# Offset of address in PLC siemens

**URL:** <https://forum.inductiveautomation.com/t/offset-of-address-in-plc-siemens/21174>\
**Category:** Ignition\
**Created:** [December 1, 2018, 2:08am UTC](https://forum.inductiveautomation.com/t/offset-of-address-in-plc-siemens/21174 "2018-12-01T02:08:20Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![dang-nh](https://avatars.discourse-cdn.com/v4/letter/d/ecc23a/32.png) [@dang-nh](https://forum.inductiveautomation.com/u/dang-nh)\
**Post date:** [December 1, 2018, 2:08am UTC](https://forum.inductiveautomation.com/t/offset-of-address-in-plc-siemens/21174/1 "2018-12-01T02:08:20Z")

</div>

i just still learning Ignition, please help me explain what’s offset mean? anyone can help me explain clearly about offset  
thanks everyone alot

---

<div class="post-metadata">

**Author:** ![zxcslo](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/zxcslo/32/61610_2.png) [@zxcslo](https://forum.inductiveautomation.com/u/zxcslo)\
**Post date:** [December 1, 2018, 5:38am UTC](https://forum.inductiveautomation.com/t/offset-of-address-in-plc-siemens/21174/2 "2018-12-01T05:38:43Z")

</div>

## Address = 100.0 Offset = 3 Address = Address + Offset

(new) Address = 103.0

---

<div class="post-metadata">

**Author:** ![dang-nh](https://avatars.discourse-cdn.com/v4/letter/d/ecc23a/32.png) [@dang-nh](https://forum.inductiveautomation.com/u/dang-nh)\
**Post date:** [December 1, 2018, 6:24am UTC](https://forum.inductiveautomation.com/t/offset-of-address-in-plc-siemens/21174/3 "2018-12-01T06:24:58Z")

</div>

offset when i call a Input or output in PLC siemens, like IX3.2 i don’t understand offset what to do

---

<div class="post-metadata">

**Author:** ![zxcslo](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/zxcslo/32/61610_2.png) [@zxcslo](https://forum.inductiveautomation.com/u/zxcslo)\
**Post date:** [December 1, 2018, 6:55am UTC](https://forum.inductiveautomation.com/t/offset-of-address-in-plc-siemens/21174/4 "2018-12-01T06:55:42Z")

</div>

Offset is just a ‘fancy’ word for how much the address is off from the base (0 - zero) address…  
If you have address for Input (in Siemens) like I0.0 then input 10.0 is at offset 10.

Like from Ignition manual:

```auto
IX20.3	Bit 3 of the Byte at Offset 20 in the Inputs area

```

It’s just Input at address 20 bit 3 - IX20.3

---

<div class="post-metadata">

**Author:** ![dang-nh](https://avatars.discourse-cdn.com/v4/letter/d/ecc23a/32.png) [@dang-nh](https://forum.inductiveautomation.com/u/dang-nh)\
**Post date:** [December 3, 2018, 6:28am UTC](https://forum.inductiveautomation.com/t/offset-of-address-in-plc-siemens/21174/5 "2018-12-03T06:28:18Z")

</div>

0ffset just address to make you remember the localtion of byte or word, right ???  
thanks u alot