Premium/Quantum Series

Modbus TCP Master

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Premium/Quantum Series

Device Address Specification

Device	Bit Address	Word address	32 bits	Remarks
Coil	000001 - 065536	000001 - 065521	or ^*1
Discrete Input	100001 - 165536	100001 - 165521		^*2
Input Register	------	300001 - 365536		^*2
Holding Register	400001,0 - 465536,15	400001 - 465536

*1 You can set the data storing order in 32-bit data word units and 64-bit data double-word units in the Device Setting dialog box.

*2 Write disabled.

IEC variable address range

The following table lists the equipment variable address range if you have selected the IEC61131 Syntax

Device	Bit Address	Word address	32 bits	Remarks
%I	%I000.000.000 - %I255.255.255	------		^2 ^3
%IW	%IW000.000.000:X00 - %IW255.255.255:X15	%IW000.000.000 - %IW255.255.255		^2 3
%KW	%KW00000:X00 - %KW65535:X15	%KW00000 - %KW65535	or ^*1	^*2
%MD	------	%MD00000 - %MD65534
%MF	------	%MF00000 - %MF65534
%M	%M00000 - %M65535	------
%MW	%MW00000:X00 - %MW65535:X15	%MW00000 - %MW65535
%Q	%Q000.000.000 - %Q255.255.255	------		^*4
%QW	%QW000.000.000:X00 - %QW255.255.255:X15	%QW000.000.000 - %QW255.255.255		^*4
%S	%S000 - %S000	------		^5 ^6
%SW	%SW000:X00 - %SW999:X15	%SW000 - %SW999

^*1You can set the data storing order in 32-bit data word units and 64-bit data double-word units in the Device Setting dialog box.

^*2Write disable

^*3For input addresses, such as %Ir.m.c, %IWr.m.c, or %IWr.m.c:Xj, with a minimum of two and a maximum of three segments. Each segment identifies a physical rack, module, and channel as necessary, for the associated I/O.

^*4For output addresses, such as %Qr.m.c, %QWr.m.c, or %QWr.m.c:Xj, with a minimum of two and a maximum of three segments. Each segment identifies a physical rack, module, and channel as necessary, for the associated I/O.

^*5Read/Write, depending on the bit/word number.

^*6To fit with equipment variable coding, the most significant byte could be chosen by the software.

NOTE

When you write to %IWr.m.c:Xj or %QWr.m.c:Xj variables, the Display reads the entire word, sets the defined bit, then returns the new word value to the External Device. If the ladder program writes data to this word address during the bit read/write process, the resulting data may be incorrect.
%I and %Q (and their W variants) are not supported for Quantum.
When the [Base Address] check box is selected for a 8-bit data type array or structure, and a %MW or %KW address is specified as the device address, the bottom byte and top byte of consecutive addresses is allocated to each element.
Example: BYTE type array Var1
Var1[0]...%MW1:X0
Var1[1]...%MW1:X8
Var1[2]...%MW2:X0

IEC equivalents

The following table gives the equivalents between the Modbus syntax and the IEC61131 syntax.

Device	MODBUS Syntax			IEC61131 Syntax
	MODBUS Syntax			Format	0 start		1 start
	Format	Range	First element	Format	Range	First element	Range	First element
Coil	000001+i	i = 0 to 65535	000001	%Mi	i = 0 to 65535	%M0	i = 1 to 65536	%M1
Discrete Input	100001+i	i = 0 to 65535	100001	-	-	-	-	-
Input Register (Word)	300001+i	i = 0 to 65535	300001	-	-	-	-	-
Input Register (Word bit)	300001+i,j	i = 0 to 65535 j = 0 to 15	300001,00	-	-	-	-	-
Holding Register (Word)	400001+i	i = 0 to 65535	400001	%MWi	i = 0 to 65535	%MW0	i = 1 to 65536	%MW1
Holding Register (Word bit)	400001+i,j	i = 0 to 65535 j = 0 to 15	400001,00	%Mwi:Xj	i = 0 to 65535 j=0 to 15	%MW0:X0	i = 1 to 65535 j=0 to 15	%MW1:X0

NOTE

The addresses 100000 and 300000 cannot be accessed using IEC61131 syntax.
If you apply IEC61131 syntax to a project that has a discrete input or input register already set, the addresses become invalid.

IEC61131 Syntax Address Mapping

Address mapping in BLUE is as follows. %MD and %MF use two sequential words form the specified address. The %KW, %KD, and %KF are mapped similarly.

Symbol Specification

You can import symbol data from the project created by your programming software.

Device		Bit Address	Word Address	32 bit	Notes
BOOL EBOOL	Single	<SYMNAME>	-	-	^1 ^2
	1D Array	<SYMNAME>[xl] - <SYMNAME>[xh]
	2D Array	<SYMMNAME>[xl,yl] - <SYMNAME>[xh,yh]
	3D Array	<SYMNAME>[xl,yl,zl] - <SYMNAME>[xh,yh,zh]
BYTE	Single	-	<SYMNAME>		^1 ^2
	1D Array		<SYMNAME>[xl] - <SYMNAME>[xh]
	2D Array		<SYMNAME>[xl,yl] - <SYMNAME>[xh,yh]
	3D Array		<SYMNAME>[xl,yl,zl] - <SYMNAME>[xh,yh,zh]
INT UINT WORD	Single	-	<SYMNAME>		^1 2
	1D Array		<SYMNAME>[xl] - <SYMNAME>[xh]
	2D Array		<SYMNAME>[xl,yl] - <SYMNAME>[xh,yh]
	3D Array		<SYMNAME>[xl,yl,zl] - <SYMNAME>[xh,yh,zh]
DINT UDINT DWORD	Single	-	<SYMNAME>		^1 2
	1D Array		<SYMNAME>[xl] - <SYMNAME>[xh]
	2D Array		<SYMNAME>[xl,yl] - <SYMNAME>[xh,yh]
	3D Array		<SYMNAME>[xl,yl,zl] - <SYMNAME>[xh,yh,zh]
REAL TIME	Single	-	<SYMNAME>		^1 2
	1D Array		<SYMNAME>[xl] - <SYMNAME>[xh]
	2D Array		<SYMNAME>[xl,yl] - <SYMNAME>[xh,yh]
	3D Array		<SYMNAME>[xl,yl,zl] - <SYMNAME>[xh,yh,zh]
STRING	Single	-	<SYMNAME>	-	^1 2
	1D Array		<SYMNAME>[xl] - <SYMNAME>[xh]
	2D Array		<SYMNAME>[xl,yl] - <SYMNAME>[xh,yh]
	3D Array		<SYMNAME>[xl,yl,zl] - <SYMNAME>[xh,yh,zh]
LWORD	Single	-	<SYMNAME>	-	^1 2
	1D Array		<SYMNAME>[xl] - <SYMNAME>[xh]
	2D Array		<SYMNAME>[xl,yl] - <SYMNAME>[xh,yh]
	3D Array		<SYMNAME>[xl,yl,zl] - <SYMNAME>[xh,yh,zh]

*1 <SYMNAME>: When referring to structures, the Symbol Name includes the structure name. The maximum number of characters for the Symbol Name is 255, which includes delimiters and elements.
Example)
    BOOL type single symbol    "BOOLSYMBOL"
    BOOL type 1D Array    "BOOL1D[10]
    WORD type 2D Array    "WORD2D[10,10]
    UDINT type 3D Array    "UDINT3D[0,1,2]
    STRING in User Defined Structure [STRUCT001]    "STRUCT001.STRINGSYM"

*2 The number of elements for each dimension is shown from "l" (the first number of the elements) to "h" (the last number of elements).

NOTE

Import EcoStruxure Control Expert (former Unity Pro) XVM file for using elements of array, structure and function block. These elements of the XSY file are not supported by BLUE.
If you use unlocated variables, import a XVM file. Unlocated variables cannot be imported by a XSY file.
User-defined Function Blocks cannot be imported.
When using symbol data in BLUE, in the [Properties] window of the equipment, set [String Mode] to [Little Endian].
For symbol import procedures, see the following.
Importing Symbols from External Devices

Supported Function Codes

The supported function code list is shown below.

Function Code (Hex)	Description
FC01(0x01)	Read the ON/OFF status of the slave coil (0X).
FC02(0x02)	Read the ON/OFF status of the slave discrete input (1X).
FC03(0x03)	Read the description of the slave holding register (4X).
FC04(0x04)	Read the description of the slave input register (3X).
FC05(0x05)	Change (Write) the slave coil (0X) status to either ON or OFF.
FC06(0x06)	Change (write) the description of the slave holding register (4X).
FC15(0x0F)	Change (Write) the slave consecutive multiple coils (0X) status to either ON or OFF.
FC16(0x10)	Change (write) the descriptions of the slave consecutive multiple holding registers (4X).

NOTE

FC15/FC16 are used for writing. FC05/FC06 are used for the External Devices that do not support the function codes mentioned on the left.

NOTE

Please refer to the precautions on manual notation for icons in the table.
Supported Devices Symbol and Terms