Mitsubishi Electronics FX3G User Manual

700

/FX

3GC

/FX

3UC

Series

Programming Manual - Basic & Applied Instruction Edition

30 External Device Communication – FNC270 to FNC276

30.7 FNC276 - MODBUS Read/Write Instruction

*1.

This calculation formula is applicable when the applicable device is D or R.

11H
Report Slave ID
(Available only
in FX

and

3UC

PLCs.)

0 (fixed)

PLC Destination Device (head address)

: Slave ID
+1: RUN/STOP State

Applicable Devices D•R

Block Length

2 Point

16H
Mask Write
Register
(Available only
in FX

and

3UC

PLCs.)

MODBUS Address:

0000H~FFFFH

AND Mask:

0000H~FFFFH

OR Mask: 0000H~FFFFH

Applicable Devices

D•R•K•H
(D•R can be indexed.)

Block Length

1 Point

17H
Read/Write
Multiple
Registers
(Available only
in FX

and

3UC

PLCs.)

MODBUS Address:

: Write Address

0000H~FFFFH

+1: Read

Address
0000H~FFFFH

Device Count:

: Write Count

1~121

+1: Read Count

1~125

PLC Destination Device
(head address)

: Write Data 1
+1: Write Data 2
+ (Write Count

) -1: Write

Data (

)

: Read Data 1

+1: Read Data 2

+ (Read Count

+1) -1:

Read Data (

+1)

Applicable Devices D•R

Block Length

Write Count

Read Count