JP2006309727A - Programmable controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a programmable controller capable of deciding immediately which terminal a wiring is connected to that an input output signal has arrived at the wiring when either an input display light or an output display light turns on. <P>SOLUTION: The controller has: a terminal board for arranging a plurality of terminals for connecting external wiring; a terminal symbol sequence for arranging symbols for identifying the respective terminals which compose the terminal board adjacent to the terminal board so that they are adjusted to the terminal arrangement on the terminal board; and a display light sequence for arranging a plurality of display lights which turn on and off in accordance with signal states of the respective terminals composing the terminal board part. The respective terminal symbols composing the terminal symbol sequence and the respective display lights composing the display light sequence are arranged so that counterparts in both of the sequences overlap in position. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a programmable controller (hereinafter referred to as PLC) having a terminal block, and more particularly to a programmable controller having a state display function relating to an input terminal or an output terminal.

  As an example of this type of PLC, a plan view showing the appearance of a conventional PLC is shown in FIG. As shown in the figure, the housing of the PLC 1A has an input terminal block arrangement area a, an input terminal symbol arrangement area b, a main body area c, an output terminal symbol arrangement area d, and an output terminal block in the plane. It is divided into an arrangement area e.

  The input terminal block 2 is arranged in the input terminal block arrangement area a. In this example, although not shown in the figure, one having upper and lower two-stage terminal rows arranged so as to be shifted from each other by a half pitch is employed. Similarly, the output terminal block 3 is also arranged in the output terminal block arrangement area e. Even in this output terminal block, although not shown in the figure, one having two upper and lower terminal rows arranged with a one-half pitch shift is employed.

  In the input terminal symbol arrangement area b provided adjacent to the input terminal block 2, an input side wiring table 4 is drawn that corresponds to each of the two terminal columns of the input terminal block 2. As is apparent from the figure, the wiring table 4 is divided into two rows in alignment with the terminal arrangement of the input terminal block, and each row is divided into individual terminal widths, whereby an upper individual region 6 and a lower individual device are divided. Region 7 is partitioned.

  As is apparent from the figure, a terminal symbol 6 a is drawn at the center of each of the upper individual regions 6, and terminal symbols 7 a and 7 a are also drawn at the center of the lower individual region 7. As the terminal symbols 6a and 7a, terminal number numbers, common symbols COM, and the like are employed.

  Similarly, the output side wiring table 5 is also arranged in the output terminal symbol arrangement area d adjacent to the output terminal block 3. This output-side wiring table 5 is also divided into two rows according to the terminal arrangement of the output terminal block 3, and each row is divided for each terminal width, and the upper individual region 8 and the lower individual region 9 are partitioned. . A terminal symbol 8 a is drawn at the center of the upper individual area 8, and a terminal symbol 9 a is drawn at the center of the lower individual area 9. As the terminal symbols 8a and 9a, terminal number numbers and common symbols COM are adopted.

  On the other hand, the main body area c is provided with an input indicator lamp arrangement area f and an output indicator lamp arrangement area g. In the input indicator lamp arrangement region f, twelve indicator lamps 10 of 1CH corresponding to the upper terminal row and twelve indicator lamps 11 of 0CH corresponding to the lower terminal row are arranged. Corresponding terminal symbols 10a and 11a are drawn next to the indicator lights 10 and 11. Here, the indicator lamp row 10 and the indicator lamp row 11 are arranged at equal intervals without shifting the pitch, and the arrangement pattern is different from the terminal arrangement of the input terminal block 2. Note that “CH” in “0CH” and “1CH” represents an abbreviation when the internal memory of the PLC is handled in units of 16 bits. The number before “CH” represents the number when the internal memory of the PLC is divided in units of 16 bits.

  In the output indicator lamp arrangement region g, eight display lamps 12 of 10CH corresponding to the upper terminal row and eight indicator lamps 13 corresponding to the lower terminal row are arranged. Corresponding terminal symbols 12a and 13a are drawn immediately below these indicator lights 12 and 13. Even in this example, the indicator lamp rows 12 and 13 are arranged at equal intervals without shifting the pitch, and the arrangement pattern is different from the terminal arrangement of the output terminal block 3.

  The input indicator lamp rows 10 and 11 respectively represent the signal states of the corresponding terminals, and the corresponding input indicator lamps are lit when the signal of any of the input terminals is turned on. Similarly, the output indicator light trains 12 and 13 represent the signal states of the corresponding output terminals. If the signal of any output terminal is turned on, one of the corresponding output indicators 12, 13 is lit.

  In general, the lighting of the input indicator lamps 10 and 11 is directly driven by a signal given to the corresponding input terminal. On the other hand, lighting of the output indicator lamps 12 and 13 is driven through a so-called output refresh process of the PLC.

For example, Patent Document 1 is known as a conventional technique for improving the function of an input / output indicator lamp in connection with an input / output terminal block of a PLC.
Japanese Patent Laid-Open No. 11-260438

  However, in the conventional PLC 1A described with reference to FIG. 7, the terminal symbol arrangement in the input side wiring table 4 or the output side wiring table 5 is the terminal arrangement of the actual input terminal block 2 and output terminal block 3. However, the symbol arrangement in the input indicator lamp arrangement area f and the output indicator lamp arrangement area g is completely different from the terminal arrangement of the input terminal block 2 and the output terminal block 3. In addition, since there is no positional alignment between the two, even if one of the indicator lights 10, 11, 12, 13 is turned on when a wiring check or a fault diagnosis is performed, it is immediately performed. It is impossible to instantly understand which input terminal or which output terminal has a change in signal state. For this reason, it has been pointed out that it is inconvenient for maintenance personnel and operators.

  That is, for example, even if the 0CH indicator light “03” is lit, the terminal symbol “03” attached thereto is used to find “03” of 0CH drawn in the input side wiring table 4, There is a problem in that it is difficult to easily understand which wiring is associated with which input signal is turned on unless a complicated process of reaching the wiring connected to the terminal in a position matching it is taken.

  The present invention has been made paying attention to such conventional problems, and the object of the present invention is wiring connected to which terminal when either the input indicator lamp or the output indicator lamp is lit. It is to provide a PLC that can immediately determine whether an input / output signal has arrived.

  Other objects and operational effects of the present invention will be easily understood by those skilled in the art by referring to the following description of the specification.

  In order to achieve the above object, the programmable controller of the present invention includes a terminal block in which a plurality of terminals for connecting external wiring are arranged, and a symbol for identifying each terminal constituting the terminal block, Arrange the terminal symbol string that is arranged adjacent to the terminal block so that it matches the terminal arrangement for the terminal block, and multiple indicators that turn on and off according to the signal status of each terminal that constitutes the terminal block. The individual terminal symbols constituting the terminal symbol row and the individual indicator lights constituting the indicator lamp row are arranged so as to overlap each other correspondingly. It is characterized by that.

  According to such a configuration, the individual terminal symbols constituting the terminal symbol row and the individual indicator lights constituting the indicator lamp row are arranged so as to overlap each other correspondingly. In addition, since the terminal symbol string itself is also arranged adjacent to the terminal block so as to match the terminal arrangement on the terminal block, one of the indicator lamps constituting the indicator lamp string is turned on or off. Then, it is possible to immediately determine the position of the corresponding terminal block from the position of the terminal symbol applied to the indicator lamp that has been turned off, and thus anyone can easily determine the signal wiring that is applied to turn on and off the indicator lamp. It should be.

  In a preferred embodiment of the programmable controller of the present invention, a housing having a terminal block, a circuit board housed in the housing, an LED array mounted on the circuit board, and one end on the circuit board You may make it have a light guide which has a some light guide part located in each of LED row | line | column and the other end is located in the terminal symbol row | line | column arrange | positioned adjacent to the terminal block.

  According to such a configuration, while the LED row is mounted on the circuit board, the terminal symbol row can be drawn on the outer surface of the housing, so that it is not necessary to attach the indicator lamp directly on the housing. The structure of the housing is simplified, and the design of the apparatus becomes easy.

  In a preferred embodiment, the circuit board is a main circuit board on which an LSI corresponding to the main circuit is mounted, and the LED row is arranged along an edge of the main circuit board. There may be. According to such a configuration, it is possible to arrange the indicator lamps adjacent to the terminal block while the LED rows are mounted on the main circuit board, so that it is not necessary to separately provide a display dedicated board on which the LEDs are mounted. The cost can be reduced accordingly.

  Further, each LED constituting the LED row is arranged on a circuit board corresponding to a position immediately below each terminal symbol constituting the terminal symbol row, and each light guide portion connecting each LED and each element symbol is a linear light guide. It may be a pin. According to such a configuration, the length of the light guide portion is made uniform by the light guide pins on the straight line, the amount of light derived from the LED row to each terminal symbol is made uniform, and visibility is improved.

  In addition, a transparent window is formed at the end of the light guide opposite to the LED, and a transparent sheet on which a terminal symbol is drawn is disposed in the transparent window, and the terminal symbol on the transparent sheet is an LED. The light may be illuminated with light guided by the light guide unit.

  According to such a configuration, terminal symbols drawn at appropriate intervals on the transparent sheet are clarified by being illuminated with light from the LED from the back side, so even with a relatively simple configuration, Terminal symbols can be drawn clearly.

  Here, as the terminal symbol, various configurations such as a character symbol for identifying the terminal can be adopted. However, if the terminal symbol is a terminal number, the corresponding terminal can be immediately determined from the terminal symbol. , Usability is good.

  The present invention may be configured as a programmable controller having an input terminal block and / or an output terminal block. According to such a configuration, in the programmable controller, the relationship between each terminal and its signal state can be displayed in an easy-to-understand manner, and the operability is good during maintenance and troubleshooting.

  In the present invention, the terminal symbol indicator lamp corresponding to each terminal constituting the input terminal block is directly linked to the input signal to the terminal without going through the input refresh process of the programmable controller. Alternatively, the light may be driven. Here, the input refresh processing means that a signal from an external device (sensor, switch, etc.) fetched into the programmable controller via the input terminal is transferred to a predetermined internal memory (memory accessed when executing the user program). It is a process to reflect.

  The indicator lamps of the terminal symbols corresponding to the respective terminals constituting the output terminal block may be driven to light through an output refresh process of the programmable controller. Here, the output refresh process is to output data of a predetermined internal memory (memory storing the execution result of the user program) of the programmable controller to an external device (actuator, lamp, etc.) via an output terminal. This process is reflected in the memory.

  Further, the terminal block has an upper terminal row and a lower terminal row arranged so as to be shifted from each other by 1/2 pitch, and the terminal symbol row and the indicator lamp row are arranged in a staggered manner adjacent to the terminal block. May be. According to such a configuration, the correspondence relationship between the terminal arrangement for the terminal block, the terminal symbol row, and the indicator lamp row is further clarified, and the usability for maintenance and troubleshooting is improved.

  According to the programmable controller of the present invention, the individual terminal symbols constituting the terminal symbol row and the individual indicator lights constituting the indicator lamp row are arranged so as to overlap each other in correspondence. In addition, since the symbols for identifying the respective terminals constituting the terminal block are arranged adjacent to the terminal block so as to match the terminal arrangement on the terminal block, the symbol is not matched with any terminal symbol. When the indicator lamp that turns on or off turns on, the terminal to which the corresponding wiring is connected can be immediately identified based on the positional relationship between the indicator lamp and the terminal symbol that makes a pair. The workability in is good.

  Hereinafter, an embodiment of a PLC according to the present invention will be described in detail with reference to the accompanying drawings.

  A plan view showing the appearance of a PLC to which the present invention is applied is shown in FIG. As shown in the figure, the housing of the PLC 1 has an input terminal block arrangement area a, an input terminal symbol arrangement area b, a main body area c, and an output terminal symbol in the same plane as in the prior art. It is divided into an arrangement area d and an output terminal block arrangement area e.

  The input terminal block 2 is arranged in the input terminal block arrangement area a. The input terminal block 2 includes an upper input terminal row 21 in which upper terminals 21a are arranged in one row, and a lower input terminal row 22 in which lower terminals 22a are arranged in one row. As is apparent from the figure, the upper input terminal row 21 and the lower input terminal row 22 are shifted in the 1/2 pitch width direction and have a so-called staggered terminal arrangement. This is to facilitate the wiring work.

  Similarly, the output terminal block 3 is arranged in the output terminal block arrangement area e. In this example, the output terminal block 3 includes an upper output terminal row 31 in which upper stage terminals 31a are arranged in one row, and a lower stage output terminal row 32 in which lower stage terminals 32a are arranged in one row. It is out. As is apparent from the figure, the upper output terminal row 31 and the lower output terminal row 32 are shifted in the half width direction and have a so-called staggered terminal arrangement pattern.

  An input side wiring table 4 is provided in the input terminal symbol arrangement area b. As will be described in detail later, the input-side wiring table 4 has terminal symbols drawn on a transparent resin sheet by printing, and is attached to the upper surface of a light guide to be described later.

  Similarly, the output side wiring table 5 is also provided in the output terminal symbol arrangement region d. Also in the output side wiring table 5, as will be described in detail later, terminal symbols are drawn on the surface of a transparent resin sheet by printing, and are pasted on the upper surface of a light guide to be described later.

  In addition, in FIG. 1, 14 is a driving | running state display part, 15,16,19 is an accessory storage part, 17 is a battery accommodating part, 18 is operation equipment accommodating parts, such as a volume, 21 is an analog input / output terminal part. .

  Next, an exploded perspective view showing the structure of the PLC is shown in FIG. As shown in the figure, the PLC includes an input side light guide 23, an output side light guide 24, a housing body 25, and a circuit board 26.

  In this example, the housing body 25 is in a state in which the input terminal block 2 and the output terminal block 3 are removed, and a circuit board 26 is mounted therein. The circuit board 26 mounts three LSIs 26f, 26g, and 26h constituting the main circuit. Further, the input side upper stage LED 26a and the input side lower stage LED 26b are mounted in two rows at an equal pitch on one side edge of the circuit board 26, and the output side upper stage LED 26c and the output side lower stage are mounted on the other edge. The LEDs 26d are arranged in two rows at an equal pitch. As will be described later, the display symbols are illuminated by light from these LEDs 26a to 26d.

  On the circuit board 26, 26e is a 7-segment display, which is used to display various operations during operation.

  On the other hand, the input-side light guide 23 has an upper surface 23c that is flush with the upper surface of the housing, and is arranged in two rows in the vertical direction from the lower surface side so that an upper guide pin 23a and a lower guide pin 23b protrude. Has been. These guide pins 23a and 23b are inserted into insertion holes 25a arranged on one side edge of the housing body 25, and their tips are connected to the input-side upper LED 26a and the input-side lower LED 26b mounted on the circuit board 26. Positioned in close proximity or in contact. On the other hand, the output-side light guide 24 similarly has an upper surface 24c, and an upper guide pin 24a and a lower guide pin 24b are formed so as to protrude from the lower surface. The upper guide pin 24a and the lower guide pin 24b are inserted into the insertion holes 25b formed in two rows on the other side edge of the housing body 25, and the tip or lower end thereof is the other side edge of the circuit board 26. The output side upper stage LED 26c and the output side lower stage LED 26d arranged in the section are positioned close to or in contact with each other.

  Therefore, when any one of the LEDs 26a to 26d on the circuit board 26 is lit, light from these LEDs is guided by the corresponding guide pins 23a, 23b, 24a, 24b and the upper surface 23c of the input side light guide 23 or the input. It reaches the upper surface 24 c of the side light guide 24. Then, the terminal symbols drawn on the wiring tables 4 and 5 attached to the upper surfaces of the input-side light guide 23 and the output-side light guide 24 are illuminated and clearly drawn by the light guided from the LED. It becomes.

  This terminal symbol display operation is shown in the AA cross-sectional view of FIG. 3, an enlarged view of a portion B of FIG. 4, the explanatory diagram of the input side light guide wiring table of FIG. 5, and the output side light guide wiring table of FIG. This will be described in detail below with reference to the explanatory drawings.

  As shown in FIG. 3, the light from the input-side upper LED 26a, the input-side lower LED 26b, the output-side upper LED 26c, and the output-side lower LED 26d mounted on the surface of the circuit board 26 is the lower light guide pin 23b and the upper light, respectively. The light is radiated to the upper surfaces 23c and 24c of the input side light guide 23 and the output side light guide 24 through the guide pin 23a, the upper light guide pin 24a, and the lower light guide pin 24b.

  As shown in FIG. 5A, the input side wiring table 4 is attached to the upper surface of the input light guide. This input-side wiring table 4 is divided into two rows according to the terminal arrangement of the input terminal block, and each row is further divided in accordance with the individual terminal width, and is divided into an upper individual region 41 and a lower individual region 42. It is partitioned. A terminal number 27a, which is one of the terminal symbols 27, is drawn at the center of the upper individual area 41, and similarly, a terminal number 27a, which is one of the terminal symbols 27, is similarly displayed at the center of the lower individual area 42. Is drawn.

  As shown in the enlarged view of the D part in FIGS. 5B and 5C, a transparent window corresponding to the exit of the light guide pin is formed in the center of the upper individual region 41, and this window part. Becomes the light emitting part 41a. Similarly, a transparent window corresponding to the exit of the light guide pin is also formed in the center of the lower individual area 42, and this transparent window becomes the light emitting area 42a. That is, the upper individual region 41 and the lower individual region 42 are elongated rectangular regions that are closely adjacent to each other, but only the central portion is actually formed of a transparent material in a rectangular shape corresponding to the exit of the light guide pin. Thus, when the corresponding LED emits light, the light is guided through a guide pin to a rectangular transparent window provided in the center of the regions 41 and 42, and as a result, the terminal number drawn therein The number 27a is illuminated from behind by the LED light, and the terminal number number 27a is clearly drawn. In FIG. 5A, reference numeral 14 denotes a display unit, and 14a denotes a 7-segment display area. Light from the 7-segment display 26e accommodated in the housing can be seen from the upper surface of the housing through the display area 14a. .

  Next, as shown in FIG. 6A, the wiring table 5 is also attached to the upper surface of the output side light guide 24. This wiring table 5 also draws the upper individual area 51 and the lower individual area 52 on a transparent resin sheet using a printing technique, and similarly uses the printing technique at the center of these areas to express the terminal number 28a. Is drawn.

  Further, as shown in the enlarged view of part C in FIGS. 6B and 6C, a rectangular transparent portion is provided in the substantially central portion of each individual region 51, 52. This transparent portion Corresponds to the exit of the light guide pin. Therefore, when the LED on the circuit board is lit, the light is guided to the upper surface of the light guide 24 through the light guide pin, and the terminal number number drawn there is illuminated from behind to clearly draw it. It is. As a result, as is clear from the enlarged view of the CB portion shown in FIG. 64, when the LED is not illuminated, each of the upper individual region 51 and the lower individual region 52 is shown in FIG. The terminal number numeral 28a drawn at the center of the LED is not particularly remarkably illuminated, but as shown in FIG. The numeral 28a receives the light of the LED from behind, and the rectangular area emits light as shown in the light emitting part 51a, so that the dark numeral part is clearly drawn in the bright background.

  As described above, according to the PLC 1 of this embodiment, a terminal block (input) in which a plurality of terminals (upper terminal 21a, lower terminal 22a, upper terminal 31a, lower terminal 32a) for connecting external wirings are arranged. The terminal block 2 and the output terminal block 3) and symbols (for example, the input terminal number numeral 27a and the output terminal number numeral 28a) for identifying each terminal constituting the terminal block are matched with the terminal arrangement on the terminal block. Thus, the terminal block is composed of terminal symbol strings (27a, 27b, 28a, 28b, 28c28a... 28a, 28a) arranged adjacent to the terminal block (input terminal block 2, output terminal block 3). Individual terminal symbols (27) having a plurality of indicator lamps (light emitting areas 41a, 42a, 51a, 52a) that are turned on and off in accordance with the signal state of each terminal to be connected, and constituting a terminal symbol row , Each indicator (light emitting region 41a constituting the indicator column and 28a), 42a, 51a, 52a) and, in between corresponding ones, is what is arranged so as to overlap the positional.

  Therefore, as is apparent from FIG. 1, according to the present invention, if any one of the light emitting regions emits light and the terminal number number drawn in the central portion is clearly drawn, immediately above the light emitting portion. Alternatively, it is possible to grasp at a glance that such a signal has been output or arrived at the wiring of the terminal located directly below, and the workability is remarkably improved during maintenance work or troubleshooting.

  In the above embodiment, the present invention is applied to an input / output unit integrated PLC (sometimes referred to as a package type PLC), but the application of the present invention is not limited to this. The same application can be applied to an input unit, an output unit, an input / output unit, and a remote input unit, a remote output unit, a remote input / output unit and the like connected to the master unit via communication in a type PLC. In other words, the present invention can be applied to an apparatus having a terminal block in which a plurality of terminals for connecting signal lines (external wiring) for connecting to external devices are arranged in the case of configuring a PLC system. It is.

  According to the terminal block device of the programmable controller of the present invention, the individual terminal symbols constituting the terminal symbol row and the individual indicator lights constituting the indicator lamp row are positioned so as to overlap each other. The symbols for identifying each terminal that is arranged and that constitutes the terminal block are arranged adjacent to the terminal block so as to match the terminal arrangement on the terminal block. If the indicator light that is paired with the terminal symbol is turned on or off, the terminal to which the corresponding wiring is connected can be immediately identified based on the positional relationship between the indicator light and the terminal symbol that makes a pair, and troubleshooting And workability during maintenance is improved.

It is a top view which shows the external appearance of PLC to which this invention was applied. It is a disassembled perspective view which shows the structure of PLC. It is AA sectional drawing in FIG. It is the B section enlarged view in FIG. It is explanatory drawing of the wiring table of an input side light guide. It is explanatory drawing of the wiring table of an output side light guide. It is a top view which shows the external appearance of the conventional PLC.

Explanation of symbols

1 PLC
2 Input terminal block 3 Output terminal block 4 Input side wiring table 5 Output side wiring table 14 Operation display unit 15, 16, 19 Accessory storage unit 17 Battery storage unit 18 External operation device storage unit 21 Upper input terminal row 22 Lower input terminal Row 21a Upper stage terminal 22a Lower stage terminal 23 Input side light guide 23a Upper stage guide pin 23b Lower stage guide pin 23c Upper surface 24 Output side light guide 24a Upper stage guide pin 24b Lower stage guide pin 24c Upper surface 25a Insertion hole 25b Insertion hole 26 Circuit board 26a Input side upper stage LED
26b Input side lower LED
26c Output side upper LED
26d Output side lower LED
26e 7-segment display 26f, 26g, 26h LSI constituting main circuit
27 Terminal symbol 27a Terminal number numeral 28 Terminal symbol 28a Terminal number numeral 31 Upper output terminal row 31a Upper stage terminal 32 Lower output terminal row 32a Lower stage terminal 41 Upper individual area 41a Light emitting area 42 Lower individual area 42a Light emitting area 51 Upper individual area 52 Lower stage Individual area 51 Upper individual area 52 Lower individual area 51a Light emitting area 52a Light emitting area

Claims (10)

A terminal block in which a plurality of terminals for connecting external wiring are arranged;
A symbol string for identifying each terminal constituting the terminal block, a terminal symbol string arranged adjacent to the terminal block so as to match the terminal arrangement on the terminal block, and
A display lamp array in which a plurality of indicator lamps are turned on and off according to the signal state of each terminal constituting the terminal block, and each terminal symbol and display lamp array constituting the terminal symbol array The individual indicator lamps that are configured are arranged so as to overlap each other in a corresponding manner.
A programmable controller characterized by that. A housing having a terminal block;
A circuit board housed in the housing;
An LED array mounted on a circuit board;
A light guide having a plurality of light guide portions located at one end of each of the LED rows on the circuit board and at the other end of the terminal symbol row arranged adjacent to the terminal block;
The programmable controller according to claim 1. The circuit board is a main circuit board on which an LSI corresponding to the main circuit is mounted, and the LED row is arranged along an edge of the main circuit board.
The programmable controller according to claim 2. Each LED constituting the LED row is arranged on a circuit board corresponding to a position immediately below each terminal symbol constituting the terminal symbol row, and each light guide portion connecting each LED and each terminal symbol is a linear light guide pin. ing,
The programmable controller according to claim 3. A transparent window is formed at the end of the light guide opposite to the LED, and a transparent sheet on which a terminal symbol is drawn is disposed in the transparent window, and the terminal symbol on the transparent sheet is emitted from the LED. Illuminated by the light guided by the guide part,
The programmable controller according to claim 2. The terminal symbol is a terminal number,
The programmable controller according to claim 2. Configured as a programmable controller having an input terminal block and / or an output terminal block,
The programmable controller according to claim 2. The indicator lamp of the terminal symbol corresponding to each terminal constituting the input terminal block is directly driven to light in conjunction with the input signal to the terminal without going through the input refresh process of the programmable controller.
The programmable controller according to any one of claims 1 to 7. The indicator light of the terminal symbol corresponding to each terminal constituting the output terminal block is driven to light through the output refresh process of the programmable controller.
The programmable controller according to any one of claims 1 to 7. The terminal block has an upper stage terminal row and a lower end terminal row arranged with a ½ pitch shift from each other, and the terminal symbol row and the indicator lamp row are arranged in a staggered manner adjacent to the terminal block.
The programmable controller according to any one of claims 1 to 9.

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