Mitsubishi FX Programming Port

The following applies to Mitsubishi FX0N, FX0S and FX1N PLC’s running the Mitsubishi FX Programming Port protocol.

Details on the device address can be found in the Device Properties Information Topic.

External Address Format

The External Address is an ascii string which exactly references an item of data within the PLC. It can be entered at configure time as a text string, and will be validated by the system before use. For this protocol the external address has the following format:

O - Octal Number 0 - 7

N - Decimal Number 0 - 9

Type	Offset
X	OOO
Y	OOO
M	NNNN
S	NNN
TS	NNN
CS	NNN
TN	NNN
CN	NNN
D	NNNN

Offset Format

The software also allows an item of data within the PLC to be referenced by means of a table selection and an offset. The following table shows the offset and table formats for all PLC types.

FX0N

Table	External Address Type	Type	Offset Format	Offset Range	Privilege R = Read W = Write	Description
X	X	Bit	OOO	000-177	RW	Inputs
Y	Y	Bit	OOO	000-177	RW	Outputs
M (0-255)	M	Bit	NNNN	0000-0255	RW	Auxiliary Relays
M (256-511)	M	Bit	NNNN	0256-0511	RW	Auxiliary Relays
M (512-767)	M	Bit	NNNN	N/A	RW	Auxiliary Relays
M (768-1023)	M	Bit	NNNN	N/A	RW	Auxiliary Relays
M (1024-1279)	M	Bit	NNNN	N/A	RW	Auxiliary Relays
M (1280-1535)	M	Bit	NNNN	N/A	RW	Auxiliary Relays
M (8000-8255)	M	Bit	NNNN	8000-8255	RW	Special Aux Relays
S (0-255)	S	Bit	NNN	000-127	RW	States
S (256-511)	S	Bit	NNN	N/A	RW	States
S (512-767)	S	Bit	NNN	N/A	RW	States
S (768-1023)	S	Bit	NNN	N/A	RW	States
TS	TS	Bit	NNN	000-063	RW	Timer Contacts
CS	CS	Bit	NNN	000-254 (032-234 N/A)	RW	Counter Contacts
TN	TN	Word	NNN	000-063	RW	Timer Current Value
CN	CN	Word	NNN	000-254 (32-234 N/A)	RW	Counter Current Value
D (0-255)	D	Word	NNNN	0000-0255	RW	Data Registers
D (1000-2499)	D	Word	NNNN	N/A	RW	File Data Registers
D (8000-8255)	D	Word	NNNN	8000-8255	RW	Special Data Registers

FX1N

Table	External Address Type	Type	Offset Format	Offset Range	Privilege R = Read W = Write	Description
X	X	Bit	OOO	000-177	RW	Inputs
Y	Y	Bit	OOO	000-177	RW	Outputs
M (0-255)	M	Bit	NNNN	0000-0255	RW	Auxiliary Relays
M (256-511)	M	Bit	NNNN	0256-0511	RW	Auxiliary Relays
M (512-767)	M	Bit	NNNN	0512-0767	RW	Auxiliary Relays
M (768-1023)	M	Bit	NNNN	0768-1023	RW	Auxiliary Relays
M (1024-1279)	M	Bit	NNNN	1024-1279	RW	Auxiliary Relays
M (1280-1535)	M	Bit	NNNN	1280-1535	RW	Auxiliary Relays
M (8000-8255)	M	Bit	NNNN	8000-8255	RW	Special Aux Relays
S (0-255)	S	Bit	NNN	000-127	RW	States
S (256-511)	S	Bit	NNN	256-511	RW	States
S (512-767)	S	Bit	NNN	512-767	RW	States
S (768-1023)	S	Bit	NNN	768-999	RW	States
TS	TS	Bit	NNN	000-255	RW	Timer Contacts
CS	CS	Bit	NNN	000-255	RW	Counter Contacts
TN	TN	Word	NNN	000-255	RW	Timer Current Value
CN	CN	Word	NNN	000-255	RW	Counter Current Value
D (0-255)	D	Word	NNNN	0000-0255	RW	Data Registers
D (1000-2499)	D	Word	NNNN	N/A	RW	File Data Registers
D (8000-8255)	D	Word	NNNN	8000-8255	RW	Special Data Registers

FX0S

Table	External Address Type	Type	Offset Format	Offset Range	Privilege R = Read W = Write	Description
X	X	Bit	OOO	000-017	RW	Inputs
Y	Y	Bit	OOO	000-015	RW	Outputs
M (0-255)	M	Bit	NNNN	0000-0255	RW	Auxiliary Relays
M (256-511)	M	Bit	NNNN	0256-0511	RW	Auxiliary Relays
M (512-767)	M	Bit	NNNN	N/A	RW	Auxiliary Relays
M (768-1023)	M	Bit	NNNN	N/A	RW	Auxiliary Relays
M (1024-1279)	M	Bit	NNNN	N/A	RW	Auxiliary Relays
M (1280-1535)	M	Bit	NNNN	N/A	RW	Auxiliary Relays
M (8000-8255)	M	Bit	NNNN	N/A	RW	Special Aux Relays
S (0-255)	S	Bit	NNN	000-063	RW	States
S (256-511)	S	Bit	NNN	N/A	RW	States
S (512-767)	S	Bit	NNN	N/A	RW	States
S (768-1023)	S	Bit	NNN	N/A	RW	States
TS	TS	Bit	NNN	000-055	RW	Timer Contacts
CS	CS	Bit	NNN	000-254 (016-234 N/A)	RW	Counter Contacts
TN	TN	Word	NNN	000-055	RW	Timer Current Value
CN	CN	Word	NNN	000-254 (016-234 N/A)	RW	Counter Current Value
D (0-255)	D	Word	NNNN	0000-0031	RW	Data Registers
D (1000-2499)	D	Word	NNNN	N/A	RW	File Data Registers
D (8000-8255)	D	Word	NNNN	8000-8069	RW	Special Data Registers

Property Pages

The following device advanced properties page exists for a Mitsubishi device:

PC response time is the time in units of 10 milliseconds, in which the PLC will expect a response from the panel or PC (the master).

PC number is the network address of the master on the Mitsubishi network. This parameter will not be used in a point-to-point setup.

Protocol Compatibility

A bit type table such as ‘X’ will support the configuration of point types bigger than a bit. If a 16-bit point is configured for example, 16 bits will be read from the table to fill the point. The FX Programming Port protocol does not support writing back of multiple bit points. They will return a comms block error. Only single bit writes are supported on bit tables.

A word type table such as ‘D’ supports the configuration of smaller or bigger point types. All larger point types will read the required number of words to fill the point. Byte type points will scale down the word to fit it into a byte. Bit type points allow the selection of a bit offset to reference the required bit from the word (0-15). In the case of bit selection points, drive outs will perform a read/modify/write operation as the protocol does not support a bit set operation in this case.

Port Settings

RS485 4 wire

	Baud Rate	9600
	Data Bits	7
	Stop Bits	1.0
	Parity	Even

Wiring Information

Connection of the PLC to a panel will be via either COM1 or COM2, using RS485 4 wire communications. The panel pin out diagram is shown below:

Generate/mitsubishi_fx_programmin.gif

Connection of the PLC to a PC running OPC Server will be via any available COM port, which may be either 25 pin or 9 pin depending on what is available. An intelligent RS485-to-RS232 converter will be required to connect using RS485 4 wire communications. The COM port pin out is shown below:

Generate/mitsubishi_fx_programmin1.gif

The Programming Port on the Mitsubishi FX PLC has a mini DIN socket which has the following pin out:

Generate/mitsubishi_fx_programmin2.gif

The following shows the correct wiring for connection to a Mitsubishi FX PLC through the Programming Port:

Examples

Output Table Last Output on FX0N

Y177

Counter Current Value Last Value on FX0N

CN254