Devices and tags
Tags
Every device has a tag after IEC 81346: =PS+CAB1-K1.
| Part | Means | Example |
|---|---|---|
= function | what it is for | =PS pump station |
+ location | where it is | +CAB1 control cabinet, +FIELD on site |
- device | its letter and number | -K1 contactor, -Q1 breaker, -X1 terminal strip |
The letter comes from the symbol (or the part); the number is the next free one. Codes use Latin letters, digits and . or _.
A device takes the function and location of its page (or of the location box it stands in) unless you give it its own. Device tags in the project properties chooses how tags are shown: Short leaves out the = and + equal to the page, Full always shows them.
One device, several symbols
All symbols with the same tag are one device: the coil of -K1 and the contacts -K1 13-14 drawn on other pages. The symbol that stands for the device itself (coil, breaker, motor) is its main function; contacts are auxiliary functions.
- Under a coil the contact image lists its contacts with their designations and places (
13-14 /5.2). - Each contact shows where its coil is (
/2.4). - Select a symbol and press
F(Go to cross-reference) to jump to the other one; press again to go on.
The description of the device ("Pump 1 contactor") is shown under the tag of the main function and kept for the whole device. A long description goes on two or three lines, as wide as there is room beside the tag up to the next circuit (36 mm at most). When you change the tag of the main function, the description and the parts go with it.
The Devices tab
The Devices tab on the left lists the devices of the project by structure, with their functions:
- Functions of the device's part that are not drawn yet (e.g. the free contacts of a contactor, the channels of a PLC) wait there. Drag one onto the page to draw it, or double-click it.
- The New device button at the top of the tab creates a device from a part before anything of it is drawn.
- Terminals are folded under their strip.
- On panel pages the tab shows the devices not placed on the panel yet.
The Devices table at the bottom lists all devices with their parts and places.
Check project
Check project (Mod+Shift+K) looks for mistakes and lists them in the Messages tab: a device with two main functions, contacts without a coil, more contacts than the part has, a terminal number used twice, a cable with too few cores, PLC tags without an address, a device placed twice on the panel, a coil whose part is for another voltage than its circuit has (a 230 V AC contactor between +24V and 0V, or behind a 24 V DC output of a PLC), PLC channels drawn with the generic DI/DO/AI/AO symbols on a PLC whose part has channels of its own, an order number in a device's description that is not one of its parts, and more. Click a message to go to the place.
Wires the connection points do not take
A part from an EDZ package says what each of its connection points takes: the smallest and largest cross-section and how many wires (a terminal ST 2.5: 0.08–4 mm², one wire). The check reports a wire larger than the point takes and too many wires on one point as errors, a wire smaller than it takes as a warning, at all devices with such a part, not only terminals. A device wired in the middle of a chain of a potential (+24V from device to device) has two wires on its point; the chain avoids that where the part takes one (see wire lengths), and where it cannot, the message says so: bridge the terminals of the potential with a jumper, or use terminals with more clamps. A plug-in jumper between terminals does not count, a wire jumper and a cable core do. A terminal drawn with two points whose part has more clamps (TWIN, QUATTRO) takes on each point what the clamps of that side take together.
- The point of the part is found by its designation (
A1;1fits1/L1); else the value all points of the part share; else the part's connection cross-section as the largest. A device without a part, or a wire without a cross-section, is not checked. - You see it at once: when you set a cross-section or connect a wire that does not fit, the status bar says so; in the Connections table its cross-section is red (the problem shows on the cell); on the schematic the point gets a red circle (the problem shows when the pointer rests on it; not printed).