2.6 MELSEC-FX

1

The device ranges that can be set when selecting [MELSEC-FX] as the controller type are as follows.

 

Device name

Setting range

Device No.

 

representation

 

 

 

 

 

 

Input relay (X)

X0

to

X377

Octal

 

 

 

 

 

 

Output relay (Y)

Y0

to

Y377

 

 

 

 

 

 

 

 

 

Auxiliary relay (M)

M0

to

M7679

 

 

 

 

 

 

 

device

Special auxiliary relay (M)

M8000

to

M8511

 

 

 

 

 

Decimal

State (S)

S0

to

S4095

 

 

 

 

 

Timer contact (T)

T0

to

T511

 

Bit

 

 

 

 

 

Counter contact (C)

C0

to

C255

 

 

 

 

 

 

 

Specified bit of the

 

 

Word device bit*1

following word devices

―

 

(Except Timer (set value)

 

 

 

 

 

and Counter (set value))

 

 

 

 

 

 

 

 

Data register (D)

D0

to

D0999

 

 

File register (D)

D1000

to

D7999

 

 

 

 

 

 

 

 

Special data register (D)

D8000

to

D8511

 

 

 

 

 

 

 

 

Timer (current value) (T)

T0

to

T511

 

 

 

 

 

 

 

 

Counter (current value)

C0

to

C255

 

 

(C)

 

 

 

 

 

 

 

 

 

 

 

 

device

Timer (set value) (TS)*3*5

TS0

to

TS511

 

Counter (set value)

CS0

to

CS255

 

(CS)*4*5

Decimal

 

 

 

Word

 

 

 

 

 

Extension register (R)

R0

to

R32767

 

 

 

 

 

 

 

Index register (V)

V0

to

V7

 

 

 

 

 

 

 

 

Index register (Z)

Z0

to

Z7

 

 

 

 

 

 

 

 

Buffer memory (BM)*7

BM0

to

BM32767

 

 

 

Converting the above bit

 

 

Bit device word*2*6

devices into words

 

 

(Except Timer contact

 

 

 

 

 

 

and Counter contact)

 

 

 

 

 

 

 

*1 When executing the touch switch function set during the bit specification of the word device, do not write any data to the word device through the sequence program.

*2 The device No. must be set in multiples of 16.

*3 Only 16-bit (1-word) designation is allowed.

*4 For CS0 to CS199, only 16-bit (1-word) designation is allowed.

For CS200 to CS255, only 32-bit (2-word) designation is allowed.

*5 Monitoring or writing is not possible in the continuous device designation mode.

In addition, setting values of the timer and counter, which are not used for the program, cannot be monitored. If monitoring is executed, a reading error occurs.

*6 This is not supported by GT10.

*7 Can be used only for special blocks or special units compatible with FX1N, FX1NC, FX2N, FX2NC, FX3G, FX3GC, FX3U, FX3UC.

(Except FX0N-3A, FX2N-2AD, and FX2N-2DA)

POINT

If using the 16 bit specification for a buffer memory of 32 bit data, monitoring and writing may not be executed normally.

For the data size of each buffer memory, refer to the following.

User's Manual of the special block or special module

•When reading from/writing to the special block or special module by interrupt processing of the sequence program, monitoring/writing from GOT to the buffer memory may not be executed normally.

(2)How to select a keyword protection level

For equipment that are allowed to operate the FX PLC online, 3 levels of protection level can be set. When monitoring or changing settings by any online equipment is required, set a keyword referring to the following.

(a)When setting the keyword only

Select a protection level by the initial letter of the keyword.

All operation protect: Set a keyword with the initial letter "A", "D" to "F", or "0" to "9". Incorrect write/read protect: Set a keyword with the initial letter "B".

Incorrect write protect: Set a keyword with the initial letter "C".

(b)When setting the keyword and 2nd keyword Select a protection level by [Registration condition].

(3)Monitoring availability at each keyword protection level

The following shows the device monitoring availability at each keyword protection level.

 

 

When registering the

When registering the

Keyword

 

 

keyword and 2nd

 

 

keyword only

not

 

 

keyword

 

 

 

 

 

 

 

registered

Item

 

Incorrect

 

 

 

 

All

Incorrect

All online

Read/

Write

or

 

 

operation

write/

write

operation

write

protection

 

 

read

protect

 

 

protect

protect

protect

protect

cancelled

 

 

 

protect

 

 

 

 

 

Monitoring

 

 

 

 

 

 

 

devices

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T, C set

 

 

 

 

 

 

 

 

value

 

 

 

 

 

 

 

 

and file

*1

*1

*1

 

 

 

 

 

register

 

 

 

 

Changing

(D1000

 

 

 

 

 

 

 

devices

and the

 

 

 

 

 

 

 

 

following)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Other

 

 

 

 

 

 

 

 

than

 

 

 

 

 

 

 

 

above

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*1 When the T, C set values are specified indirectly, changing devices is available.

PREPARATORYFORPROCEDURESMONITORING 2

RANGESETBE

DEVICE CANTHAT 3

RANGEACCESS MONITORINGFOR 4

MONITORTOREDUNTANTSYSTEM HOW 5

CONNECTIONBUS 6

DIRECTTOCONNECTIONCPU 7

LINK

(1)Precautions when using the buffer memory

•When the power supply of the special block or special module is turned off, the contents of the buffer memory are initialized, except for some keeping areas.

•When the buffer memory is monitored by the GOT, the PLC scan time may increase instantly.

•Use the 16 bit specification for the buffer memory of 16 bit data. Use the 32 bit specification for the buffer memory of 32 bit data.

(4)Difference between all online operations prohibition and all operations prohibition

When specifying all online operations prohibition, displaying devices and inputting data with programming tools or GOT are all prohibited. When all operations are prohibited, displaying devices and inputting data with the GOT are enabled while all operations using programming tools are prohibited.

COMPUTER CONNECTION 8

ETHERNETCONNECTION

2. DEVICE RANGE THAT CAN BE SET

2 - 13

2.6 MELSEC-FX