Mitsubishi Melsec PLC Data Address

Introduction

Data in Mitsubishi Melsec PLC Devices is stored different locations depending on the intended use of the data. For example:

The Mitsubishi Melsec PLC Data Address is a text string that defines the location of data in a Mitsubishi Melsec PLC Device.

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

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

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

In the IOItemName property of an I/O Analog Data Point Tag when the tag is associated with a Mitsubishi Melsec PLC.
In the IOItemName property of a I/O Digital Data Point Tag when the tag is associated with a Mitsubishi Melsec PLC.
In the IOItemName property of a I/O Word Data Point Tag when the tag is associated with a Mitsubishi Melsec PLC.
In the IOItemName property of a I/O Double Word Data Point Tag when the tag is associated with a Mitsubishi Melsec PLC.
In the IOItemName property of a I/O Long Word Data Point Tag when the tag is associated with a Mitsubishi Melsec PLC.
In the Address field of a Mitsubishi Melsec Register Block.
In the DataAddress parameter of the DirectWriteBit Tag Command when used with a Mitsubishi Melsec PLC.
In the DataAddress parameter of the DirectWriteWord Tag Command when used with a Mitsubishi Melsec PLC.

The Data Address Editor provides a convenient tool to build Mitsubishi Melsec Data Address strings.

To open the Data Address Editor, click the Browse button of the IOItemName or Address property:

To learn about Mitsubishi Melsec Register Block Tags.

For an overview of the Mitsubishi Melsec Driver.

For the meaning of terms used in Fernhill SCADA.