Complete Guide to Projector Centralized Control: Managing Multiple Projectors with Soft Control

Introduction

Projectors are among the most common display devices in exhibition halls, museums, and conference rooms. A medium-sized exhibition hall often has 5-20 projectors, and manually operating each one consumes significant time during daily opening and closing.

With a projector centralized control system, operators can control all projectors simultaneously with a single click - power on/off, input source switching, volume adjustment, and more.

This article provides detailed instructions on how to implement projector centralized control using SoftControl.

Common Projector Control Protocols

Projectors typically support the following control protocols:

1. RS232 Serial Control ⭐⭐⭐⭐⭐

The most commonly used and stable control method

Advantages:

• Fast response and accurate control

• Network-independent, highly stable

• Supported by almost all professional projectors

Disadvantages:

• Requires cabling, distance limitations (typically within 15m)

• Requires serial server or computer with serial port

2. PJLink Network Protocol ⭐⭐⭐⭐

Control projectors via local area network

Advantages:

• No additional cabling, uses existing network

• Can control large numbers of projectors simultaneously

• Supports status query (power status, error detection)

Disadvantages:

• Requires projector to support PJLink (most major brands do)

• Cannot control if network fails

3. Infrared Control ⭐⭐

Simulates remote control

How to Choose a Control Protocol?

SoftControl Projector Control Configuration Tutorial

Solution 1: RS232 Serial Control Configuration

#### Step 1: Confirm Projector Serial Parameters

Find the following information in the projector settings menu or user manual:

#### Step 2: Physical Connection

• Use a serial cable to connect to the projector's RS232 port

• If using USB to serial adapter, install driver and confirm COM port in Device Manager

• For distances over 15m, use an active serial extender

#### Step 3: Add Command in SoftControl

• Open SoftControl, enter Edit Mode

• In Command Management, click Add Command

• Configure projector power-on command:

``
Command Name: Projector1-PowerOn
Protocol Type: Serial (RS232)
Port: COM1
Baud Rate: 9600
Data Bits: 8
Stop Bits: 1
Parity: None
Command Content: (Projector command, e.g.: 02 50 57 31 03)
`

💡 Note: Projector serial command formats vary by brand. Common formats:

- Epson: PWR ON + carriage return

- Panasonic: 02 50 57 31 03 (hexadecimal)

- Sony: * 0 IR 001 + carriage return

- BenQ: * 0 IR 001 + carriage return

#### Step 4: Test Command

Click Send Test and observe if the projector responds. If not, check:


• COM port number is correct

`
Command Name: Projector1-PowerOff
Command Content: (Projector power-off command)
`

Solution 2: PJLink Network Control Configuration

#### Step 1: Confirm Projector Network Settings


• Note the IP address from projector network settings

`bash
ping 192.168.1.100
`

#### Step 3: Add Command in SoftControl


• Enter Edit Mode → Command Management

`
Command Name: Projector1-PowerOn
Protocol Type: TCP
Target Address: 192.168.1.100
Target Port: 4352
Command Content: %1POWR 1
`

PJLink Standard Commands:

Solution 3: Batch Control Multiple Projectors

#### Create Projector Group


• Configure individual power on/off commands for each projector

`
Scene Name: Opening-AllProjectors
Command List:


• Projector1-PowerOn (Delay 0s)

`
Scene: VideoWall-SwitchToHDMI1
Commands:


• Projector1-SwitchHDMI1

Solution:
Add sufficient delay in scene:
`


• Projector-PowerOff

PJLink Method:
Send query command %1POWR ?, projector returns:


• POWR=1 : Powered on

• POWR=0 : Powered off

• POWR=ERR : Error state

SoftControl Status Feedback:
Add status display component in scene to show real-time projector power status.

Q4: Serial cable distance insufficient?

Solutions:


• Use active serial extender (extend to 100m)