JPH0620161Y2 - Selective display of output level and setting items - Google Patents

Description

TECHNICAL FIELD The present invention relates to a selective indicator of output level and setting items in a controller.

2. Description of the Related Art Referring to FIG. 1, a controller 1 such as a recent temperature controller has an input indicator 2 for digitally displaying an input of a measured value and the like.
In many cases, the display lamps L1 to L10 with the item display 11 indicating the setting item are equipped during the PID control, alarm, and other constant setting operations. Since many controllers of this type are mounted side by side on the same panel, it is desired to provide an analog display of the output level for the convenience of monitoring and for ensuring safety. It is expected that the analog display of the output level will not only help the monitoring but also contribute to the early detection of a failure in the case where there is an output abnormality that is not enough to give an alarm.

However, providing the analog display of the output level independently causes not only the tendency toward miniaturization of the controller but also the cost increase.

Therefore, the problem to be solved by the present invention is to realize the analog display of the output level in the controller having the selective display element of the setting item without adding the display element.

Means for Solving the Problems The present invention achieves an analog display of an output level in a controller by time-divisional use of a display for a control constant setting item.

Referring to FIG. 1, FIG. 4 and FIG. 5, the controller 1 to which the present invention is applied has an input value display 2 and a control element setting item selection switch 12. The controller 1 includes a row 10 of display lamps L1-L10, an item display 11 juxtaposed to each display lamp L1-L10, and the above-mentioned display lamp L1-corresponding to a selected setting item in response to the operation of the selection switch 12. An item display circuit 8 for activating L10 is provided.

Furthermore, in response to the output level of the controller, the above indicator lamp
A level switch 15 having a contact group V1-V10 sequentially connected to L1-L10 is connected to the controller output. Further, the timer T is energized when the selection switch 12 is operated, and the item display circuit 8 is driven by the selection switch 12 for an appropriate fixed period. After the fixed period, the drive switch of the item display circuit 8 is driven. Is switched from the selection switch 12 to the level switch 15.

2 and 3, in a preferred embodiment of the present invention, the controller 1 is provided with an openable / closable cover 20,
An opaque portion 21 is provided on a portion of the cover 20 facing the selection switch 12 when the cover 20 is closed. More preferably, the output display 22 is provided at a portion of the opaque portion 21 facing the display lamp row 10.

Operation The operation will be described with reference to FIGS. 1 and 4.

The selection switch 12 in the illustrated example includes a main selection switch 12a and an auxiliary switch 12b. Each time the main selection switch 12a is activated, the timer T is activated via the limit switch LS1. The energization of the timer T is self-held by its contact t1 for a certain holding time which is selectively set. When this timer T is energized, its a-contact t2 and b-contact
By t3, only the selection switch 12 is connected to the display lamp row 10 and the level switch 15 is separated from the display lamp row 10.

When the movable contact of the main selection switch 12a is in contact with the fixed contact m1, the display lamp L1 is energized.
The item display 11 indicates that the control constant setting has been selected. When the circuit of the fixed contact n1 of the auxiliary switch 12b is closed in this state, the display P of the auxiliary display lamp 11a is selected, and the proportional band P can be set by the relay RP in the setting relay 13 and the setting switch 14. . In the case of FIG. 4, the timer T is activated by the limit switch LS2 by the operation of the auxiliary switch 12b, and the holding time thereof is updated.

Similarly, when the movable contact of the main selection switch 12a is in contact with the fixed contact m1 and the circuit of the fixed contact n2 of the auxiliary switch 12b is closed, the display I of the auxiliary display lamp 11a is selected and set as the relay RI. The switch 14 allows the integration time I to be set. Further, when the circuit of the fixed contact n3 of the auxiliary switch 12b is closed while keeping the main selection switch 12a in the same state, the display D of the auxiliary display lamp 11a is selected,
The differential time D can be set by the relay RD and the setting switch 14.

Similarly, operate the main selection switch 12a to select the setting items such as alarm limit value ALM, control output limit value LMT, deviation BIAS, ramp RAMP, scale SCL, function FNC, etc., and set the setting value for each. It can be set by the switch 14 and the corresponding relay.

In this case, the column 10 of the indicator lamps displays the setting items.

When the selection switch 12 within the holding time of the timer T is not operated at all, the a-contacts t1 and t2 are opened and the b-contact t3 is closed, so that the row 10 of the indicator lamps is opened from the selection switch 12. And is connected to the level switch 15. At this time, the movable contact of the auxiliary switch 12b may be automatically returned to the OFF position.

The level switch 15, which is illustrated in FIG. 5 as a non-limiting example, comprises a movable iron piece-shaped drive unit 16 connected to the output and a contact portion having a fan-shaped movable contact 17 driven by this drive unit. The fixed contact groups V1-V10 of the level switch 15 are simultaneously brought into contact with the fan-shaped movable contact 17 sequentially from one end according to the output level.

As can be understood from FIG. 4 and FIG. 5, when the timer T is deenergized, the display lamps L1-L10 in the display lamp row 10 respond to the output level via the contacts V1-V10 of the level switch 15. The number is simultaneously activated from one end. Therefore, the length of the energized portion of the display lamp array 10 changes according to the output level, and the analog display of the output level is achieved. Moreover,
Since this display lamp row 10 is shared with the display of setting items, no special analog display is required.

Example In the above description, the selection switch 12 and the level switch
Although 15 and the item display circuit 8 connected thereto are shown as hardware, it will be apparent to those skilled in the art that these can be replaced by appropriate software.

In another embodiment of the present invention shown in FIGS. 2 and 3, the cover 20 is pivotally attached to the front frame 1a of the controller 1, and the selection switch of the controller front panel 1a is mounted on the front of the cover 20. 12
An opaque portion (21) is provided at a portion facing the. More preferably, OUTP is provided at a portion of the opaque portion 21 facing the display lamp row 10.
An output display 22 such as UT is provided. When the cover 20 is closed, the opaque portion 21 hides the item display 11, so the operator
The display lamp array 10 will be observed only as an output analog display.

Effect of the Invention As described in detail above, the selective display of the output level and the setting item according to the present invention has a row of display lamps in which the item displays are arranged side by side with a selection switch of the display item and a level switch responsive to the output level. The following effects can be obtained because it is selectively biased by.

(B) By using the set item display lamp row for output display in a time-division manner, the output level can be displayed in analog form without adding a special display element.

(B) The utilization efficiency of the front panel area of the controller can be improved.

(C) By hiding the item display with the cover having the opaque portion, it is possible to give an appearance as an output level indicator to the display lamp row during the output level display.

[Brief description of drawings]

FIG. 1 is an explanatory view of a selective display of output level and setting items according to the present invention, FIGS. 2 and 3 are explanatory views of other embodiments, and FIGS. 4 and 5 are circuit explanatory views. . T ... Timer, V1-V10 ... Display lamp, 1 ... Controller, 2 ... Input display, 3 ... Set value display, 8 ... Item display circuit, 10 ... Display lamp row, 11 ... … Item display, 12
...... Selection switch, 13 …… Setting relay, 14 …… Setting switch, 15 …… Level switch, 16 …… Driving part, 17 …… Movable contact, 20 …… Cover, 21 …… Opaque part, 22 …… Output display.

Claims (2)

[Scope of utility model registration request] 1. A controller having a selection switch for setting items, which is provided with a row of display lamps, an item display juxtaposed to each display lamp, and the above-mentioned display lamp corresponding to the selected setting item in response to the operation of the selection switch. An item display circuit that is activated, a level switch having a contact group that is sequentially connected to the row of the display lamps in response to an output level, and the item display circuit that is energized when the selection switch is actuated to be the selection switch for a certain period. A selective display of the output level and the setting item, which comprises a timer for switching the selection switch of the item display circuit to the level switch after the fixed period of time has elapsed. 2. The selective indicator according to claim 1, wherein the controller is provided with an openable / closable cover,
A selective indicator of an output level and setting items, which is provided with an opaque portion at a portion on the cover facing the selection switch when the cover is closed.