Mitsubishi Melsec PLC Data Address Format

Introduction

Data in Mitsubishi Melsec PLCs is stored different locations depending on the intended use of the data. For example there are separate locations for Inputs, Outputs, Timer Values, Data Registers and so on.

The Mitsubishi Melsec PLC Data Address Format is a string that defines the location of data in a Mitsubishi Melsec PLC. It consists of one or two device type letters, followed by either an octal, decimal or hexadecimal number:

Device Type Format Notes
Input Xhhhh For FX PLCs the offset value is octal
For A and Q-Series PLCs the offset value is hexadecimal
Output Yhhhh For FX PLCs the offset value is octal
For A and Q-Series PLCs the offset value is hexadecimal
Internal Relay Mnnnn
Step Relay Snnnn
Timer Contact TSnnn
Timer Coil TCnnn Not supported on FX PLCs.
Timer Value TNnnn
Counter Contact CSnnn
Counter Coil CCnnn Not supported on FX PLCs.
Counter Value CNnnn
Data Register Dnnnn
Annunciator Fnnnn Not supported on FX PLCs.
File Register Rnnnn Not supported on FX0, FX1 or FX2 PLCs.
Link Relay Bhhhh The offset value is hexadecimal.
Not supported on FX PLCs.
Link Register Whhhh The offset value is hexadecimal.
Not supported on FX PLCs.
Special Relay SMnnn Not supported on FX or A-Series PLCs.
Special Data Register SDnnn Not supported on FX or A-Series PLCs.

Note: The numbers in Mitsubishi Melsec PLC Data Address are zero-based.

Where Used

The Mitsubishi Melsec PLC Data Address Format is used in these contexts:

Data Address Editor

The Data Address Editor is accessed by clicking the Browse button Browse button found at the right hand side of the Address field:

Mitsubishi Melsec Address Editor

Further Information

Mitsubishi Melsec Register Block Tag

To learn about Mitsubishi Melsec Register Block Tags.

Mitsubishi Melsec Driver

For an overview of the Mitsubishi Melsec Driver.

Glossary

For the meaning of terms used in Fernhill SCADA.