Programming Analog Outputs in 0-10 Volts PLC Logo! Siemens

The Analog Outputs are values of parameters mainly electricals that the PLC works with a Load or Actuator powered in Current 4-20mA or a good option in Voltage 0-10V, the Software Value Logo is configured and scaled in a Output Voltage/Current Value

OFF=> 0 =>0V

Simulating Analog Input in Software Value 0-1000 to 0-10 Volts

First, We must to know these concepts:

Output AQ in (mA): are the Analog Outputs that work with current ranges, these are 4-20mA and 0-20mA, Actuator must to be compatible with these Current Output

Output AQ in (Volts): are Analog Outputs that work with Voltages ranges, mainly 0-10V, sometimes the Voltage 0 10V Output is most used, It's easy to measure and you can find more compatible devices

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

Proportional Actuators: These are Electromechanical devices that are part of the process and can regule flow in %, Valves or Actuators open or closed in % depending Value of Volts or mA from the Analog Outputs Module of the PLC, it means less or more flow depending % that you regule by Analog Outputs

Must Knowledge

Industrial Command
Computation
Electricity
Basic English
First Time with Logo!

MAIN SUMMARY
STEP 1: Necessary Elements
STEP 2: Analog Outputs Types
STEP 3: Necessary Hardware for AQ/AO
STEP 4: Wiring and Technical Details
STEP 5: Programming PLC (include Video too)
STEP 6: Upload Program to Logo!
STEP 7: QUESTIONS & ANSWERS

STEP 1 : NECESSARY ELEMENTS

First we must to have all components and PLC in LADDER

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: ANALOG INPUT TYPES

First les't know all about Analog AQ/AO

Analog Outputs are signals (electrical parameters) that with a configuration in PLC it powers with Voltage or Current and make works "Proportional Actuators", in Engineering, Proportional may means "Energy Efficiency"
Hay 3 tipos importantes:

0-10V: It Signal may works as the most useful Analog Output, this for his easy measure and understand, also more actuators are compatible, the Voltage range are 0 to 10V, you can verify signal with a simple instrument as "Tester" you only need to be capable to measure VDC

4-20mA: Analog Current Signal in mA, the module AM2-AQ2 allow Input Current too (YES, same module can be used to Volts or mA), sometimes the Current is most used in Analog Inputs (AI) than in Outputs (AQ)

0-20mA: Analog Current Signal mA, the module AM2-AQ2 allow Input Current too; now is important verify if the Actuator may works with this signal

In All Softwares the Analog Values in Hardware/Software work in a Linear Function

STEP 3: Necessary HARDWARE AQ

Let's see in details elements to work with Analog Outputs

These are the most necessary elements to start to work with Analog Outputs, remember too all projects are differents

IDENTIFY:

CPU PLC Logo! 220VAC (in this case)
Expansion Module AM2-AQ Watch Model
Switching Power Supply 220VAC / 24 VDC
Proportional Actuator
Shielded Cable +4xCables 1.0mm2

VERY IMPORTANT

The expansion analog outputs modules (AQ) almost always are powered by 24VDC

Most Actuators are almost always powered in 24VDC or 24VAC

We recommend Shielded Cable to wire signals 0-10V or in mA

Proportional Actuators can have 3 or 4 wires, more wire are for more technology

STEP 4: Wire & Technical Details

Para trabajar con Salidas Analógicas debemos conocer nuestro Proceso

For this simple example gonna configure 2 Digital Outputs (DI), START and STOP, and will activate an Analog Output, our Proportional Actuator works with 0-10V, the most important now is how the Analog Outputs work in Software, Hardware and Actuator

Choose this Proportional Actuator 0-10V

Now begin to take note of all technical specifications of our Actuator:

Actuator Type: Proportional Valve
Work Range: 0-10V (just in this case 2-10 Volts)
Wire N°: For 0-10V; 3 Wires, 24 VDC (+ and -) and the Voltage Line AQ (V+)
Power Supply: 24VDC, this valvule has power supply, not the same that 0-10V
Feedback Output U: Don't use in this case, this is the signal that Out from Actuator and measure "position", Output voltage (from valve) 0-10V and to read it you need to work in mode "PLC Analog Inputs"
Why appear 2-10 Volts?: Mainly to maintin with Voltage the valve (recommended from factory), but don't worry, the form to scale and understand is the same, this means that 2V is same "0%" in Actuator (Always is important make test in field)

Next you must to be so clear in how wire between PLC (AQ Module) and Proportional actuator, remember the signal we use in this example is 0-10 Volts; Current has other wire (see images)

What can we say about the wire:

Consider power supply 24VDC and Voltage Line (+) (3 wires, not bad idea consider a Ground)

Take Note, in others sensor don't scary but you should need other (-) together the U1+ wire from the Module AQ

Consider I1 Start / I2 Stop

STEP 5: Programming PLC LOGO!

The wire and technical details are OK, let's program in Software Logo

Access to Logo Soft Comfort and start to create the program with follow blocks:

Add block and before to Configure let's Know what means each one:

I1 - I2 - M1 Create and configure a START (I1) and STOP (I2), the retention will be by a FLAG "M1", this FLAG will activate the MUX

SF003 This block is called Multiplexor and the function is get Digital Inputs (0-1) and create a Output in a "Software Value" (0-1000 Software => 0-10 Volts) all is friendly configurable by the Users

SF003 (Analog Contact) This is the value configurated from the Multiplexor; in this case the Ouput will be 1000, that in Hardware it means 10 Volts

AQ1 This is Analog Ouput from the Module Hardware AM2-AQ; AQ1 for the number should be connected in Channel 1, as is connected in the Drawing, value in AQ1 is the value than Actuator will get

SF004: The create an Analog Amplifier to Scale the Value 0-1000 in a new Value to get a Volts scaled value, in the block create 0 10 and select "Sensor 0-10V", this value coms from SF003 (Analog MUX)

To Learn Better we recommend to visit Programming First Time a PLC Logo! CLICK before understand better Analog Inputs

Now let's configure our Analogic MUX, is very important understand how MUX works

Value from Analog MUX is the value to work with Analog Outputs (most simple way), remember the Analog Outputs not have relation in how to scale and work with Digital Outputs (are differents)
Work with Analog Outputs in a simple project is easy and friendly, more complex projects work with PID

After in "Parallel form" gonna create a Block ANALOG AMPLIFIER and Scale the Output MUX Value (1000, we use it to verify the real volts value in AQ1)

The AQ1 Value is the value that works directly over the Actuator

Amplifier in Parallel is only for verify Output Signal

We recommend you always use Simulator SIM

But Actuator technical information shows 2-10 VDC, how can configure Output to have 2 Volts always without press any button?

Very important know how Analog MUX Works

En: If this Input is not energized, configurations won't work

Activate directly "En": this take value from S1=0 y S2=0; so we go to configure 200 in MUX, 200 is same that Volts; this is the work range of "This Actuator"

S1: Input Pulse N°1 from block MUX

S2: Input Pulse N°2 from block MUX

Analog MUX may have "4" configurations and Output Options, all depends if S1 or S2 are activated, you can configure 4 differents Output Voltage Values (just because in this level we are beginner will work with 0-1000)

VIDEO Simulating Analog Outputs 0 -10 VOLTS

Simulate Yourserlf and analyze how it works in PLC (Analog Outputs)

OFF=> 0 =>0V

Simulating Analog Value "0-1000" in 0-10 Volts

Now simulate Software value "500"

OFF=> 0 =>0V

Simulating Analog Value "500" in 0-10 Volts

QUESTIONS & ANSWERS

HERE THE ANSWERS MOST IMPORTANTS:

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

Which are most used Analog Outputs in Automation and Control Systems?
Most used are 0-10V ; 4-20mA ; 0-20mA ; to see technical details of each one GO STEP 2 HERE

Why signal 0-10V is very used in Analog Ouputs?
Mainly by compatible devices and to have the posibility of measure the signal only with a Instrument that measure VDC, easy to verify if hardware is work correctly

How Measure the Voltage Output 0 10 Volts?
Between the Terminal Blocks U1+ and M1 in the AQ Module, you can measure and verify without connect the Actuator, you need to get wired the M1, with a instrument in M1 and other in U1+ you can verify the Output Volts in the AQ Module

How Begin to Understand Analog Outputs in a PLC?
At the first you can find it a little complex because are working with "Softwares and Hardwares", but really is just transform a PLC Order in a Software Value (0-1000) and then in a Voltage Value (0-10 Volts), this Voltage open or closed in % a Proportional Actuator, Let's analyze:
1. Know about Proportional Actuator to Use (0-10V or 4-20mA or 0-20mA)
2. Define what parameter will use how Analog Output (V o mA)
3. Configure in PLC how we "Activate" the Actuator (Pushbuttons or Automatically)
4. PLC and Expansion Modules, in this case AM2-AQ
5. Scale the values and use Amplifier to Verify (0-1000 and 0-10V)
6. Right Connections and Wire

How am I Sure the connection and wire between PLC and Actuator is right?
First Power PLC with right Voltage, then 2AQ Module and Actuator are powered by 24 VDC in almost all cases; then is important review again the technical details of Actuator, not all are the same, identiy when you must to connect Voltage or Current Signal, and then verify your Voltage Output from Module AQ with a VDC measure instrument without connect to the Load, if you have the right parameters, we are ready to work!

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, remember review IP in Logo NETWORK => IP ADDRESS

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Programming Analog Outputs in 0-10 Volts PLC Logo! Siemens

The Analog Outputs are values of parameters mainly electricals that the PLC works with a Load or Actuator powered in Current 4-20mA or a good option in Voltage 0-10V, the Software Value Logo is configured and scaled in a Output Voltage/Current Value