RKC REX-F9000 Instruction Manual

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High Resolution

Temperature Controller

REX-F9000

Communication

Instruction Manual

RKC INSTRUMENT INC.

IM9000F02-E3

 MELSEC : MITSUBISHI product  C200HS: OMRON product  Company names and product names used in this manual are the trademarks or registered trademarks of

the respective companies.

Thank you for purchasing this RKC instrument. In order to achieve maximum performance and ensure proper operation of your new instrument, carefully read all the instructions in this manual. Please place this manual in a convenient location for easy reference.

SYMBOLS

WARNING

CAUTION

: This mark indicates precautions that must be taken if there is danger of electric

shock, fire, etc., which could result in loss of life or injury.

: This mark indicates that if these precautions and operating procedures are not

taken, damage to the instrument may result.

: This mark indicates that all precautions should be taken for safe usage.

: This mark indicates important information on installation, handling and operating

procedures.

: This mark indicates supplemental information on installation, handling and

operating procedures.

: This mark indicates where additional information may be located.

WARNING

 An external protection device must be installed if failure of this instrument

could result in damage to the instrument, equipment or injury to personnel.

 All wiring must be completed before power is turned on to prevent electric

shock, fire or damage to instrument and equipment.

 This instrument must be used in accordance with the specifications to prevent

fire or damage to instrument and equipment.

 This instrument is not intended for use in locations subject to flammable or

explosive gases.

 Do not touch high-voltage connections such as power supply terminals, etc.

to avoid electric shock.

 RKC is not responsible if this instrument is repaired, modified or

disassembled by other than factory-approved personnel. Malfunction can occur and warranty is void under these conditions.

IM9000F02-E3

i-1

CAUTION

 This is a Class A instrument. In a domestic environment, this instrument may cause radio

interference, in which case the user may be required to take adequate measures.

 This instrument is protected from electric shock by reinforced insulation. Provide

reinforced insulation between the wire for the input signal and the wires for instrument power supply, source of power and loads.

 Be sure to provide an appropriate surge control circuit respectively for the following:

- If input/output or signal lines within the building are longer than 30 meters.

- If input/output or signal lines leave the building, regardless the length.

 This instrument is designed for installation in an enclosed instrumentation panel. All high-

voltage connections such as power supply terminals must be enclosed in the instrumentation panel to avoid electric shock by operating personnel.

 All precautions described in this manual should be taken to avoid damage to the

instrument or equipment.

 All wiring must be in accordance with local codes and regulations.  All wiring must be completed before power is turned on to prevent electric shock,

instrument failure, or incorrect action. The power must be turned off before repairing work for input break and output failure including replacement of sensor, contactor or SSR, and all wiring must be completed before power is turned on again.

 To prevent instrument damage or failure, protect the power line and the input/output lines

from high currents with a protection device such as fuse, circuit breaker, etc.

 Prevent metal fragments or lead wire scraps from falling inside instrument case to avoid

electric shock, fire or malfunction.

 Tighten each terminal screw to the specified torque found in the manual to avoid electric

shock, fire or malfunction.

 For proper operation of this instrument, provide adequate ventilation for heat dispensation.  Do not connect wires to unused terminals as this will interfere with proper operation of the

instrument.

 Turn off the power supply before cleaning the instrument.  Do not use a volatile solvent such as paint thinner to clean the instrument. Deformation or

discoloration will occur. Use a soft, dry cloth to remove stains from the instrument.

 To avoid damage to instrument display, do not rub with an abrasive material or push front

panel with a hard object.

 Do not connect modular connectors to telephone line.

NOTICE

 This manual assumes that the reader has a fundamental knowledge of the principles of electricity,

process control, computer technology and communications.

 The figures, diagrams and numeric values used in this manual are only for purpose of illustration.  RKC is not responsible for any damage or injury that is caused as a result of using this instrument,

instrument failure or indirect damage.

 Periodic maintenance is required for safe and proper operation of this instrument. Some

components have a limited service life, or characteristics that change over time.

 Every effort has been made to ensure accuracy of all information contained herein. RKC makes no

warranty expressed or implied, with respect to the accuracy of the information. The information in this manual is subject to change without prior notice.

 No portion of this document may be reprinted, modified, copied, transmitted, digitized, stored,

processed or retrieved through any mechanical, electronic, optical or other means without prior written approval from RKC.

i-2

IM9000F02-E3

Page

1. SPECIFICATION................................................................... 1

2. CONNECTION ...................................................................... 3

3. SETTING FOR COMMUNICATION ...................................... 6

3. 1

Preparation for Setting Communication Parameters ......................................6

3.2 Transfer to Parameter Group 24 (PG24) ........................................................7

3.3 Communication Parameter Selection..............................................................8

3.4 Device Address Setting...................................................................................9

3.5 Communication Speed Setting......................................................................11

3.6 Communication Data Configuration Setting ..................................................13

3.7 Interval Time Setting .....................................................................................15

3.8 Protocol Setting............................................................................................. 17

3.9 Cautions for Communicatin...........................................................................19

4. RKC STANDARD COMMUNICATION................................ 22

4.1 Communication Protocol............................................................................... 22

4.1.1 Polling ..............................................................................................................22

4.1.2 Selecting ..........................................................................................................27

4.2 Communication Identifier .............................................................................. 31

5. LADDER COMMUNICATION ............................................. 36

5.1 Communication Protocol ............................................................................... 36

5.1.1 Communication data configuration ...................................................................36

5.1.2 Data format ......................................................................................................38

5.1.3 Data read .........................................................................................................39

5.1.4 Data write......................................................................................................... 40

5.1.5 Reversal of read/write data bytes .....................................................................41

5.1.6 REX-F9000 no response ..................................................................................43

5.1.7 Example of text sent by PLC ............................................................................43

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Page

5.2 Communication Identifier .............................................................................. 44

5.3 Example of Sequence Program ....................................................................46

5.3.1 MELSEC Series (MITSUBISHI)........................................................................ 46

5.3.2 C200HS (OMRON)...........................................................................................48

6. TROUBLESHOOTING ....................................................... 50

7. ASCII 7-BIT CODE TABLE................................................. 52

i-4

IM9000F02-E3

1. SPECIFICATION

Interface: Based on EIA standard RS-485

Connection method: 2-wire system, half-duplex multidrop connection

Communication distance: 1 km (max.)

(However, the maximum communication distance varies slightly with the surroundings such as cables etc.)

Synchronous method: Start/stop synchronous type

Communication speed: 1200 bps, 2400 bps, 4800 bps, 9600 bps, 19200 bps

Data type: RKC standard communication:

Start bit: 1 Data bit: 7 or 8 Parity bit: Unused or Used (Odd number or even number) Stop bit: 1 or 2

Ladder communication:

Start bit: 1 Data bit: 8 (Fixed) Parity bit: None Stop bit: 1

Protocol: RKC standard communication:

ANSI X3.28 subcategory 2.5, A4 Polling/selecting type

Ladder communication:

Non-protocol type

Error control (Only RKC standard communication):

Vertical parity (With parity bit selected) Horizontal parity (BCC check)

Maximum connection: RKC standard communication:

32 sets including a host computer

Ladder communication:

32 sets including a programmable controller

IM9000F02-E3

1. SPECIFICATIONS

Communication code: RKC standard communication:

ASCII 7-bit code

Ladder communication:

Text: BCD code Control code: STX (02H) *, CR (0DH) *, LF (0AH) *

* Code in brackets ( ) are in hexadecimal.

Terminal resister: 100 Ω or more (Externally connected)

Xon/Xoff control: None

Signal logic:

Signal voltage Logic

V (A) > V (B) 0 (Space status)

V (A) < V (B) 1 (Mark status)

IM9000F02-E3

2. CONNECTION

WARNING

In order to prevent electric shock or instrument failure, turn off power for this instrument and peripheral equipment before connecting or disconnecting.

Up to 32 REX-F9000 including the host computer (or programmable controller [hereinafter, the "PLC"]) can be connected if multidrop connected by RS-485.

(1) Terminal No. and signal details

Terminal

No.

7 SG Signal ground

8 T/R(A) Send data/Receive data

9 T/R(B) Send data/Receive data

Signal

name

Name

Signal direction

REX-F9000 Host computer or PLC

IM9000F02-E3

2. CONNECTION

(B)

(A)

(B)

(A)

)

(B)

(A)

(2) Connecting method



 When RS-485 is used as a host computer or PLC interface

 

It is necessary that a circuit to transfer send and receive be built-in the host computer (or PLC).

REX-F9000

T/R

  

REX-F9000

T/R

Up to 31

RS-485

Twisted pair wire

(with shield)

Paired wire

Host com

uter or PLC SG T/R

T/R

SD (TXD

RD (RXD

Send/receive selection signal

SD (TXD) and RD (RXD): Negative logic

*R: Termination resistors (Example: 120 Ω 1/2 W)



 When RS-232C is used as a host computer or PLC interface

 

Communication level converter (RS-232C/RS-485) is used.

REX-F9000

T/R(A)

Paired

RS-485

wire

Communication

level converter

T/R(A)

Host computer

RS-232C

Send data

：

Receive data

：

T/R(B)

*R: Termination resistors (Example: 120 Ω 1/2 W)

Twisted pair wire

(with shield)

When the host computer is for Windows 95/NT, use a communication level converter

of the automatic send/receive select type.

Recommended: CD485, CD485/V manufactured by Data Link, Inc. or equivalent.

T/R(B)

PLC communication module

IM9000F02-E3

(3) Connection example



 1-channel type

 

When up to 32 REX-F9000 controllers including host computer (or PLC) are connected.

2. CONNECTION

Device

address



 2-channel type

 

Host computer or PLC

RS-485

Junction terminal

REX-F9000

Junction terminal

REX-F9000

Host computer or PLC

RS-232C

Communication level converter

RS-485

Junction terminal

REX-F9000

For the 2-channel type REX-F9000 controller, set independent device addresses to CH1 and CH2.

Host computer or PLC

RS-485

Host computer or PLC

RS-232C

Communication level converter

RS-485

Device address for CH1

Device address for CH2

IM9000F02-E3

Junction terminal

1 0

REX-F9000

Junction terminal Junction terminal

3 2

5 4

REX-F9000

RS-485

7 6

REX-F9000

3. SETTING FOR COMMUNICATION

In order to make communication between the REX-F9000 and the host computer (or PLC), it is necessary to set the device address, communication speed, communication data configuration, interval time and protocol. Communication settings are made in parameter group 24 (PG24).

3.1 Preparation for Setting Communication Parameters

The setting of parameter group 24 (PG24) can be changed only in control stop mode. Before the SETUP mode is selected, it is necessary to set the mode selection of "Control RUN/STOP" to "STOP."

MODE

MODE MONI CH

MONI CH

SET

1. Press the MODE key to set the instrument to the mode transfer.

2. Press the MODE key to display "Control RUN/STOP."

3. Press the DOWN key to control is changed from execution (RUN) to STOP.

MODE MONI CH

: Bright lighting

SET

: Dim lighting

IM9000F02-E3

3. SETTING FOR COMMUNICATION

3.2 Transfer to Parameter Group 24 (PG24)

MODE MONI CH

SET

1. Press the SET key to set the instrument to the SV setting mode.

2. Press the SET key for more than 5 sec in SV setting mode to set

the instrument to operator set mode.

MODE MONI CH

SET

3. Press the SET key for more than 5 sec in operator set mode to set the instrument to setup mode.

4. Press the UP key a few times to display "PG24."

: Bright lighting

: Dim lighting

IM9000F02-E3

3. SETTING FOR COMMUNICATION

3.3 Communication Parameter Selection

Communication parameter in parameter group 24 (PG24) are selected in the order of device address (Add), communication speed (bPS), communication data configuration (bIT), interval time (InT) and protocol selection (CMPS). Each communication parameter is selected by pressing the SET key.

Display sequence



 

Parameter group 24

(PG24)

Press the SET key.

Device address

(Add)

Press the SET key.

Communication speed

(bPS)

Press the SET key.

Data configuration

(bIT)

In order to set the CH2 monitor, communication parameter, press the CH key to change CH1 to CH2. The setting procedure is

Press the SET key.

the same as the CH1 setting.

(InT)

Press the SET key.

Interval time

Protocol selection

(CMPS)

Press the SET key.

IM9000F02-E3

3. SETTING FOR COMMUNICATION

(

3.4 Device Address Setting

Set the desired device address by using the corresponding numeric value from 0 to 99. Press the UP or DOWN key to change the numeral, and also press the SHIFT key to shift the digit.

Symbol and symbol name



 

Add) : Device address

Setting range



 

Range: 0 to 99 Factory set value: 0

Setting procedure



 

For the 2-channel type REX-F9000, set independent device addresses to CH1 and CH2.

Example: When setting device address to 15.

1. Change the controller to parameter group 24 (PG24), and then display the device address (See P. 8).

MODE MONI C H

SET

2. Set the devise address. Press the UP key to enter "5" in the lowest

digit.

MODE MONI C H

SET

: Bright lighting

: Dim lighting

IM9000F02-E3

3. SETTING FOR COMMUNICATION

MODE MONI C H

SET

3. Press the SHIFT key to brightly light the tens digit.

4. Press the UP key to enter "1" in the tens digit.

5. Press the SET key to select the next communication parameter. As a result, the set device address is registered.

MODE MONI C H

SET

: Bright lighting

: Dim lighting

For the 1-channel type, if the key is not operated for more than 1 minute, the present display automatically returns to the PV/SV display.

For the 2-channel type, if the key is not operated for more than 1 minute, the present display automatically returns to the CH1PV/CH2PV display.

IM9000F02-E3

3. SETTING FOR COMMUNICATION

3.5 Communication Speed Setting

Set a communication speed of 1200 bps, 2400 bps, 4800 bps, 9600 bps or 19200 bps by using numerals from 0 to 4. Press the UP or DOWN key to change the numeral.

Symbol and symbol name



 

(bPS) : Communication speed

Setting items



 

Set value Communication speed Factory set value

0 1200 bps

1 2400 bps

2 4800 bps 3

3 9600 bps

4 19200 bps

Setting procedure



 

Set the same communication speed to both the REX-F9000 and connecting host

computer (or PLC).

For the 2-channel type REX-F9000, set the same communication speed to CH1 and

CH2.

Example: When setting communication speed to "2: 4800 bps."

1. Select the communication speed display. (See P. 8.)

MODE MONI C H

SET

IM9000F02-E3

: Bright lighting

: Dim lighting

3. SETTING FOR COMMUNICATION

MODE MONI C H

MOD MONI C H

SET

2. Press the DOWN key to enter "2" in the lowest digit. As a result, a communication speed of 4800 bps is set.

3. Press the SET key to change to the next communication parameter. As a result, the set communication speed is registered.

: Bright lighting

: Dim lighting

For the 1-channel type, if the key is not operated for more than 1 minute, the present display automatically returns to the PV/SV display.

For the 2-channel type, if the key is not operated for more than 1 minute, the present display automatically returns to the CH1PV/CH2PV display.

IM9000F02-E3

3. SETTING FOR COMMUNICATION

3.6 Communication Data Configuration Setting

Set the data configuration during communication. Press the UP or DOWN key to change the numeral.

Symbol and symbol name



 

(bIT) : Communication data configuration

Setting items



 

(1) RKC standard communication: Set the desired numeric value from 0 to 11.

Set value Parity bit Data bit Stop bit Factory set value

0 None 8 1

1 None 8 2

2Even 8 1

3Even 8 2

4Odd 8 1

5 Odd 8 2 0

6 None 7 1

7 None 7 2

8Even 7 1

9Even 7 2

10 Odd 7 1

11 Odd 7 2

(2) Ladder communication: The following numeric value is fixed.

Parity bit: None Data bit: 8 Stop bit: 1

IM9000F02-E3

If the protocol is for ladder communication, it becomes invalid even when the communication data bit configuration is selected.

3. SETTING FOR COMMUNICATION

Setting procedure



For the 2-channel type REX-F9000, set the same communication data configuration to

CH1 and CH2.

Example: When setting communication data configuration to "1: 8 data bits, no parity bit and

2 stop bits."

MODE MONI CH

SET

MODE MONI CH

SET

1. Select the data configuration during communication. (See P. 8.)

2. Press the UP key to enter "1" in the lowest digit. As a result,

communication data configuration is set to "8 data bits, no parity bit and 2 stop bits."

parameter. As a result, the set communication data configuration is registered.

: Bright lighting

3. Press the SET key to change to the next communication

MODE MONI CH

SET

: Dim lighting

For the 1-channel type, if the key is not operated for more than 1 minute, the present display automatically returns to the PV/SV display.

For the 2-channel type, if the key is not operated for more than 1 minute, the present display automatically returns to the CH1PV/CH2PV display.

IM9000F02-E3

3. SETTING FOR COMMUNICATION

3.7 Interval Time Setting

Set the interval time. Press the UP or DOWN key to change the numeral, and press the SHIFT key to shift the digit.

Symbol and symbol name



 

(InT) : Interval time

Setting range



 

Range: 0 to 250 ms Factory set value: 250

Setting procedure



 

For the 2-channel type REX-F9000, set the same interval time to CH1 and CH2.

Example: When setting interval time to 200 ms.

MODE MONI C H

SET

1. Select the interval time display. (See P. 8.)

2. Press the SHIFT key to brightly light the tens digit.

MODE MONI CH

SET

IM9000F02-E3

: Bright lighting

: Dim lighting

3. SETTING FOR COMMUNICATION

MODE MONI C H

SET

3. Press the DOWN key to enter "0" in the tens digit.

4. Press the SET key to change to the next communication

parameter. As a result, the set interval time is registered.

: Bright lighting

: Dim lighting

For the 1-channel type, if the key is not operated for more than 1 minute, the present display automatically returns to the PV/SV display.

For the 2-channel type, if the key is not operated for more than 1 minute, the present display automatically returns to the CH1PV/CH2PV display.

IM9000F02-E3

3. SETTING FOR COMMUNICATION

3.8 Protocol Setting

The protocol is selected. Either RKC standard communication or ladder communication is selected. Press the UP or DOWN key to change the numeral.

Symbol and symbol name



 

(CMPS) : Protocol selection

Setting items



 

Set value Protocol type Factory set value

0 RKC standard communication 0

1 Ladder communication

Setting procedure



 

For the 2-channel type REX-F9000, set the same protocol selection to CH1 and CH2.

Example: When setting protocol to "1: Ladder communication."

MODE MONI CH

SET

1. Select the protocol selection display. (See P. 8.)

: Bright lighting

: Dim lighting

MODE MONI CH

SET

IM9000F02-E3

2. Setting a numeric value of "1" by pressing the UP key changes the protocol to ladder communication.

3. SETTING FOR COMMUNICATION

MODE MONI CH

SET

parameter. As a result, the set data construction is registered.

: Bright lighting

: Dim lighting

For the 1-channel type, if the key is not operated for more than 1 minute, the present display automatically returns to the PV/SV display.

For the 2-channel type, if the key is not operated for more than 1 minute, the present display automatically returns to the CH1PV/CH2PV display.

3. Press the SET key to change to the next communication

IM9000F02-E3

3. SETTING FOR COMMUNICATION

3.9 Cautions for Communication

(1) Send/receive selection



 When host computer is selected from data sending to data receiving

 

When switching the host computer into reception from transmission, it must be confirmed that the data was surely put on line. This is not observe the transmission buffer of host computer itself, but confirming with shift register.

Next, the REX-F9000 side secures the maximum time until the transmission line changes to the data receiving side (until the REX-F9000 is ready to send data) after the host computer has received the stop bit corresponding to the final character. This maximum time corresponds to interval time. If no interval time is set, the REX-F9000 side may be set to the send state even when the host computer side is not set to the receive state. As a result, no communication is conducted correctly. In addition, set the interval time so as to match the host computer.



 When host computer is selected from data receiving to data sending

 

Polling procedure "Response wait time after BCC send" or selecting procedure "Response wait time after [ACK] or [NAK] send" is processing time required during REX-F9000 data sending. Therefore, select the host computer from receiving to sending after the lapse of the above time. As for the necessary processing time, refer to the table of page 21.

IM9000F02-E3

3. SETTING FOR COMMUNICATION

(2) RS-485 (2-wire system) send/receive timing

The transmission and reception of RS-485 communication are operated by a transmitting wire. Therefore, the timing of switching should be acted correctly. Send/receive example in the host computer and REX-F9000 is show in the following.



 Polling procedure

 

Host computer

REX-F9000

Send data

(Possible/Impossible)

Sending status

Send data

(Possible/Impossible)

Sending status

Possible

Imposs ible

Possible

Imposs ible

E O T

- - - - - -

E N Q

S T X

- - - - - -

B C C

a. (Response send time after calling [ENQ] receive) + (Interval time) b. Response send time after BCC send c. (Response send time after acknowledgment [ACK] receive) + (Interval time) or

(Response send time after negative acknowledge [NAK] receive) + (Interval time)



 Selecting procedure

 

Host computer

REX-F9000

Send data

(Possible/Impossible)

Sending status

Send data

(Possible/Impossible)

Sending status

Possible

Impos sible

Possible

Impos sible

S T X

- - - - - -

B C C

C K

N A K

a. (Response send time after BCC receive) + (Interval time) b. Response wait time after acknowledgment [ACK] send or

Response wait time after negative acknowledge [NAK] send

To switch the host computer from transmission to reception, send data must be on line. To check if data is on line, do not use the host computer’s transmission buffer but confirm it by the shift register.

IM9000F02-E3

3. SETTING FOR COMMUNICATION

(3) RS-422A/RS-485 Fail-safe

A transmission error may occur with the transmission line disconnected, shorted or set to the highimpedance state. In order to prevent the above error, it is recommended that the fail-safe function be provided on the receiver side of the host computer. The fail-safe function can prevent a framing error from its occurrence by making the receiver output stable to the MARK (1) when the transmission line is in the high-impedance state.

(4) Send/receive processing times

The processing time shown in the following is required for the REX-F9000 during data sending and receiving.



 Polling procedure

 

Procedure details Time (ms)

MIN TYP MAX

Response send time after calling [ENQ] receive

Response send time after acknowledgment [ACK] receive

Response send time after negative acknowledge [NAK] receive

Response send time after BCC send

Data link is terminated sending [EOT], if no response within about 3 sec after BCC send. Response wait time is the time when the interval time is set to 0 ms.



 Selecting procedure

 

Procedure details Time (ms)

Response send time after BCC receive 2.0 3.0 7.0

Response wait time after acknowledgment [ACK] send

Response wait time after negative acknowledge [NAK] send

   

MIN TYP MAX

 

7.0

1.0

IM9000F02-E3

Response wait time is the time when the interval time is set to 0 ms.

4. RKC STANDARD COMMUNICATION

[

]

[

]

[

]

[

]

[

]

4.1 Communication Protocol

The REX-F9000 uses the polling/selecting method to establish a data link. The basic procedure is followed ANSI X3.28 subcategory 2.5, A4 basic mode data transmission control procedure (Fast selecting is established for selecting).

• In the polling/selecting method, the REX-F9000 is controlled completely by the host computer is

permitted. Since the host computer invites information message sending from and receiving to the REX-F9000, send the data in accordance with the polling or selecting procedure. (Centralized control method)

• The code use in communication is 7-bit ASCII code including transmission control character. The

transmission control characters are [EOT] (04H), [ENQ] (05H), [ACK] (06H), [NAK] (15H), [STX] (02H) and [ETX] (03H). The figure in the parenthesis is indicating hexadecimal number.

4.1.1 Polling

Polling is an action that host computer requesting one of the REX-F9000 which selected among multidrop connected, to transmit the data. The procedure is as the following.

E O T

(1)

Host com

Address

uter send

(2)

Host

REX-F9000 send

E N

No response

computer send

REX-F9000 send

(5)

E O T

(4)

(3)

E T X

BCC

(8)

No response

Time out

T X

Data

(9)

Indefinite

Host computer send

E O T

(10)

E O T

(6)

C K

(7)

ID: Identifier

IM9000F02-E3

4. RKC STANDARD COMMUNICATION

Polling procedure



(1) Initialize of data link

Host computer sends [EOT] for initializing of data link before polling sequence.

(2) Polling sequence send

Host computer sends polling sequence with a format shown below.

Example:

ENQ

M02

Device address

2. 3.1.

ENQ

Identifier

1. Device address [Number of digits: 2]

This data is a device address of the REX-F9000 for polled and must be the same as the device address set value in item "3.4 Device address setting" (P. 9).

2. Identifier [Number of digits: 2] (See P. 31) This is for identifying data requested for the REX-F9000. Always attach the [ENQ] code to the end of the identifier.

3. [ENQ]

This is the transmission control character which indicates the end of the polling sequence. Then, the host computer waits for response from the REX-F9000.

(3) REX-F9000 data send

If the polling sequence is received correctly, the REX-F9000 sends data in the following format.

STX Identifier

1. [STX]

This is the transmission control character which indicates the start of the text (identifier and data).

IM9000F02-E3

1. 2. 3. 4. 5.

Data

ETX BCC

4. RKC STANDARD COMMUNICATION

2. Identifier [Number of digits: 2] (See P. 31) This is for identifying data (measured value, status and set value) sent to the host computer.

3. Data [Number of digits: 7]

Data indicated by the identifier belonging to the REX-F9000. It is expressed in decimal ASCII

code including a minus sing (−) and a decimal point. No zero suppression is made.

4. [ETX]

A transmission control character used to indicate text end.

5. [BCC]

BCC (Block Check Character) for error detection using horizontal parity. BCC is calculated by horizontal parity (even number).

Take off exclusive "OR" of all character from next [STX] through [ETX]. Not including [STX].

Example:

In the case of the data are:

S T X

BCC

000.3201M X

50H31H 03H30H30H30H2EH33H32H30H4DH

In the parenthesis are indicated with hexadecimal number.

BCC = 4DH ⊕ 31H ⊕ 30H ⊕ 32H ⊕ 33H ⊕ 2EH ⊕ 30H ⊕ 30H ⊕ 30H ⊕ 03H = 50H

Value of BCC becomes 50H

(4) REX-F9000 data send end (EOT send)

If the following cases, the REX-F9000 sends [EOT] to terminate the data link.

• When there is no specified identifier.

• When there is an error in the data type.

• After all the data has been sent.

(5) REX-F9000 no response

The REX-F9000 is set to no response when the polling sequence is not received correctly. If necessary, take time out recovery etc. for the host computer.

IM9000F02-E3

4. RKC STANDARD COMMUNICATION

(6) Acknowledgment [ACK]

Send [ACK] when the host computer could receive data items correctly. Next, the REX-F9000 sends the identifier data following the identifier just sent in succession shown in " Communication identifier list" (P. 31). If data send from the REX-F9000 is suspend, send [EOT] to terminate the data link.

(7) Negative acknowledge [NAK]

If the host computer cannot receive send data correctly from the REX-F9000, it sends [NAK] to the controller. Then, the REX-F9000 re-sends the same data to the host computer. As the number of re-send times is not specified, take the necessary measures on the host computer side if no recovery is made.

(8) No response from host computer

When the host computer is set to no response after the REX-F9000 sends data, the REX-F9000 sends [EOT] as time-out processing to terminate the data link (time-out time: approx. 3 sec).

(9) Indefinite response from host computer

When the response from the host computer is indefinite, the REX-F9000 sends [EOT] to terminate the data link.

(10) Data link termination [EOT]

If it is necessary to suspend communication with the REX-F9000 or to terminate the data link due to no response from the controller, the host computer sends [EOT].

IM9000F02-E3

4. RKC STANDARD COMMUNICATION

Polling procedure example (When the host computer requests data)



 Normal transmission

Host computer send

E O T

04H030H131HM4DH131H

IdentifierPolling

address

Host computer send

A C K

06H

S T X

02HA41HA41H030H030H030H030H030H030H030H

E N Q

05H

S T X

02HM4DH131H030H232H333H.2EH030H030H030H

REXF-9000 data send

Host computer send

E O

04H

03H

33H

REX-F9000 data send

E T X

03H

B C C

50H



For the presence of error in data

Host computer send

E O T

04H

30H131H

4DH

31H

E N Q

05H

IdentifierPolling

address

N A K

15H

S T X

02HM4DH131H030H232H333H.2EH030H030H030H

REX-F9000 data send

S T

02H

4DH131H030H232H333H.2EH

REX-F9000 data send

E T X

03H

Host computer sendHost computer send

B C C

50H

Error data

30H030H

A C K

06H

E T X

03H

B C C

50H

IM9000F02-E3

4. RKC STANDARD COMMUNICATION

[

]

4.1.2 Selecting

Selecting is an operation in which the host computer selects one from among the REX-F9000s multidrop connected and then of recommending data receive. The procedure is as the following. Due to adopted fast selecting in REX-F9000s therefore becomes the type to send the data which connected to selecting sequence.

Host computer send

E O T

(7)

E O

(1)

Address

(2)

Host com

S T X

uter send

[ Identifier ]

[ Data ]

(3)

[ BCC ]

T X

REX-F9000 send

No response

(6)

C K

(4)

(5)



 Selecting procedure

 

(1) Initialize of data link

Host computer sends [EOT] for initializing of data link before selecting sequence.

(2) Selecting address send

Send the selecting address selected as the selecting sequence from the host computer.

[Device address] (Number of digits: 2)

This data is a device address of the REX-F9000 to be selected and must be the same as the device address set value in item "3.4 Device address setting" (P. 9).

IM9000F02-E3

4. RKC STANDARD COMMUNICATION

(3) Data send

Host computer to send the data with a format indicated below continuing the selecting sequence.

STX Identifier Data ETX BCC

1. 2.

For [STX], [ETX] and [BCC], see item "4.1.1 Polling" (P. 22).

1. Identifier [Number of digits: 2] (See P. 31) This identifies the data (set value) which is sent by the host computer.

2. Data [Number of digits: 7]

This is the data indicated by the identifier of the REX-F9000. It is expressed in decimal ASCII

code including a minus sign ( − ) and a decimal point. Even zero suppressed data or data whose

figures below the decimal point are omitted can be received (However, the maximum number of digits is 7).

Example: When data is -1.5

−001.5 → Receivable −1.50 → Receivable

−01.5 → Receivable −1.500 → Receivable

−1.5 → Receivable

In addition, the REX-F9000 determines the receive data during selecting as follows.

Example: When setting data is between −10.00 to +10.00

When data is receivable: When data is not receivable:

−.5 → -0.5 − → Not receivable (NAK answer)

−.058 → -0.05 . → Not receivable (NAK answer)

.03 → 0.03 −. → Not receivable (NAK answer)

+0 → Not receivable (NAK answer)

(4) Acknowledgment [ACK]

If the REX-F9000 correctly received data sent from the host computer, send [ACK]. Then, if there is data to be sent next on the host computer side, send the data. After the data has been sent, send [EOT] to terminate the data link.

IM9000F02-E3

4. RKC STANDARD COMMUNICATION

(5) Negative acknowledge [NAK]

The REX-F9000 sends [NAK] in the following cases. Then the appropriate recovery processing steps, such as data resend on the host computer side should be taken.

• When an error occurs on the line (parity, framing error, etc.).

• When a BCC check error occurs.

• When there is no identifier.

• When receive data is not in the specified configuration

(Text is not in the "Identifier + data construction.")

• When the number of receive data digits exceeds 7.

• When normally receive data exceeds the setting range.

(6) No response

If the selecting address is not received correctly, the REX-F9000 is set to no response, if [STX], [ETX] and [BCC] is not received correctly, the REX-F9000 is also set to no response.

(7) Data link termination [EOT]

When terminating the data link because there was no more to be sent on the host computer side or the REX-F9000 was set to no response, send [EOT] from the host computer.

IM9000F02-E3

4. RKC STANDARD COMMUNICATION



 Selecting procedure example (When the host computer sends a set value)

 



 Normal transmission

 

Host computer send

04H030H131H

address

S T X

02HS53H131H030H232H333H.2EH030H030H030H

Send dataSelecting

E T X

03H

B C C

4EH

A C K

06H

REX-F9000 send

Host computer send

S T X

02HP50H131H030H333H030H.2EH030H030H030H

Send data



 For the presence of error in data

 

Host computer send

04H030H131H

address

02H

53H131H030H

Error data

03H

4FH

REX-F9000 send

33H.2EH030H030H030H

Send dataSelecting

A C K

06H

Host computer send

04H

30H232H

03H

4EH

REX-F9000 send

S T X

02H

......................0

N A K

15H

S T X

02HS53H131H030H232H333H.2EH030H030H030H

Resend data

E T X

03H

B C C

4EH

06H

REX-F9000 send

Host computer sendHost computer send

S T

1 .....

02HA41H

31H

IM9000F02-E3

4.2 Communication Identifier



 Communication identifier list

 

Before changing data corresponding to the identifiers from "XI (input type)" to "WB

(alarm 2 hold action selection)," always turn the "Control RUN/STOP" mode to

"STOP."

The number of digits is 7 for all data. [Except for model code (ID)]

4. RKC STANDARD COMMUNICATION

(Attributes RO: Read only, R/W: Read/Write)

Name Iden-

Model code

Measured value (PV)

Alarm 1 output

Alarm 2 output

Manipulated output value (MV)

Burnout

Error code

PID/AT transfer

AUTO/MANUAL transfer

Control RUN/STOP

Data range Attribute Factory set

tifier

ID 

M1 

0: OFF 1: ON RO

−5.0 to +105.0 %

When the instrument is the manual (MAN) mode, attribute becomes results in Read/Write (R/W).

0: OFF 1: ON RO

0 to 255 See Table 1 (P. 34) RO

0: PID 1: Autotuning (AT) R/W 0

0: AUTO 1: MANUAL

0: RUN 1: STOP R/W 0

value

   



 

R/W 0

Set value (SV)

Alarm 1 setting

Alarm 2 setting

Proportional band

Integral time

Derivative time

IM9000F02-E3

Setting limiter (low limit) to

setting limiter (high limit)

Process alarm:

0.000 to 50.000 °C

Deviation alarm:

−19.999 to +19.999 °C

0.001 to 50.000 °C

(0.000 can't be set.)

0.1 to 3600.0 seconds (0.0 can't be set.)

0.0 to 3600.0 seconds

0.0: Derivative action OFF

R/W 0.000

R/W 5.000

R/W 30.000

R/W 240.0

R/W 60.0

Continued on the next page.

4. RKC STANDARD COMMUNICATION

Continued from the previous page.

(Attributes RO: Read only, R/W: Read/Write)

Name Iden-

Control response parameter

PV bias

Sensor bias

Digital filter

Output limiter (high limit)

Output limiter (low limit)

AT bias

Alarm 1 differential gap

Alarm 1 timer setting

Alarm 2 differential gap

Alarm 2 timer setting

tifier

Data range Attribute Factory set

value

0: Slow

R/W 0 1: Medium 2: Fast

−19.999 to +19.999 °C R/W 0.000

−1.9999 to +1.9999 Ω R/W 0.0000

0.0 to 100.0 seconds

R/W 0.0

0.0: Digital filter OFF

Output limiter (low limit) to

R/W 100.0

+105.0 %

−5.0 % to

R/W 0.0

output limiter (high limit)

−19.999 to +19.999 °C R/W 0.000

0.000 to 50.000 °C R/W 2.000

0 to 600 seconds R/W 0

0.000 to 50.000 °C R/W 2.000

0 to 600 seconds R/W 0

Analog output specification selection

Analog output scale high

Analog output scale low

3, 4

Bar-graph display selection

Input type

0: Measured value (PV)

R/W 0 1: Deviation (DEV) 2: Set value (SV) 4: Manipulated output value (MV)

See Table 2 (P. 34) R/W 50.000

R/W 0.000

0: Manipulated output value(MV)

R/W 0

[1 dot: 5 %]

1: Deviation (DEV)

[0.01 °C/dot]

2: Deviation (DEV)

[0.1 °C/dot]

0: Pt100 Ω (3-wire system)

R/W

1: Pt100 Ω (4-wire system) 2: JPt100 Ω (3-wire system) 3: JPt100 Ω (4-wire system)

Continued on the next page.

IM9000F02-E3

Continued from the previous page.

4. RKC STANDARD COMMUNICATION

(Attributes RO: Read only, R/W: Read/Write)

Name

Decimal point position selection

Power supply frequency

Setting limiter (high limit)

Setting limiter (low limit)

Output cycle time

Direct/reverse action selection

Power feed forward

Alarm 1 type selection

Alarm 1 energize/deenergize selection

Alarm 1 action selection at abnormality

Alarm 1 hold action selection

Alarm 2 type selection

Alarm 2 energize/deenergize selection

Alarm 2 action selection at abnormality

Alarm 2 hold action selection

Iden-

tifier

Data range Attribute

0: No digit below decimal-point

R/W 1: 1 digit below decimal-point 2: 2 digits below decimal-point 3: 3 digits below decimal-point

0: 50 Hz

R/W 1: 60 Hz 2: Auto setting

Setting limiter (low limit) to

R/W

50.000 °C

0.000 °C to

R/W

setting limiter (high limit)

0.1 to 100.0 seconds R/W

0: Direct action

R/W 1: Reverse action

0: OFF 1: ON R/W

See Table 3 (P. 35) R/W

0: Energize

R/W 1: De-energize

0: Normal action

R/W 1: Forced alarm output ON

See Table 4 (P. 35) R/W

See Table 3 (P. 35) R/W

0: Energize

R/W 1: De-energize

0 : Normal action

R/W 1 : Forced alarm output ON

See Table 4 (P. 35) R/W

Factory set

value

50.000

0.000

0.1

Set data lock level selection

Mode lock level selection

This is an identifier which enables communication when there is an alarm 1.

This is an identifier which enables communication when there is an alarm 2.

IM9000F02-E3

See Table 5 (P. 35) R/W 0

See Table 6 (P. 35) R/W 0

Continued on the next page.

4. RKC STANDARD COMMUNICATION

This is an identifier which enables communication when there is an analog output.

The analog output specification selection must not set 3.

Data can be written only in STOP mode.

Set the auto setting when the power feed forward function is used. When no power feed input is used, set the desired power frequency (0: 50 Hz or 1: 60 Hz).

When "2: Auto setting" is selected, control stops under the following condition.

•••• When no power feed input is used (no power feed transformer is connected)

•••• When power feed input voltage becomes less than 30 % of rated value

When the power feed forward function is used, the power feed input is required from the power feed transformer. When no power feed input is used, always set the power feed forward function to "0: OFF."

When the power feed forward function is set to "1: ON," control stops under the

following condition.

•••• When no power feed input is used (no power feed transformer is connected)

•••• When power feed input voltage becomes less than 30 % of rated value

Table 1: Error code

Any number other than "0" indicates errors (RAM write error, etc.) detected by the REX-F9000 selfdiagnosis function. If two or more errors occur simultaneously, the sum total of all error Nos. is sent. Contact your nearest RKC sales agent or RKC sales office.

Error code Details

 MCU abnormality  MCU power supply voltage abnormality  Software abnormality

16 Input circuit abnormality

8 EEPROM error

4 Adjusted data destruction

2 Sensor break

1 Other abnormality

Table 2: Analog scale range

The analog output scale differs depending on the analog output specification.

Analog output specification Analog output scale range

0: When measured value (PV) is selected. 0.000 to 50.000 °C 1: When deviation (DEV) is selected. −19.999 to +19.999 °C 2: When set value (SV) is selected. 0.000 to 50.000 °C 3: When manipulated output (MV) is selected. −5.0 to +105.0%

IM9000F02-E3

Table 3: Alarm type

Set value Type

0 No alarm

1 Set value high alarm

2 Set value low alarm

3 Process high alarm

4 Process low alarm

5 Deviation high alarm

6 Deviation low alarm

7 Deviation high/low alarm (Absolute value setting)

8 Band alarm (Absolute value setting)

4. RKC STANDARD COMMUNICATION

Table 4: Hold action type

Set value Type

0 No hold action

1 Hold action is taken when the power is turned on.

2 Hold action is taken when the power is turned on or the setting changed.

Table 5: Set data lock level

Set value Set data lock level

0 Set value (SV) and parameter can't be set.

1 Only set value (SV) can be set.

2 Only parameter group (PG) can't be set.

Table 6: Mode lock level

Set value PID/AT AUTO/MANUAL Control RUN/STOP

0 ××× 1 ×× 2 × × 3  × 4 ×× 5 × 6 × 7 

IM9000F02-E3

: Unsettable (Mode lock) ×: Settable (Mode unlock)

5. LADDER COMMUNICATION

5.1 Communication Protocol

Ladder communication is a communication means provided for connecting with the PLC. The REXF9000 uses the ignored process for the ladder communication protocol.



 Definition of protocol

 

Read: Based on a data request from the PLC, data is sent to the PLC from the REX-F9000. Write: Based on a data request from the PLC, data is received by the REX-F9000.

5.1.1 Communication data configuration



 PLC →→→→ REX-F9000 (During data send from PLC)

 

1. 2. 3. 4. 5. 6. 7.

Number of bytes Number of BCD digits

11 2 2211

22 4 4422

Details



 REX-F9000 →→→→ PLC (During data receive by PLC)

 

Number of bytes Number of BCD digits Details

1. STX

This is the transmission control character which indicates the start of the text (identifier and data). Set to STX (02H) fixed.

2. ADR [Device address]

This data corresponds to the device address to select one REX-F9000 from among many REXF9000s to which the PLC is multi-drop-connected. This should be the same as the device address set value in "3.4 Device address setting" (P. 9).

STX

(02H)

1. 2. 3. 4. 5. 4. 5. 6. 7.

1 1 22222 1 1

2 2 44444 2 2

STX

(02H)

ADR ID CMD DAT CR

(0DH)LF(0AH)

......

ADR ID CMD DAT CMD DAT CR

......

(0DH)LF(0AH)

IM9000F02-E3

5. LADDER COMMUNICATION

3. ID [Identifier]

These are numbers used for the PLC to identify data to be requested or set to the REX-F9000. These are numbers of four figures in the communication identifier list (P. 44).

4. CMD [Command]

These are commands used for the PLC to identify the details of processing and the data sing to be requested to the REX-F9000.

PLC → REX-F9000 (During data send from PLC)

Command

Details Identifier transfer order

(CMD)

(0000)

0001

Read request

Upper byte → Lower byte

0010 Write request, write data + (Positive)

0011 Write request, write data − (Negative)

0100 Read request (Byte inversion)

1000 Write request, write data + (Positive) Lower byte → Upper byte 1100 Write request, write data − (Negative)

Other Usage inhibited



REX-F9000 → PLC (During data receive by PLC)

Command

Details Identifier transfer order

(CMD)

0000 Read response, read data + (Positive) Data transfer order is in

accordance with the command from the PLC connected to the REX-F9000.

0001 Read response, read data − (Negative) Upper byte → Lower byte

0010 Write response, write result data + (Positive)

0011 Write response, write result data − (Negative) 0100 Read response, read data − (Negative) Lower byte → Upper byte

1000 Read request, write result data + (Positive)

1100 Read request, write result data − (Negative)

Other Abnormal response

IM9000F02-E3



5. LADDER COMMUNICATION

5. DAT [Data]

Details of processing

by PLC

Polling

(For data read) REX-F9000 → PLC Read data

Selecting

(For data write) REX-F9000 → PLC Data after write execution

6. 7. CR, LF [Delimit] Control characters to indicate the end of a text. The REX-F9000 judges that the text ends if it receives CR (0DH) and LF (0AH) in succession.

Communication direction Details of send/receive data

PLC → REX-F9000 Number of read data (Maximum 30)

(Data such as measured value (PV), etc.)

PLC → REX-F9000 Write data

5.1.2 Data format

The data (DAT) format is expressed as internal data excluding the decimal point.

Example:

Data name Actual data Internal data

Manipulated output value (MV)

Proportional band 0.001 to 50.000 0001 to 5000

PV bias −19.999 to +19.999 −1999 to +1999

Alarm 1 setting Process alarm: 0.000 to 50.000

−5.0 to +105.0 −0050 to +1050

Process alarm: 0000 to 5000

Deviation alarm: −19.999 to +19.999

Deviation alarm: −1999 to +1999

IM9000F02-E3

5. LADDER COMMUNICATION

5.1.3 Data read

Reads identifiers requested from the PLC by the corresponding number of data items. A response from REX-F9000 is returned as 4-digit BCD data excluding the sign data and decimal point. Number of data which can be read at a time: 1 to 30.

PLC send data

Number of bytes 11 2 2 2 11

Number of BCD digits

Details STX

22 4 4 4 22

Identifier

(ID)

(02H)

Device

address

(ADR)

REX-F9000 response under normal operation

Number of bytes

Number of BCD digits

Details STX

1122222

2244444

Identifier

(ID)

(02H)

Device

address

(ADR)

0001 Read

data

(0DH)LF(0AH)

Command Data (DAT) (CMD)

0000 dddd1 0000 dddd2

.....

IM9000F02-E3

This numeric value changes depending on the data sign

Command Data (DAT) Data corresponding (CMD) to identifier + 1

(+ or −). (0 or 1)

.....

2211

4422

0000 ddddn CR LF

Data corresponding to

identifier + n − 1 (n: Number of read data)

If there is no identifier requested by the PLC, the REX-F9000 returns the "0000" data.

5. LADDER COMMUNICATION

5.1.4 Data write

Writes the specified data in the specified identifier. Write data is specified by 4-digit BCD data excluding the sign data and decimal point. The number of data which can be written at a time is 1.

PLC send data

Number of bytes 11 2 2 2 11

Number of BCD digits

Details STX

22 4 4 4 22

dddd CR

(0DH)LF(0AH)

(02H)

Device

address

(ADR)

Identifier

(ID)

0010

0011

Command Setting data (CMD)

REX-F9000 response

Number of bytes 11 2 2 2 11

Number of BCD digits

Details STX Device

22 4 4 4 22

dddd CR LF

address

(ADR)

Identifier

(ID)

0010

0011

The original data is returned by ignoring data write for either of the following cases.

• The data range is exceeded, or

• a write inhibit identifier is specified.

IM9000F02-E3

5. LADDER COMMUNICATION

5.1.5 Reversal of read/write data bytes

There are two methods of sending word data: One is to send the data from the upper byte and the other is to send the data from the lower byte. The following two items can be inverted: Identifier (ID) and data (DAT). Only the data (DAT) can also be inverted by setting.

Number of bytes 11 2 2 2 11

Number of BCD digits

Details STX

22 4 4 4 22

(02H)

Device

address

(ADR)

Identifier

(ID)

Command

(CMD)

These two items can be inverted.



 Inverting method

 

Reversal of Identifier (ID) and data (DAT)

The usual data transfer order is reversed by the command (CMD).

PLC → REX-F9000 (During data send from PLC)

Command

Details Identifier transfer order

(CMD)

(0000)

Read request

0001

Data

(DAT)

(0DH)LF(0AH)

Upper byte → Lower byte

0010 Write request, write data + (Positive)

0011 Write request, write data − (Negative)

0100 Read request (Byte inversion)

1000 Write request, write data + (Positive) Lower byte → Upper byte 1100 Write request, write data − (Negative)

Other Usage inhibited

IM9000F02-E3



Continued on the next page.

5. LADDER COMMUNICATION

Continued from the previous page.

REX-F9000 → PLC (During data receive by PLC)

Command

Details Identifier transfer order

(CMD)

0000 Read response, Read data + (Positive) Data transfer order is in

0001 Read response, Read data − (Negative) Upper byte → Lower byte

0010 Write response, Write result data + (Positive)

0011 Write response, Write result data − (Negative)

accordance with the command from the PLC connected to the REX-F9000.

0100 Read response, Read data - (Negative) Lower byte → Upper byte

1000 Write request, Write result data + (Positive)

1100 Write request, Write result data − (Negative)

Other Abnormal response



 Only data is inverted

 



Change can be made by specifying "0011" to the data number (ID) and setting data on "0: High

order→Low order " or "Other than 0: Low order→High order."

Number of bytes 11 2 2 2 11

Number of BCD digits

Details STX

22 4 4 4 22

(0DH)LF(0AH)

(02H)

Device

address

(ADR)

0011

Command

(CMD)

Set 0 or any number other than 0.

Identifier (ID) Data (DAT)

Example: The following procedure is executed for send/receive data of 1234h.

• When sending data from the upper byte

When REX-F9000 sends data: Sends data in order of 12h and 34h. When REX-F9000 receives data: When REX-F9000 receives data in order of 12h and 34h, it

recognizes the data as 1234h.

• When sending data from the lower byte

When REX-F9000 sends data: Sends data in order of 34h and 12h. When REX-F9000 receives data: When REX-F9000 receives data in order of 12h and 34h, it

recognizes the data as 3412h.

This setting is held even if the power is turned on again.

IM9000F02-E3

5. LADDER COMMUNICATION

5.1.6 REX-F9000 no response

The REX-F9000 issues no-response for any of the following cases.

• The device address sent from the PLC does not match the device address of the REX-F9000.

• "CR" and "LF" can't be normally received.

• When there is an error in the data type.

• When a communication error occurs.

5.1.7 Example of text sent by PLC



 Example of text

 

It is assumed that the address No. is 00 and that data notation is hexadecimal.



 When reading measured value (PV)

 

PLC send

CommandDevice

address

Identifier



 When writing set value (PV)

 

PLC send

Device address

Command

Identifier

Number of read data

Write data

LFCR00010000010000STX

LFCR00300010010500STX

REX-F9000 response

Device address

REX-F9000 response

Device address

Identifier

Measured value

Identifier

LFCR00230000010000STX

(PV)

LFCR00300010010500STX

Set value

(SV)

IM9000F02-E3

5. LADDER COMMUNICATION

5.2 Communication Identifier

In RKC standard communication described above, each item is expressed by an identifier combined with a number and a letter (M1, S1 ...) but in ladder communication, each item is expressed only by a number.

(Attributes RO: Read only, R/W: Read/Write)

Item

Measured value (PV)

Undefined

Manipulated output value (MV)

Undefined

Alarm 1 output

Alarm 2 output

Burnout (Measured value)

Set value (SV)

Alarm 1 setting

Alarm 2 setting

Identifier

Upper Lower

01 00

Details of data #1 #2 Factory

Within input range 1/100 °CRO

set value



01 01 

01 02

−0050 to +1050 1/10 % RO



01 03 

01 04

01 05

See Note 1 (P. 45)

Setting limiter (low limit) to



1/100 °C R/W 0000



setting limiter (high limit)

01 06

Process alarm:

1/100 °C R/W 0500

0.000 to 50.000

01 07

Deviation alarm:

−19.999 to +19.999

Undefined

01 08 

01 09

Proportional band

Undefined

Integral time

Derivative time

PID/AT transfer

AUTO/MANUAL

01 10

01 11 

01 12

01 13

01 14

01 15

transfer

The amount of

01 16

manual output

#1: Engineering unit #2: Attribute

0001 to 5000 °C R/W 3000

0001 to 3600 second R/W 0240

0000 to 3600 second R/W 0060

0: PID



R/W 0000

1: Autotuning (AT)

0: AUTO



R/W 0000

1: MANUAL

Output limiter (low limit) to

1/10 % R/W



output limiter (high limit)

Continued on the next page.

IM9000F02-E3

Continued from the previous page.

Item

Identifier

5. LADDER COMMUNICATION

(Attributes RO: Read only, R/W: Read/Write)

Details of data #1 #2 Factory

Upper Lower

PV bias

Undefined

Control RUN/STOP

Reversing the usual data transfer

order

01 17

00 00

00 11

−1999 to +1999 1/100 °C R/W 0000 

0: RUN 1: STOP

0: Upper byte→Lower byte

Any number other than 0:

Lower byte→Upper byte

#1: Engineering unit #2: Attribute

Note 1: Details of the alarm 1 output, alarm 2 output and burnout

0 0 0 0 "0" Fixed When burnout occurred = 1 When the alarm 2 occurred = 1 When the alarm 1 occurred = 1



set value

R/W 0000

Data can be written only in manual mode.

Specified when only the data (DAT) block is inverted. If the inversion of transfer order is specified by the command (CMD), this setting becomes invalid.

IM9000F02-E3

5. LADDER COMMUNICATION

5.3 Example of Sequence Program

5.3.1 MELSEC Series (MITSUBISHI)

The ladder communication send/receive program using the MITSUBISHI MELSEC Series (A2CCPU24) is described below.



 Send data creation program (example)

 

M000

Send data creation switch



 Send program (example)

 

D11H0002MOVP

D12H0100MOVP

D13H0001MOVP

D14H0001MOVP

D15H0A0DMOVP

STX setting Address setting = 01

Identifier setting (Measured value)

Command (CMD) setting

Data setting (Number of read data = 1)

Termination character setting (CR, LF)

Send start switch

X1E0

Send completion

Y1F0X1E0M001

Send request

Data length settingD10K5MOVP

K6D10H0K61TOP

Y1F0SET

Y1F0RST

Transfer to send buffer

Send request setting

Send request resetting

IM9000F02-E3



 Receive program (example)

 

5. LADDER COMMUNICATION

X1E1

Receive data read request

K1D20H80K61FROMP

ZD20MOVP

D21H81K61FROMP

K0Z

Y1F1

Acquisition of receive character length

Stores character length in index register

Transfers receive data from receive buffer

Receive data read completion setting

X1E0, X1E1, Y1F0, Y1F1 and K61 in the above program differ depending on the programmable controller used to communication module address.

For details on setting the PLC, see the manual for "MITSUBISHI MELSEC Series."

IM9000F02-E3

5. LADDER COMMUNICATION

5.3.2 C200HS (OMRON)

The communication send/receive program using the OMRON C200HS is described below. The following types of OMRON C200HS with the built-in RS-232C post can perform non-protocol communication.

• C200HS-CPU21

• C200HS-CPU23

• C200HS-CPU31

• C200HS-CPU33



 Send data creation program (example)

 

30000

Send data creation switch



 Send program (example)

 

MOV #0201 D1000

MOV #0100 D1001

MOV #0001 D1002

MOV #0001 D1003

MOV #0D0A D1004

STX setting Address setting = 01

Identifier setting [Measured value (PV)]

Command setting (CMD)

Data setting (DAT) Number of read data = 1

Termination character (CR, LF)

30001 26405

Send start switch

Send ready flag

TXD D1000 #0000 #0010

RSET 30001

Send data head register Control data Number of send data bytes

Send start reset switch

IM9000F02-E3



 Receive program (example)

 

5. LADDER COMMUNICATION

26406

Receive completion flag

For details on setting the PLC, see the manual for "OMRON C200HS."

RXD D1100 #0000 #0256

Receive data head register Control data Number of stored data bytes

IM9000F02-E3

6. TROUBLESHOOTING

The causes of and measures to be used for faulty controller status during communication are described in the following. For trouble other than the below, contact us or your nearest RKC agent after confirming Model No. and specifications.



 RKC standard communication

 

Details Cause Measures

No response

EOT return

Trouble with and imperfect contact of

communication cable and connector

Device address designation differs Make reassignment after checking the device

Incorrect communication speed Set the communication speed suitable for the

Incorrect data configuration setting Make reassignment after checking the data

Transmission line is not set to the receive

state after data send

Incorrect identifier Make re-setting after checking the identifier

The identifier of a function not added to

the REX-F9000 is specified

BCC error Check BCC of the transmission data.

Check communication cables and connectors.

address by referring to "3.4 Device address setting" (P. 9).

host computer by referring to "3.5 Communication speed setting" (P. 11).

configuration by referring to "3.6 Data configuration setting" (P. 13).

Check a program on the host computer side.

by referring to " Communication identifier list" (P. 31).

NAK return

Data exceeds the setting range Check a data range.

The identifier of a function not added to

the REX-F9000 is specified

Make re-setting after checking the identifier by referring to " Communication identifier list" (P. 31).

IM9000F02-E3



 Ladder communication

 

Details Cause Measures

6. TROUBLESHOOTING

Trouble wit and imperfect contact communication cable and connector

Device address designation differs Make reassignment after checking

Incorrect communication speed Set the communication speed suitable

No response Incorrect data configuration setting Make reassignment after checking

Transmission line is not set to the receive state after data send

The specified identifier is not defined. Check the identifier.

The number of read data exceeds the specified number.

Check communication cables and connectors.

the device address by referring to "3.4 Device address setting" (P. 9).

for the PLC by referring to "3.5 Communication speed setting" (P. 11).

the data configuration by referring to "3.6 Data configuration setting" (P.

13).

Check the program on the PLC side.

Check the number of data.

No command length is correct (Command length must be 10 bytes including CR and LF.)

No settings are written Write data is out of the range Check a setting range.

An unsettable identifier (measured value, etc.) was specified.

All return characters other than STX, device address, identifier, CR and LF are set to F.

Characters other than BCD codes (0 to

9) were used for communication data (excluding STX, CR and LF)

Check the PLC side program.

Check whether they are identifiers corresponding to settable items.

Make conversion to BCD coded characters.

IM9000F02-E3

7. ASCII 7-BIT CODE TABLE

b700001111

b600110011

b501010101

b5 to b7b4b3b2b1 01234567

00000NULDLE SP 0 @ P ‘ p

00011SOHDC1 ! 1 A Q a q

00102STXDC2 ” 2 B R b r

00113ETXDC3 # 3 C S c s

01004EOTDC4 $ 4 D T d t

01015ENQNAK % 5 E U e u

01106ACKSYM & 6 F V f v

01117BELETB ’ 7 G W g w

10008 BS CAN ( 8 H X h x

10019 HT EM ) 9 I Y i y

1010A LF SUB * : J Z j z

1011B VT ESC + ; K [ k {

1100C FF FS , < L ¥ l |

1101D CR GS - = M ] m }

1110E SO RS . > N ^ n ˜

1111F SI US / ? O _ o DEL

IM9000F02-E3

The first edition: APR.1999 The third edition: AUG.2002 [IMQ01]

RKC INSTRUMENT INC.

HEADQUARTERS: 16-6, KUGAHARA 5-CHOME, OHTA-KU TOKYO 146-8515 JAPAN

PHONE: 03-3751-9799 (+81 3 3751 9799) E-mail: info@rkcinst.co.jp FAX: 03-3751-8585 (+81 3 3751 8585)

IM9000F02-E3 AUG.2002

RKC REX-F9000 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SYMBOLS

WARNING

CAUTION

NOTICE

CONTENTS

1. SPECIFICATION

2. CONNECTION

3. SETTING FOR COMMUNICATION

3.1 Preparation for Setting Communication Parameters

3.2 Transfer to Parameter Group 24 (PG24)

3.3 Communication Parameter Selection

3.4 Device Address Setting

3.5 Communication Speed Setting

3.6 Communication Data Configuration Setting

3.7 Interval Time Setting

3.8 Protocol Setting

3.9 Cautions for Communication

4. RKC STANDARD COMMUNICATION

4.1 Communication Protocol

4.1.1 Polling

4.1.2 Selecting

4.2 Communication Identifier

5. LADDER COMMUNICATION

5.1 Communication Protocol

5.1.1 Communication data configuration

5.1.2 Data format

5.1.3 Data read

5.1.4 Data write

5.1.5 Reversal of read/write data bytes

5.1.6 REX-F9000 no response

5.1.7 Example of text sent by PLC

5.2 Communication Identifier

5.3 Example of Sequence Program

5.3.1 MELSEC Series (MITSUBISHI)

5.3.2 C200HS (OMRON)

6. TROUBLESHOOTING

7. ASCII 7-BIT CODE TABLE