ResourcesElectrical schematic symbolsLogic and PLC diagram
Level control logic
Pump station level control: level latch, auto and manual start, overload inversion, run command, run feedback supervision with a 10 s delay, a latched alarm and a daily start counter.
Free to use and modify in your own projects, including commercial ones. The ZIP holds the sample drawing, a template, a plot style table and a README; no add-in needed. The data in the drawing is made up, so it is not for design or construction. Provided as is, without warranty. Library terms (CXL-1.0)
Version 1.0 · updated October 21, 2026
This sample uses these resources
The symbols are blocks from our own libraries, with their attributes filled in. The sheet and its title block come from our ISO A3 title block template. Download them to draw your own diagrams.
Layers, styles and sheet setup are the same for every drawing in the series; they are described on the series page: Logic and PLC diagram
Title block fields
The attributes of the title block. Double-click it to fill them in, or write them for a whole set of drawings with BlockSync.
| Attribute | Field on the sheet | Value in this sample |
|---|---|---|
| COMPANY | COMPANY | CADXChange |
| PROJECT | PROJECT | Pump Station Control |
| AREA | AREA | Pump station |
| SYSTEM | SYSTEM | 24 V DC |
| CLIENT | CLIENT | Sample |
| TITLE | DRAWING TITLE | Level control logic diagram |
| DRAWING_NO | DRAWING NO. | E-401 |
| CONTRACT_NO | CONTRACT NO. | — |
| REV | REV | A |
| DRAWN | DRAWN | — |
| CHECKED | CHECKED | — |
| APPROVED | APPROVED | — |
| DATE | DATE | 2026-10-21 |
| SCALE | SCALE | NTS |
| SHEET | SHEET | 1 |
| SHEET_OF | OF | 1 |
Revision table: R1 to R4, each with REV, DATE, DESCRIPTION and BY (16 attributes, empty in this sample).
Blocks in the drawing
The equipment list of the drawing: block name, symbol and how many times it is placed. BlockSync exports the same list from your own drawings.
| Symbol | Block | Placed |
|---|---|---|
 RS bistable | LGC_S01659_RS_BISTABLE | 2 |
 AND element | LGB_S01567_AND_ELEMENT | 2 |
 OR element | LGB_S01566_OR_ELEMENT | 1 |
 Negator | LGB_S01576_NEGATOR | 1 |
 Exclusive-OR element | LGB_S01574_EXCLUSIVE_OR_ELEMENT | 1 |
 Monostable, non-retrigger | LGC_S01675_MONOSTABLE_NON_RETRIGGER | 1 |
 Counter, decade | LGD_S01703_COUNTER_DECADE | 1 |
Equipment schedule
One row per placed symbol, read from the attributes of the blocks in the drawing: what is shown on the sheet, and the schedule attributes that were filled in but are not shown. BlockSync exports these same attributes from your own drawings.
| Tag | Description | Shown on the sheet | Filled in, not shown |
|---|---|---|---|
| RS1 | RS bistableLGC_S01659_RS_BISTABLE | FUNCTION = Level latch: set at high level, reset at low levelSTD_CLAUSE = IEC 60617-12 12-42-01STD_REF = S01659 | |
| A1 | AND elementLGB_S01567_AND_ELEMENT | FUNCTION = Auto start requestSTD_CLAUSE = IEC 60617-12 12-27-02STD_REF = S01567 | |
| O1 | OR elementLGB_S01566_OR_ELEMENT | FUNCTION = Start request, auto or manualSTD_CLAUSE = IEC 60617-12 12-27-01STD_REF = S01566 | |
| N1 | NegatorLGB_S01576_NEGATOR | FUNCTION = Overload inverted, healthySTD_CLAUSE = IEC 60617-12 12-27-11STD_REF = S01576 | |
| A2 | AND elementLGB_S01567_AND_ELEMENT | FUNCTION = Run commandSTD_CLAUSE = IEC 60617-12 12-27-02STD_REF = S01567 | |
| X1 | Exclusive-OR elementLGB_S01574_EXCLUSIVE_OR_ELEMENT | FUNCTION = Command and feedback differSTD_CLAUSE = IEC 60617-12 12-27-09STD_REF = S01574 | |
| T1 | Monostable, non-retriggerLGC_S01675_MONOSTABLE_NON_RETRIGGER | FUNCTION = Mismatch longer than 10 sSTD_CLAUSE = IEC 60617-12 12-44-02STD_REF = S01675 | |
| RS2 | RS bistableLGC_S01659_RS_BISTABLE | FUNCTION = Alarm latch, reset by acknowledgeSTD_CLAUSE = IEC 60617-12 12-42-01STD_REF = S01659 | |
| C1 | Counter, decadeLGD_S01703_COUNTER_DECADE | FUNCTION = Pump starts per daySTD_CLAUSE = IEC 60617-12 12-49-16STD_REF = S01703 |
Manufacturer, model and remarks are left empty on every block, ready for your data. The values are examples.
