How To Program Timers TON and TOF in PLC Logo!

The Timers of Software are control logic functions based in the Time (mainly in seconds), the most widely used are Timer On Delay "TON" and Timer Off Delay "TOF"

OFF

Simulation in Logo Soft Comfort of a Timer ON Delay (TON)

OFF

Simulation in Logo Soft Comfort of a Timer OFF Delay (TOF)

First, We must to know these concepts:

Timer On-Delay (TON): It's the time in seconds mainly, that start to count, after when get the defined value Activate the Output

Timer Off-Delay (TOF): It's the time in seconds mainly, when you press the start Activate the Output in a Time defined and after back to stop

Software Flag (Mx): Flags "M" are a types of Outputs-Contacts that allow create a lot of logical in our Software, Activate a Flag(M) Coil, means we can use it for a lot of instructions using his Open or Closed Contacts (M using in -||- or -|/|) For programmers, Flags mean create infinite style of programs and is one of the most importants things to consider

Control Elements: There are the elements of control that act in the proccess, these are Inputs elements like Emergency Stop, Start Buttons, Breakers, Fails, etc; and Output we have Contactors, relays, VFD, etc.

Must Knowledge

Industrial Command
Basic English
First Time PLC Logo!

MAIN SUMMARY
STEP 1: Necesary Elements
STEP 2: First Program Timers
STEP 3: We Program and Prepare to Simulate
STEP 4: Simulating our TON
STEP 5: Program a Timer Off Delay TOF
STEP 6: Simulating our TOF
STEP 7: Verify our Wire in PLC
STEP 8: Creating a Program with TON and TOf
STEP 9: Upload our Program to PLC Logo!
STEP 10: Question & Answers

STEP 1 : Go to Logo PLC Software

First, we must to need Hardware and Software to communicate a PLC

The Programmable Relay PLC Logo! need a Software to make the Program that control all our process, so we need these elemments:

Notebook or Portable Computer with CD-USB o CD
PLC Logo! V8 Siemens
Communication Cable Ethernet Cat5e o higher
Software PLC Logo Siemens; Logo Soft Comfort V8.0 or higher
Wiring in 220VAC (We use Logo! 220VAC)

NO problem if we dont have the Original CD, we can Download DEMO VERSION Here Download fast! from Siemens WebPage in "Demosoftware" if we have this demo, we may simulate and create a lot of control projects really perfect to practice

STEP 2: First Time using Timers

Program a Start / Stop to use Timer On Delay (TON)

Start to program in our Ladder enviroment a Start (I1), Stop (I2) and a TON (T00x) , all instructions are in a left of the screen, it means that when we "start" in a time "seconds" that we defined, the output will execute, you can use it for example to start motors in different time, so useful and easy to control

After we defined in our program do double click in our "timer block T00x" and configure the seconds for his activation; after we define the value T00x from our TON to a Open Contact created in our Software, Create open and closed contacts is an exellent way to have logics of control

VERY IMPORTANT:

Mainly the Timers WORK with Output Contacts (open and closed) in this case we use Open Contact and assigned T001 this contact will be activated when the Timer get the definited value

The Flag(Mark) M1 in this case is very useful because it will be the Coil that get energized the line after starts I1 and while is energized Timer T001 is working in the time

Before to create open or closed contacts from M1 or T001 , you must create this blocks, if aren't created it will not show to select in menú

STEP 8: Programming using TON and TOF

We create a simple program and understand fast how it workss

Click to see Video

SO IMPORTANT

We configure TON and a TOF with 3 seconds each one

The Timer TON will activate the Output after 3 Seconds ONLY if this is always energized

The Timer TOF will activate already after just push start and will off after assigned value 3s

Q1 and Q2 are independent Outputs in this case just for understand differences between TON and TOF

QUESTIONS AND ANSWERS

HERE IS ANSWERED YOUR QUESTIONS:

Where Can Download Logo Soft Comfort! The Software of PLC Logo? and Buy Original CD?
For the Version DEMO go to Siemens Webpage here or you try in the above external links of Step 2 Here; It Costs around 70 USD (without upgrades) and you can get it in a external company Buy in Automation24 this software may be installed in many computers

Do Timers TON and TOF use same programmation?
NO, how we see in steps above, Timer On Delay (TON) work with "always energized" block GO STEP 2 ; The Timer Off Delay (TOF) Works only with a "push" GO STEP 6

How we activate a Output in a Timer?
First you need your block TON or TOF ; the Output will activate when the Timer Block reach his value; and you must take a Open Contact in the Side and add the Name of Timer (T00x), you can see STEP 2

Why Can't Connect with my PLC Logo?
The Communication with PLC Logo! is by ETHERNET (TCP/IP); you should change your Sub-network number in your computer, remember Logo! comes with 192.168.1.x or 192.168.0.x must to try with both options

ElectricalChile

Profiter L'Ingénierie

How To Program Timers TON and TOF in PLC Logo!

The Timers of Software are control logic functions based in the Time (mainly in seconds), the most widely used are Timer On Delay "TON" and Timer Off Delay "TOF"