Manuals > Device Connection Guide > Mitsubishi Electric > Open Protocol (RS-232C)

About the connection example

Please see below for an example of connection settings for this driver.

Applicable models etc.

explanation

This is an example of connection settings via RS-232C with the AnU series.

About the A series driver

There are two types of A series drivers:

1.MELSEC-A CPU Normal address
It can be used with all CPUs in the A series, but the accessible addresses are more limited than those of "MELSEC-AnA/AnU".

2.MELSEC-AnA/AnU Extended Address
The models that can be used are limited to AnA and AnU, but the addresses are extended.

The accessible address range is specified in the Computer Link manual published by the manufacturer. For details, see "Device range when using ACPU common commands" (page 5-36) and "Device range when using AnA/AnUCPU common commands" (page 5-39) in the Computer Link/Multidrop Link Unit User's Manual (manual type name "KEISANKI-U-KP").

Device List

The compatible devices are as follows (see here for how to view the device list).

A series normal address

device	keyword	Start address	explanation	unit	reading	Writing
Input Relay	X	0000	Hexadecimal	bit	○	○
Output Relay	Y	0000	Hexadecimal	bit	○	○
Internal Relay	M	0000	Decimal	bit	○	○
Special Relay	M	9000	Decimal	bit	○	○
Latching Relay	L	0000	Decimal	bit	○	○
Step Relay	S	0000	Decimal	bit	○	○
Link Relay	B	0000	Hexadecimal	bit	○	○
Annunciator	F	0000	Decimal	bit	○	○
Timer Contact	TS	000	Decimal	bit	○	○
Timer coil	TC	000	Decimal	bit	○	○
Counter Contact	CS	000	Decimal	bit	○	○
Counter coil	CC	000	Decimal	bit	○	○
Timer current value	TN	000	Decimal	word	○	●
Counter current value	CN	000	Decimal	word	○	●
Data Register	D	0000	Decimal	word	○	●
Special Registers	D	9000	Decimal	word	○	●
Link Register	W	0000	Hexadecimal	word	○	●
File Register	R	0000	Decimal	word	○	●
Extended File Register (Block)	R	0000000	Decimal number 3 digits (block number) + 4 digits (0 to 8191)	word	○	●

AnA/U Address extension

device	keyword	Start address	explanation	unit	reading	Writing
Input Relay	X	000000	Hexadecimal	bit	○	○
Output Relay	Y	000000	Hexadecimal	bit	○	○
Internal Relay	M	000000	Decimal	bit	○	○
Special Relay	M	009000	Decimal	bit	○	○
Latching Relay	L	000000	Decimal	bit	○	○
Step Relay	S	000000	Decimal	bit	○	○
Link Relay	B	000000	Hexadecimal	bit	○	○
Annunciator	F	000000	Decimal	bit	○	○
Timer Contact	TS	00000	Decimal	bit	○	○
Timer coil	TC	00000	Decimal	bit	○	○
Counter Contact	CS	00000	Decimal	bit	○	○
Counter coil	CC	00000	Decimal	bit	○	○
Timer current value	TN	00000	Decimal	word	○	●
Counter current value	CN	00000	Decimal	word	○	●
Data Register	D	000000	Decimal	word	○	●
Special Registers	D	009000	Decimal	word	○	●
Link Register	W	000000	Hexadecimal	word	○	●
File Register	R	000000	Decimal	word	○	●
Extended File Register (Block)	R	0000000	Decimal number 3 digits (block number) + 4 digits (0 to 8191)	word	○	●
Extended file register (sequential number)	R	0000000		word	○	●

AnA/U Extended address equivalent to AJ71UC24

AnA/U Extended address equivalent to AJ71UC24