Inst ToolsInst ToolsInst Tools
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Search
  • Books
  • Software
  • Projects
  • Process
  • Tools
  • Basics
  • Formula
  • Power Plant
  • Root Cause Analysis
  • Electrical Basics
  • Animation
  • Standards
  • 4-20 mA Course
  • Siemens PLC Course
Reading: Peripheral Inputs and Outputs in Siemens PLC
Share
Notification Show More
Font ResizerAa
Inst ToolsInst Tools
Font ResizerAa
  • Courses
  • Design
  • PLC
  • Interview
  • Control System
Search
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Inst Tools > Blog > PLC Tutorials > Peripheral Inputs and Outputs in Siemens PLC

Peripheral Inputs and Outputs in Siemens PLC

In this article, we will learn about peripheral inputs and outputs in the Siemens programmable logic controller (PLC).

Last updated: March 4, 2021 11:20 am
Editorial Staff
PLC Tutorials
1 Comment
Share
3 Min Read
SHARE

In this article, we will learn about peripheral inputs and outputs in the Siemens PLC.

In my previous article, I covered the execution of the PLC program and gives an idea of PII and PIQ, which are small storage section in the CPU.

For digital input and output, logic action is stored to PII and PIQ to fasten cycle time.

But, for analog input and output, it directly takes value from the card itself. To recognize addresses of analog input and output, say PLC that not look at PII and PIQ instead, it will look at analog card directly so we need to use a peripheral address.

Peripheral Inputs and Outputs

Before writing any analog address to the programming you must have to add “P” before any analog address you choose.

For Simatic manager software above mentioned addressing method is used to recognize analog signals. For example, PIW100, PID100, PIQ200, etc.

For TIA PORTAL it accepts “P” after and before the address. For example, PIW100 or you can write IW100:P

Let take an example in both Simatic manager and TIA PORTAL to know more about peripheral addresses.

Step 1:

Open TIA PORTAL. Enter into a programming environment.

Now, let see what happened if we do not use a peripheral address.

I have added MOVE instruction with an address as you can see in the below window.

If I run a program, an error will occur and CPU goes to STOP mode, which you can see in the below window.

Peripheral Inputs and Outputs in Siemens PLC

Step 2:

To solve this issue we have to use the peripheral address to tell PLC to not look at PII and instead look at the analog cards.

Here, as you can see in the below window that I can use both address PIW and IW:P. Both addresses accept by TIA PORTAL.

If you put PIW as an address, it automatically changes to IW:P as it recognizes that this address belongs to the analog cards.

Siemens Peripheral Address

Step 3:

 For Simatic Manager, in the latest version if you won’t put “P” before address it won’t show you an error.

But it is good practice to use the peripheral address for analog addresses.

Siemens S7 PLC Simulator

The same works for analog outputs too.

I hope you may have a clear idea about the use of peripheral addresses in the PLC programming.

Author: Suhel Patel

If you liked this article, then please subscribe to our YouTube Channel for PLC and SCADA video tutorials.

You can also follow us on Facebook and Twitter to receive daily updates.

Read Next:

  • PLC Siemens Training
  • PLC Project Retrieve
  • PLC Program Motor Logic
  • RSLogix 500 PID Function
  • Process Control System
Don't Miss Our Updates
Be the first to get exclusive content straight to your email.
We promise not to spam you. You can unsubscribe at any time.
Invalid email address
You've successfully subscribed !

Continue Reading

What is SCADA System?
PLC Program for Water filling and Discharging Process
PLC Mixing Process with Adjustable Timer and Valve Control
Inside the PLC Control Panel: How Much Do You Know?
PLC Program for Fish Feeding System
Types of PLC
Share This Article
Facebook Whatsapp Whatsapp LinkedIn Copy Link
Share
1 Comment
  • EAO says:
    April 21, 2025 at 12:15 pm

    I saw a P&ID using the symbol PIW instead of AI for I/O. Why use PIW Peripheral Input Word (PIW) instead of Analog Input (AI)

    Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Stay Connected

128.3kFollowersLike
69.1kFollowersFollow
210kSubscribersSubscribe
38kFollowersFollow

Categories

Explore More

Do’s and Don’ts in PLC
Five Types of PLC Programming languages
Tia Portal – OB121 Programming Errors Interrupt Organization Block
Comparison of Proportional Integral Derivative Controllers (PID)
FactoryTalk View Studio – Import and Export Tutorial
Difference Between SCADA and HMI
Basics of PLC Programming
PLC Temperature Control using Pulse Width Modulation (PWM)

Keep Learning

PLC Programming Sequence Logic

PLC Programming to Control Lights in a Sequence

two-way communication between PLC systems

Transferring Data Across PLC Systems – TSEND_C and TRCV_C

Components of SCADA

Components of SCADA

Push button Motor PLC Logic

Push button Motor PLC Logic

Augmented Reality and Virtual Reality in Industrial Automation

Augmented Reality and Virtual Reality in Industrial Automation

Surge Protection Device

What is a Surge Protection Device? – Principle, Types, Advantages

Compare Servo Motor and Stepper Motor

Compare Servo Motor and Stepper Motor

Why Are Charcoal and Salt Added to an Earthing Pit

Why Are Charcoal and Salt Added to an Earthing Pit?

Learn More

Gas Detection Definitions

Standard Gas Detection Definitions

Calculate Hydrostatic Pressure of a vertical column of Acetic Acid

Hydrostatic Pressure of a vertical column of Acetic Acid

Calibration & Preventative Maintenance Procedures

Calibration and Preventative Maintenance Procedures

PID parameters

PID in Siemens TIA Portal

Sheet Metal Fabrication Manufacturing and Design

Ideal Guide To Sheet Metal Fabrication Manufacturing and Design

Digital Electronics Multiple Choice Questions

Random Access Memory Objective Questions – Part 2

Thermal Differential Level Measurement

What is Thermal Differential Level Measurement?

PN Junction Questions & Answers

Measurement and Instrumentation Objective Questions – Part 5

Menu

  • About
  • Privacy Policy
  • Copyright

Quick Links

  • Learn PLC
  • Helping Hand
  • Part Time Job

YouTube Subscribe

Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Welcome Back!

Sign in to your account

Username or Email Address
Password

Lost your password?