# Shift Register Ladder Diagram

**URL:** <https://forumautomation.com/t/shift-register-ladder-diagram/12884>\
**Category:** PLC (Programmable Logic Controllers)\
**Tags:** plc\
**Created:** [December 6, 2024, 2:30am UTC](https://forumautomation.com/t/shift-register-ladder-diagram/12884 "2024-12-06T02:30:57Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Rabert](https://forumautomation.com/user_avatar/forumautomation.com/rabert/32/6784_2.png) [@Rabert](https://forumautomation.com/u/Rabert)\
**Post date:** [December 6, 2024, 2:30am UTC](https://forumautomation.com/t/shift-register-ladder-diagram/12884/1 "2024-12-06T02:30:57Z")

</div>

> # Reset (Rung 1)

- **Contact:** Reset button (RB)
- **Coil:** Shift Register Reset (SRR)

> # Load (Rung 2)

- **Contact:** Load button (LB)

- **Coil:** Shift Register Load (SRL)

> # Shift (Rung 3)

- **Contact:** Shift button (SB)

- **Coil:** Shift Register Shift (SRS)

> # Data (Rung 4)

- **Contact:** Data input (DI)

- **Coil:** Shift Register Data (SRD)

![1726511042494](https://cdn.forumautomation.com/original/2X/7/7882afb8183be93a61d7015aae2c01b8ecde92ab.gif)

> # How it works?

> ## Reset

When you push the reset button, the shift register is cleared.

> ## Load

When press the load button loads data into shift register.

> ## Shift

When the shift button is pressed, data in the shift register moves one bit to the right (or left).

> ## Data

The data output coil receives the shift register’s data output.

> # Solved Example

Let’s say we wish to move a 4-bit binary number (1010) to the right by one bit. The following is how the ladder diagram should operate:

**Reset: Clear the shift register (0000)**

**Load: Load the data input (1010) into the shift register**

**Shift: Shift the data one bit to the right (0101)**

**Data: The output data is now (0101)**