6.7 Meaning of "Tools" icons
SYSWIN has several types of editors among whom a relay diagram also known as relay editor, or first editor that awaits us upon starting a SYSWIN program is the most frequently used editor.
First we need to explain tools palette (Drawing Tools) and the meaning of each icon. Aside through the usual mouse click, you can access the specific elements of this palette from a keyboard. You'll find a corresponding key of the keyboard by each icon, and you can accomplish the same action with it as you would using a mouse.
By clicking on the icon, we have selected a desired tool, and with a click on network section this symbol will be stored in a program. Explanation for each of the icons is given as follows:
Open contact icon. By clicking on this icon (or using a key '"') we enter an open contact into Network. We need to position the element we have entered at a specified place (black space). Following this, a message window where data can be entered (open contact address-number of words, bit position) is activated automatically.
Closed contact icon. By clicking on this icon (or '/' on keyboard) we enter a closed contact or inverted condition into network.
Horizontal line. By clicking on this icon (or using '-' on a keyboard), horizontal line is lengthened out from left to right. SYSWIN, however, retains a right to make drawn lines optimal in terms of length, or to point out possible errors. This option is used when you need to add another condition before an instruction contingent upon this condition, or when something simply can not fit.
Vertical line. With a click on this icon, or use of '?', we draw vertical lines from top to bottom. This option is necessary to realize parallel connections between contacts.
Output instruction. This represents an instruction that is executed if condition instruction preceding it is executed. With the help of this instruction we advance a result of logical expression with output variables (bits). We can arrive to this instruction with the help of keyboard ('O' key).
Inverted output instruction (shortcut-key 'Q'). Similarly to the previous case, with this executing instruction we advance a result of logical expression to an output bit, and the only difference is that this bit is turned on if a condition is not executed and vice versa.
PLC functions (shortcut-key 'F'). Click on this icon accomplishes possibility of installment of complex PLC instructions into a program. Window that appears following a click on the icon contains all instructions sorted by sections. Some of these instructions are given separately as icons, and some can be accessed only through this option. One such instruction is END instruction which is used in each program. Window that comes up is displayed in the following picture.
When this window pops up, select an instruction and click on OK.
Click on this icon (or using 'T' key) will give you an option to enter a timer into the program. Using a mouse, click on the bright area of the monitor, and a message window comes up where you can enter needed information relating to a timer (timer designation and duration in milliseconds). This way, we get a classic timer or timer with a delay when turned on. If some other version of a timer is needed, preceding FUN icon should be used, and option Timers and counters (see picture above) selected.
Counter icon. Click on this icon (or 'C' key), and this will install a classic counter into a PLC program. Prior to this we enter needed information in message window: designation of the counter (CNT001 for instance) and counter value. Change of counter status (decrementing by 1) is done when an input signal (CP) changes from OFF to ON status.
With this icon we can invert previously entered contact, output or input. Inversion is done so that we first click on this icon, and then on a variable whose inversion we wish to perform.
Erase icon. Click on this icon and a shaded area of network erases the shaded part of the program.
Mouse plays an important part in the SYSWIN program. Each double-click on any PLC instruction results in a corresponding editor where necessary changes can be entered. This principle is accordingly installed into SYSWIN, so double-click on block or network heading (BLOCK HEADER BAR or NETWORK HEADER BAR) gives the same results.
