Where is the rich function of PLC reflected?

PLC Functions and Capabilities

2026 Industrial Intelligence Report

The rich functions of PLCs reflect in multiple dimensions—connectivity, control, and integration. Here's how.

Key Functional Areas

Control Functions

Discrete: On/off, binary control

Analog: Continuous control, PID

Motion: Integrated, servo, drives

Communication

Industrial Ethernet: Ethernet/IP, Profinet, EtherCAT

Fieldbus: Profibus, DeviceNet

Cloud: MQTT, OPC UA

Data Handling

Local storage: Recipes, parameters

Data logging: Historian, trends

Edge analytics: Local processing

Safety

E-stops: Safety stops

Safety I/O: SIL 2/3

Functional safety: IEC 61508

But here's what counts: functions reflect capability needs. Don't buy features you'll never use—match functions to requirements.

Functional Coverage

Function Capability 2026 Status
Basic control Digital I/O Standard
PID control Built-in PID Standard
Motion control Integrated motion Now common
Safety SIL rated Available
Edge analytics On-platform Growing

The richest function is not any specific capability—it's the ability to add capabilities. Modular expansion is the real power.

— Senior Controls Engineer

Function Deployment Path

Foundation
Digital I/O, basic control
Process
Analog, PID, drives
Motion
Integrated motion, robotics
Integration
Connect to enterprise
Pro-Tip: Start with requirements. Many applications need only foundation functions. Don't buy advanced functions if you don't need them.

We've seen unnecessary functions increase cost without increasing value. Match functions to needs.

FAQ

+What's the most used function?
Digital I/O—binary on/off control. 80% of applications.
+What's most underutilized?
Data functions. Most use only control functions. Data capabilities underused.
+What's coming next?
AI at the edge—on-platform analytics that adapt without cloud.

Need Function Assessment?

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