YOKOGAWA Personal Computer Link Protocol

Create a new device

To configure the communication device of YOKOGAWA PLC, select [Tools] → [I/O Devices] or click on the icon on the main toolbar. The ‘I/O Device Configuration’ dialog box will pop up. Click the [New Device] button to open the ‘I/O Device Selection’ dialog box.

I/O Device Name: Give a device name. This name will be used in the tag configuration window of the database accompanied by the ‘Station Name’.

Select a device type

After selecting the [Ok] button on the previous step, the ‘Serial Communication Configuration’ dialog box will popup.

In this window, select the ‘YOKOGAWA Computer Link Protocol’ as the ‘Device Type’ and configure the proper serial communication parameters.   

Comm.Port: COM1

Select a communication port to communicate. If you use RS-422/485, you must select “COM1”.

When the RS-232C communication type of COM1 port is used, the 9P DSUB connector is used.

When the RS-422/485 communication type of COM1 port is used, the 5P plug connector is used.

If you use the COM1 port, you cannot use RS-232 and RS-422/485 at the same time. Only one type can be used per COM port.

Baud rate: 9,600

Select the communication speed for the equipment. The configuration of the communication speed of Xpanel must be the same as the configuration of the equipment. If the speed of the configurations of the two sides is different, they will not communicate with each other.

Parity bit: None

Data bits: 8 bits

Stop bits: 1 bit

RTS/CTS: OFF

RTS/CTS control is used for half-duplex communication. This example does not use RTS-CTS control.

Retry No.: 3

If communication failed with the devices, it will try to reconnect 3 times.

Time Out: 30

The time out count will be 30 seconds.

See the Communication Configuration section for more information about the remaining parameters.

Create a station

Move to the [Station] tab of the ‘Serial Communication Configuration’ dialog box and click the [Add Station] button. The ‘Station’ dialog box will pop up. Configure the contents and press [OK].

Station Name: ST

When the field equipment number exceeds two, the station name is used for the division of field equipment at the internal Xpanel.

It is expressed as “Device.Station”. This example shows you as “DEV.ST”.

Station Type: YOKOGAWA (no other type can be selected).

Network ID: This field has no effect.

Station No: 1

When the field equipment number exceeds two, it assigns a different Station No. to divide. The station number must be the same as configured in the field equipment. If the station numbers are different, the devices will not communicate with each other.

See the Communication Configuration section for more information about the remaining parameters.

Transmission Speed

Switch: SW1

Remove the side tab of the Personal Computer Link Module and then configure Baud Rate with SW1. The baud rate must be the same as the speed configured in the ‘Serial Communication Configuration’ dialog box.

The baud rate is set as 9600 bps by selecting Mode 5 in the configuration for this example.

Data Format Switch: SW2

You can configure the communication in this switch.

This configuration must be the same as configured in the 'Serial Communication Configuration' dialog box.

Data Length: 8 bits

Parity: None

Stop Bit: 1bit

CheckSum: Yes

The checksum will be used to protect communication data safely from the transmission error.

Termination Char: Yes

Attach <CR> at the end of the frame.

Protection: None

RS-232C: Null Modem

Xpanel connects three lines to the PLC. If these lines are not connected, the PLC will receive data, but cannot transmit to other field equipment, therefore the communication fails 

RS-422

The wiring in the terminal resistance must be 330 Ω. To improve the stability of communication, devices should connect through SG, using STP cables. Shielded cables must be earthed.

RS-485

The wiring in the terminal resistance must be 120 Ω. When using RS-485, connect SDA and SDB, but disconnect RDA and RDB. To improve the stability of communication, devices should connect through SG, using STP cables. Shielded cables must be earthed.

Device

Sym

F3SP20 / F3SA20

F3SP30 / F3SA30

F3SP21

F3SP25

F3SP35

Input

X

X00201–X61364

X00201–X61364

X00201–X71364

X00201–X71364

X00201–X71364

Output

Y

Y00201–Y61364

Y00201–Y61364

Y00201–Y71364

Y00201–Y71364

Y00201–Y71364

Internal

I

I00001–I04096

I00001–I08192

I00001–I04096

I00001–I08192

I00001–I16384

Common

E

E00001–E02048

E00001–E02048

E00001–E02048

E00001–E04096

E00001–E04096

Link

L

L00001–L01024

L00001–L01024

L00001–L11024

L00001–L71024

L00001–L71024

Special

M

M00001–M00512

M00001–M00512

M00001–M02048

M00001–M09984

M00001–M09984

Data

D

D00001–D05120

D00001–D08192

D00001–D05120

D00001–D08192

D00001–D08192

File

B

-

-

-

B00001–B32768

B00001–B32768

Link

W

W00001–W01024

W00001–W01024

W00001–W11024

W00001–W71024

W00001–W71024

Special

Z

Z00001–Z00256

Z00001–Z00256

Z00001–Z00512

Z00001–Z00512

Z00001–Z00512

Index

V

V00001–V00016

V00001–V00016

V00001–V00032

V00001–V00032

V00001–V00032

Common

R

R00001–R01024

R00001–R01024

R00001–R01024

R00001–R04096

R00001–R04096

Timer

T

TU0001–TU0256

TU0001–TU1024

TU0001–TU0256

TU0001–TU1024

TU0001–TU2048

TP0001–TP0256

TP0001–TP1024

TP0001–TP0256

TP0001–TP1024

TP0001–TP2048

TI0001–TI0256

TI0001–TI1024

TI0001–TI0256

TI0001–TI1024

TI0001–TI2048

TS0001–TS0256

TS0001–TS1024

TS0001–TS0256

TS0001–TS1024

TS0001–TS2048

Counter

C

CU0001–CU0256

CU0001–CU1024

CU0001–CU0256

CU0001–CU1024

CU0001–CU1024

CP0001–CP0256

CP0001–CP1024

CP0001–CP0256

CP0001–CP1024

CP0001–CP1024

CI0001–CI0256

CI0001–CI1024

CI0001–CI0256

CI0001–CI1024

CI0001–CI1024

CS0001–CS0256

CS0001–CS1024

CS0001–CS0256

CS0001–CS1024

CS0001–CS1024

Error Code

(EC1)

Semantics

Probable Causes

01

CPU Number Error

CPU number is not within the allowable range (1-4).

02

Command Error

No command. It cannot execute the command.

03

Device Specification Error

No device. Inadequate use of WORD in the bit device.

04

Value outside the setting range

When you write a Bit value, use only 0 or 1.

When you write Word, it must be between 0000-FFFF.

05

Data count out of range

The number of Bit/Word exceeded the permitted range.

The number of data or device parameters is not the same.

06

Monitor Error

Monitor operates without BRS/WRS.

07

CPU Type Error

It is not a Basic CPU.

08

Parameter Error

If the parameter is not specified, it will be invalid.

41

Communication Error

An error occurred during communication.

42

Checksum Error

Checksum dislike each other.

43

Internal Buffer Overflow

Receiving data is over the allowable number.

44

Timeout while receiving characters

ETX data receiving fail. The timeout is 5 seconds.