Exclusive Communications

READ WORD DATA

Function

• This is used to read the data in the word device of a PLC. (Max. 63 words)

• Device Symbol : X, Y, M, L, K, F, Z, TC, TS, CC, CS, D, S

Request Frame (Master)

COMMAND : ‘R’

Data Device Format

Master(Request Format)

              Leng is the length of a data and its value means the length of a data (D0000001 01).

              Data means the address really read (D0000001) and the length of the word data read (01).

              BCC is the remainder value when dividing the binary-sum from Cmd to the end of data by 256

Response Frame (Slave)

 COMMAND   ( In completed case: ‘R’  / In failed case: ‘E’ )

Format of Data Device

[Completed Case]

PLC DATA

Slave(Response Format)

The request frame received from a master is used as the response frame of a PLC.

BCC is the remainder value when dividing binary-sum from Cmd to the end of data by 256.

As the response frame is processed, Cmd is ‘R’..

Leng means the length of a data (F4AC).

[Failed Case]

Error Code

Slave(Response Format)

The request frame received from a master is used as the response frame of a PLC.

BCC is the remainder value when dividing the binary-sum from Cmd to the end of data by 256.

As the response frame is not processed, Cmd is ‘E’.

Leng means the length of error code(02).

Error code displays the type of an error. Please refer to the ‘ERROR RESPONSE’.

Ex.) Read data from Address D00040 of Station 02H.

Master(Request Format)

Completed Case> reads 1-word data ‘F4AC’

 Slave(Response Format)

Failed Case> Error in BCC

Slave(Response Format)

Write WORD DATA

Function

This is used to write a data to the word device of a PLC.

Device Symbol : X, Y, M, L, K, F, Z, TC, TS, CC, CS, D, S

Request Frame

 COMMAND : ‘W’

Format of Data Device

Master(Request Format)

Leng is the length of a data and its value means the length of the Data (D0000010 01 FA34).

The address really written (D0000010), the length of the data (01) and the data written (FA34) are input in the Data (D1000 02 FA34).

BCC is the remainder value (F3) when dividing the binary-sum from Cmd to the end of data by 256.

Response Frame

COMMAND (In completed case: ‘W’  /   In failed case : ‘E’ )

Format of Data Device

[Completed Case]

No Data

Slave(Response Format)

The request frame received from a master is used as the response frame of a PLC.

BCC is the remainder value when dividing the binary-sum from Cmd to the end of data by 256.

As the response frame is processed, Cmd is ‘W’.

Leng means the length of a data.

[Failed Case]

ERROR CODE

Slave(Response Format)

The request frame received from a master is used as the response frame of a PLC.

BCC is the remainder value when dividing the binary-sum from Cmd to the end of data by 256.

As the response frame is not processed, Cmd is ‘E’.

Leng(02) means the length of Error Code(01).

Error code displays the type of an error. Please refer to the ‘ERROR RESPONSE’.

Ex.) Write FA34H to Address D0010 and 8D41H to Address D0020.

Master(Request Format)

Completed Case  >   No Data½

Slave(Response Format)

Failed Case>Receiving unknown command code (01H).

Slave(Response Format)

Read BIT DATA

Function

This is used to read the data in the bit device of a PLC.

Device Symbol : X, Y, M, L, K, F, Z, T, C

Request Frame

COMMAND : ‘r’

Format of Data Device

Master(Requset Format)

• Leng is the length of a data and its value means the length of Data (M000010F 02H).

• The address really read(M000010F) and the length of the data(02) are input in the Data.

• BCC is the remainder value when dividing the binary-sum from Cmd to the end of data by 256.

Response Frame

COMMAND (In completed case: ‘r’ / In failed case: ‘E’ )

Format of Data Device

[Completed Case]

PLC Data

Slave(Response Format)

• The request frame received from a master is used as the response frame of a PLC.

• BCC is the remainder value when dividing the binary-sum from Cmd to the end of data by 256.

• As the response frame is processed, Cmd is ‘r’.

• Leng(02) means the length of the Data(0 1).

[ Failed Case ]

Error Code

Slave(Response Format)

• The request frame received from a master is used as the response frame of a PLC.

• BCC is the remainder value when dividing the binary-sum from Cmd to the end of data by 256.

• As the response frame is not processed, Cmd is ‘E’.

• Leng(02) means the length of Error Code(01).

• Error code indicates the type of an error. Please refer to the ‘ERROR RESPONSE’.

Ex.) Read the bit data in Address M0104 and Address M0105 of Station 03 PLC.

Master(Request Format)

Completed Case > Reads Data ‘0 1’.

Slave(Response Format)

Failed Case > Error in BCC

Slave (Response Format)

Write BIT DATA

Function

This is used to write data to the bit device of a PLC

Device Symbol : X, Y, M, L, K, F, Z, T, C

Request Frame

COMMAND : ‘w’

Format of Data Device

Master(Request Format)

• Leng(0B) is the length of data and its value means the length of Data (M0000101 03 110).

• The address really written(M0000101), the length of the data(03) and the data written(110) are input in the Data.

• BCC is the remainder value when dividing the binary-sum from Cmd to the end of data by 256.

Response Frame

COMMAND  ( In completed case: ‘w’  / In failed case: ‘E’ )

Format of Data Device

[Completed Case]

No Data

Slave(Response Format)

• The request frame received from a master is used as the response frame of a PLC.

• BCC is the remainder value when dividing the binary-sum from Cmd to the end of data by 256.

• As the response frame is processed, Cmd is ‘w’.

• Leng(00) means the length of the data.

[Failed Case]

Error Code

Slave(Response Format)

• The request frame received from a master is used as the response frame of a PLC.

• BCC is the remainder value when dividing the binary-sum from Cmd to the end of data by 256.

• As the response frame is not processed, Cmd is ‘E’.

• Leng(02) means the length of Error Code (04).

• Error code indicates the type of an error. Please refer to the ‘ERROR RESPONSE’.

Ex.) Write bit data to Bit Address M0104.

Master(Request Format)

< Completed Case >

Slave(Response Format)

Failed Case >  Data Size Overflow

Slave(Response Format)

Change PLC Mode

Function

 This is used to change the operation mode of a PLC.

Request Frame

COMMAND : ‘M’

Format of Data Device

 Mode Code

Master(Request Format)

• Leng(01) is the length of data.

• Mode code value(0) is input in the Data(0).

• BCC is the remainder value when dividing the binary-sum from Cmd to the end of data by 256.

• Only the case CPU is under REMOTE status is available.

Response Frame

COMMAND ( In completed case: ‘M’ / In failed case: ‘E’ )

Format of Data DEvice

[Completed Case]  No Dateø

Slave(Response Format)

• The request frame received from a master is used as the response frame of a PLC.

• BCC is the remainder value when dividing the binary-sum from Cmd to the end of data by 256.

• As the response frame is processed, Cmd is ‘M’.

• Leng(00) means the length of the data.

[Failed Case]

Error Code

Slave(Response Format)

• The request frame received from a master is used as the response frame of a PLC.

• BCC is the remainder value when dividing the binary-sum from Cmd to the end of data by 256.

• As the response frame is not processed, Cmd is ‘E’.

• Leng(02) means the length of Error Code (03).

• Error code indicates the type of an error. Please refer to the ‘ERROR RESPONSE’.

 Ex.) Change the operation mode of a PLC to PAUSE/REMOTE mode.

Master(Requset Format)

Completed Case

Slave(Response Format)

< Failed CAse  >  Invalid mode

Slave(Response Format)

Register Monitoring Device

Function

This is used to register a monitoring device.

16 devices can be registered as maximum. (Distinguishing by Frame No., 0h – Fh)

Individual device should be continuous and is limited to 63 words as maximum.

Request Frame

COMMAND : ‘X’

Format of Data Device

Master(Request Format)

• Leng(0B) is the length of a data.

• The Mode code(0), the Address(D0000001) and the Size(02) are input in the Data (0 D00001 02).

• BCC is the remainder value when dividing the binary-sum from Cmd to the end of data by 256.

Response Frame

COMMAND ( In completed case: ‘X’  / In failed case: ‘E’ )

Format of Data Device

[Completed Case]

No Data

Slave(Response Format)

• The request frame received from a master is used as the response frame of a PLC.

• BCC is the remainder value when dividing the binary-sum from Cmd to the end of data by 256.

• As the response frame is processed, Cmd is ‘X’.

• Leng(00) means the length of the data.

[Failed Case]

Error Code

Slave(Response Format)

The request frame received from a master is used as the response frame of a PLC.

BCC is the remainder value when dividing the binary-sum from Cmd to the end of data by 256.

As the response frame is not processed, Cmd is ‘E’.

Leng(02) means the number of Error Codes (07).

Error code indicates the type of an error. Please refer to the ‘ERROR RESPONSE’.

Ex.) Register Frame 1 and Addresses from D0011 to D0014 to Station 1.

Master(Response Format)

< Completed Case >

Slave(Response Format)

Failed CAse  >  Invalid Monitor Frame No.(0h~Fh)

Slave(Response Format)

Read Monitoring Device

Function

 This is used to read the registered monitoring device.

Request Frame

 COMMAND : ‘Y’

Format of Data Device

Master(Request Format)

Leng(01) is the length of a data.

Frame No. is input in the Data(0).

  BCC is the remainder value when dividing the binary-sum from Cmd to the end of data by 256.

Request Frame

COMMAND ( In completed case: ‘Y’ / In failed case: ‘E’ )

Format of Data Device

[Completed Case]

Slave(Response Format)

The request frame received from a master is used as the response frame of a PLC.

BCC is the remainder value when dividing the binary-sum from Cmd to the end of data by 256.

As the response frame is processed, Cmd is ‘Y’.

Leng(05) means the length of the Data(0 87F3).

[Failed Case]

Error Code

Slave(Response Format)

• The request frame received from a master is used as the response frame of a PLC.

• BCC is the remainder value when dividing the binary-sum from Cmd to the end of data by 256.

• As the response frame is not processed, Cmd is ‘E’.

• Leng(02) means the length of Error Code(08H).

• Error code indicates the type of an error. Please refer to the ‘ERROR RESPONSE’.

Ex.) If Frame 2h, Address D1005 and Address D1006 are registered as a monitoring device, read the registered device.

Master(Request Format)

< Completed Case >

Slave(Response Format)

< Failed Case > Number of the unregistered(Not initialized) frame

Slave(Response Format)