with a table T as shown in FIG. is a feature.

An example of the table shown in FIG. 2 is shown. In addition,
#1, 2 to M in the same figure indicate each channel number, and DI
1 to DI4 (generally N pieces) indicate each terminal of the input/output device. Here, when driving an elevator by the variable speed drive device according to the present invention, as shown in the figure, for example, a "multi-stage speed setting 1" signal is sent to the terminal DI1, a "multi-stage speed setting 2" signal is sent to the terminal DI2, and a "multi-stage speed setting 2" signal is sent to the terminal DI3. is the "torque limit" signal, and the terminal DI4 is the "torque bias command".
The signals are associated with each other, and when driving the extruder, the "multi-stage speed setting 1" signal is sent to the terminal DI1, the "torque limit" signal is sent to the terminal DI2, the "reverse rotation prevention" signal is sent to the terminal DI3, and the "reverse rotation prevention" signal is sent to the terminal DI4. “PI of ASR (speed regulator)
(proportional, integral) parameter switching signals are associated with each other.

[0008] In this way, for example, when operating as an elevator, if an instruction to that effect is given to the processor 1, the processor 1 can determine the meaning of the signals given from each input/output terminal by referring to the table T. Based on this judgment, predetermined calculations and control can be executed. This also applies to other uses. In this way, by associating (setting) input/output terminals and input/output signals using table T, it becomes possible to easily handle various applications at the user level.

[0009] In the above description, the case where digital input signals are mainly associated has been explained, but it goes without saying that digital output signals and analog input/output signals can also be associated in the same way. It is also possible to make this kind of correspondence individually, but doing so would require setting only the number of terminals, and the memory capacity to store this would also increase, so here we will set the channels for each purpose. By assigning a number and specifying this channel number, settings can be easily made. Therefore, for example, when driving a crane, correspondence can be established by simply specifying the channel number "#2", and the same applies to other uses. moreover,
The data set in the table in this way, as well as various parameters such as PI parameters, should be set in nonvolatile memory or capacitor-backed RAM, etc., so that the data will not be lost even if the power is turned off. is desirable.

0010

[Effects of the Invention] According to the present invention, a memory table is used to associate input/output terminals with input/output signals (
It becomes possible to provide a general-purpose variable speed drive device that can be easily adapted to various uses at the user level by simply setting the speed control device.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a specific example of a memory table.

[Explanation of symbols]

1 Processor (CPU) 2 Input/output device 3 Memory 4 Bus T table

Claims (1)

[Claims] 1. A table is provided in the memory of a variable speed drive device that includes at least an input/output device, a memory, and a processor, and the table identifies each input/output terminal of the input/output device and the various types to be input/output thereto. A variable speed drive device characterized by being able to operate according to the purpose by associating input and output signals with each other according to the purpose.