Omega Products RD5100 Installation Manual

Contents

Introduction 1

1 Overview 2

1.1 485 communication interface 2

1.2 Communication protocol 2

2 Communication specifications 2

3 Confirmation and setting method of communication

specification

4 Connection 4

4.1 Precautions during connection 4

4.2 Communication cable 5

4.3 Connection of RS-485 7

5 MODBUS protocol 8

5.1 Transmission mode of message 9

5.2 Data time interval 10

5.3 Message configuration 10

5.4 Method of creating message 16

5.5 Function code 17

5.6 Process during abnormality 21

5.7 Print message function 23

5.8 Reference table 24

6 Before connecting to the network 81

6.1 Allocation of IP address 82

6.2 Communication error of Ethernet 83

Introduction

This instruction manual explains the handling and specifications about 3 communication interfaces ( RS-485, USB, Ethernet) in the common communication interface edition of Hybrid recorder RD5100 series. Each individual part is divided into “

collectively explained. Hence read the part that is required.

Confirm the communication interface of the purchased RD5100 series by model code.

RD5100 series

RD51-

Communication interface N: None 1: RS-485+USB+Ethernet+Contact point 1 output (Contact point 1 output mechanical relay ‘a’ contact point output)

1. Other instruction manuals to be referred to

RS485”, “USB”, “Ethernet” and common part is

As this manual gives a limited explanation about the communication interface, refer to the instruction manual of this instrument itself for the operation methods etc.

ÚFor the PC to be used refer to the instruction manual of that PC.

2. Precaution table  Precautions

In between the sentences in this instruction manual there are explanations. It is the description of things that are to be observed during operation and at the time of handling the communication interface. If these things are not followed the device may be damaged and the performance will drop remarkably or operation may not run properly.

 Precautions

(1) The contents of this document may be changed without notice in the

future.

(2) All the possible care has been taken while creating this manual.

However if you come across any mistake, or have any doubts or if you notice any description leakage etc. contact the shop from where you purchased the product or contact our company's nearest branch office.

(3) Please note that irrespective of (2) we will not be responsible for the

effect of operation result.

－1－

1 Overview

In communication interface of RD5100 there are 3 types viz. RS-485, USB, Ethernet available and are used for communicating with the personal computer (Hereafter referred to as PC). PC can receive measurement data from RD5100, various parameters can be set and operation commands can be executed. Connection count of RD5100 is 1 USB and maximum 31 RS-485.

1.1 RS-485 communication interface

RS-485 communication interface can communicate by connecting in series multiple (maximum 31) RD5100 series machines through the signal that conforms to RS-485. Although the number of PCs having RS-485 is less, it can be easily connected by using RS-232C RS-485 signal converter, as it is a serial communication. As this company also has line converters for RS-232C RS-485 signal conversion, you can place an order for them.

1.2 Communication protocol

RD5100 series uses MODBUS protocol (MODBUS is a registered trademark of SCHNEIDER

Company) as communication protocol MODBUS protocol has 2 modes viz. RTU mode and ASCII mode and they can be toggled using key settings. MODBUS protocol has operation function and, settings and send function of measurement data.

2 Communication specifications

・Asynchronous method ・Half duplex communication method (Polling selecting method) ・Protocol: MODBUS protocol/usual protocol (Compatible with LE1000) ・Transmission speed:19200, 9600, 4800, 2400, 1200 bps switching possible (differs depending on

the protocol)

・Start bit:1 bit ・Data length: 7 bits/8 bits switching is possible ・Parity bit: Even (even parity)/Odd (odd parity)/Non (No parity) switching is possible ・Stop bit: 1 bit/2 bits switching over is possible ・Transmission code: Binary/ASCII (Differs depending on the protocol) ・Error check: Differs depending on the protocol ・External instrument priority communication method ・Data transmission procedure: No procedure

・Usage signal name: Send and receive data only (Without using control signal)

－2－

3 Confirmation of communication

specifications, and setting method

Go to the settings display mode by clicking the Menu key. A window opens and a list of setting items is

displayed, select

specifications and do the settings as per the requirement.

・Instrument address: Setting range from 1-99 can be entered directly using the number keys. ・Transmission speed: Select either of 9600,19200bps. ・Character: Select from the code given in the table below.

Code Length of data Parity Stop bit

Ú RTU mode is 8 bits only

・RTU/ASCII: Select either of RTU, ASCII, PRIVATE.

Confirm all the settings or finish all the setting changes then take the cursor to Set button and end after clicking the Enter key.

COM. and click the Enter key. The following settings screen is displayed. Confirm the

7E1 7E2 2 701 702 2 8N1 8N2 2 8E1 8E2 2 801 802 2

7 bits

8 bits

Even

Odd

None

Even

Odd

－3－

4 Connection

4.1 Precautions while doing the connections

4.1.1 Communication terminal

Terminal layout differs depending on the communication interface that is specified.

　 RS-422 communication terminal

　 RS-485 communication terminal

Short circuit SDA and RDA

ＲＳ－４２２Ａ

ＳＤＡ

ＳＤＢ

4.1.2 Total extension of RS-422A/485 communication cable is less than 1.2km

Wiring interval between each instrument can be anything but the total extension distance of the cable is within 1.2 kms. (Line converter LE5000 of the farthest terminal)

Line converter

ＲＤＡ

ＲＳ－４８５

ＳＧ

ＲＤＢ

ＳＡ

RD5100

Total length of cable less than 1.2 km

ＳＢ

Short circuit SDA and RDB

ＳＧ

4.1.3 Take prevention measures to prevent noise mixing.

In order to avoid the effect of noise keep a distance of minimum 50cm or more between the power line and other communication lines.

4.1.4 Always do crimp style terminal processing.

Due to one of the causes of communication defect the connection is lost. Always process the communication cable of the terminal using crimp style terminal with insulated sleeve of Ｏ type or Y type. (Terminal screws of LE5000 line converter are M3.5mm)

4.1.5 Apply terminating resistance.

In case of using RS-485 communication, apply a resistance of 100Ω to RD5100 to be placed in the last terminal. (For details refer to 4.3) (General metal coating resistance will do. It is available in this company, place an order with us.)

Ｏ type crimp style terminal

Less than 8

Ｙtype crimp style terminal

Less than 8

（㎜）

3.7 or more

Insulated sleeve

4.1.6 Number of connection machines of RD5100

For RS-485

：Maximum 31

－4－

4.2 Cable for communication

ASDA

Before connecting be prepared with cable exclusively for communication. It is available in our company also; hence you may place an order with us.

4.2.1 Communication cable for RS-422A

① Connection between line converter and LE5000

Cable

Form

Internal

connection

Format code

Ｏ type crimp style terminal Ｏ type crimp style terminal RS-422A cable (For line converter)

ＲＤＡＲＤＢＳＤＡＳＤＢＳＧ

Line converter side

It is a 2 core CVVS wire that is twisted and it is further twisted to 4 core cable and SG (Signal Grand) wire is available on both sides. As there is no SG converter on line converter side, use it after disconnecting.

RDB

SDB

RZ-CRA2□□

Cable length 1-99m (specified)

ＳＤＡＳＤＢＲＤＡＲＤＢＳＧ

LE5000 side

RDA RDB SD SDB SG

② Connection between LE5000s

Cable

Ｏ type crimp style terminal Ｏ type crimp style terminal RS-422A cable (For series)

SDA (Black)

SDB (White)

RDA (Red)

RDB (Green)

Form

SG (Blue)

LE5000 side

It is a 2 core VCTF wire that is twisted and it is further twisted to 4 core cable and SG (Signal Grand) wire is available on both sides.

Internal

connection

SDB RD RDB

RZ-CRA1□□

Format code

Cable length 01-99m (specified)

LE5000 side

SD SDB RDA RDB SG

(Black) SDA

(White) SDB

(Red) RDA

(Green) RDB

(Blue) SG

－5－

4.2.1 Communication cable for RS-485

(

)

ARDB

① Connection between line converter and RD5100

Cable

Form

Ｏ type crimp style terminal Ｏ type crimp style terminalRS-485 cable (For line converter)

RDB RD

Line converter side

It is a CVVS wire that is twisted to 2 core cable and SG (Signal Grand) wire is available in both the terminals. As there is no SG converter on line converter side, use it after disconnecting.

SA SB SG

LE5000 side

Internal

connection

Format code

② Connection between RD5100s

Cable

RZ-LEC□□□ (For line converter)

Cable length 1-200m (specified)

Ｏ type crimp style terminal Ｏ type crimp style terminalRS-485 cable

For series

SA SB

Form

Internal

connection

Format code

RD5100 side

It is a CVVS wire that is twisted to 2 core cable and SG (Signal Grand) wire is available in both the terminals.

SA SB SB

RZ-LEC□□□ (For series)

Cable length 1-200m (specified)

SA SB SG

ＳＡＳＢＳＧ

LE5000 side

－6－

4.3 RS-485 connection

Connect RS-485 communication interface to PC using line converter. As the line converter and PC use only 3 signals viz. send, receive and signal grand and no other control signal is used, wiring process in the connector needs to be similar to that of RS-232C connection. (For details refer to line converter instruction manual.)

Send

data

Receive

data

Communication cable

RZ-CRS6□□

(Wiring process is necessary.)

Internal circuit

Send

data

Receive

data

Communication cable

RZ-CRS6□□

(Wiring process is necessary.)

Internal circuit

SDA

SDB

RDA

RDB

1 2 3

9 pin connecter for PC

1 2 3

9 pin connecter for PC

Communication cable

RS-422A connection

RZ-CRA1□□

RDA

RDB

SDA

SDB

Line converter

RS-485 connection

Communication cable

RZ-LEC□□□

RDA

RDB

SDA

SDB

Communication cable RZ-LEC□□□

Line converter

ＳＤＡ

ＳＤＢＲＤＡ

ＳDＡ

Terminal resistance 100Ω

ＲＤＢＳＧ

Communication cable RZ-CRA2□□

　 Caution

Do not connect the SG wire to the earthing terminal or FG terminal of the instrument.

Terminal resistance 100Ω

RDB

RDA

ＳDＢ

RDB

RDA

ＳDＢ

RDA

ＳDＢ

RDB

　 Caution

Do not connect the SG wire to the earthing terminal or FG terminal of the instrument.

RD5100

－7－

5 MODBUS protocol

Precautions and basic procedure of communication

　 Caution

1. Error occurs if data is requested immediately after starting the power supply.

RD5100 can be communicated with, any time. Response is output anytime for the data request from PC. However at the time of starting the power supply, response is not output normally, until the data of the channel is gathered. For example, time necessary to gather data of RD5100 36 point analyzer, is around 20 seconds. If data is requested in that time Error No. 12 (Setting mode error) is returned.

2. As the control signal wire is not used, consider resending the command.

Serial interface of RD5100 communicates without using control wire. Hence consider resending the command as reception defect may occur depending on RD5100 status.

3. Do not remove any device or communication cable and do not ON-OFF the power supply during communication.

If device or cable that makes up the serial interface is removed in between or if power is switched ON or OFF, operation may stop and error may occur. If this happens reset all the devices that make up the serial interface and do the process all over again.

4. Send the next command after confirming that the communication drive is switched OFF.

In RS-485, if multiple instruments are connected in same communication line, then only 1 machine in which instrument numbers are specified from the PC, drives the communication line. At that time in order to receive all the characters in the PC for sure, let some time lapse after the last character is sent and then switch OFF the drive of communication line. If PC sends a command for the next device before it becomes OFF, then the signal crashes and normal communication is not done hence take care in case of high speed PCs. This interval is around 5ms.

－8－

5.1 Message transmission mode

There are 2 types of modes viz. RTU (Remote Terminal Unit) mode and ASCII mode and they can be selected by key settings.

(Table 1. Comparison of RTU mode and ASCII mode)

Items RTU mode ASCII mode

Interface RS-485 Communication method 0 {Half duplex asynchronous method Communication speed Transmission code Binary ASCII Error detection (Error check)

Character configuration

Message start code None Message end code None CR, LF Data time interval Less than 28 bit hours Less than 1 second

(Note) When data bit is 7 bits, “Parity bit None” is not applicable.

Vertical direction Parity Average direction CRC-16 LRC Start bit 1 bit Data bit 8 bits 7 bits, 8 bits Parity bit None, odd, even None (Note), odd, even Stop bit 1, 2 bits

5.1.1 Transmission data

9600，19200bps

：(Colon)

RTU mode is binary transmission. ASCII mode divides 8 bit binary of RTU into high order low order 4 bits and does the respective character conversion (0-9, A-F).

Example) RTU mode ASCII mode

67H

89H ABH

The message length of the RTU mode is half as compared to the ASCII mode hence the transmission efficiency is better.

36H (“6”) 37H (“7”) 38H (“*”) 39H (“9”) 41H (“A”) 42H (“B”)

5.1.2 Message frame configuration

RTU mode is made up of message part only. ASCII mode is made up of beginning character “: (colon, 3AH)”, message and end character “CR (carriage return, ODH) + LF (Line feed, OAH)”.

RTU mode ASCII Message ： Message CR LF

For the message of ASCII mode, as the beginning character is “ : ”, trouble shooting is easy. This is an added advantage.

－9－

5.2 Data time interval

RTU mode time: Less than 28 bit hours (9600bps time: 2.8msec, 19200nps time: 1.4msec) ASCII mode time: Less than 1 second

At the time of sending the message, see to it that the time interval of the data that consists of one message does not exceed the time interval mentioned above. If the time interval mentioned above is exceeded, the receiving side (this instrument), in order to judge that the sending is finished from the send side, processes an abnormal message as received data. In RTU mode message characters should be continuously send however in ASCII mode, as the interval between the characters is maximum 1 second, even though the process speed of the master (PC) is comparatively slow, it can be used.

5.3 Message configuration

MODBUS message along with RTU and ASCII mode has the following configuration.

Slave address Function code

Data

Error check

5.3.1 Slave address

Slave address is set in advance in a range of 1-31 using the key settings. Master usually communicates with 1 slave. All the devices that are connected receive the message from the master in common however, only the slave that matches with the slave address in the command message responds to that message. Slave address “0” is used in the messages (Broadcast) for all the slaves from the master. In this case slave does not return response.

5.3.2 Function code

Function code is the code to be executed in the slave and each data is roughly categorized as follows. For details refer to the reference table.

① Digital settings value:

② Digital input data:

③ Analog settings value:

④ Analog input data:

Recording ON/OFF, data print execution etc. and mainly function change parameters Parameters of external contact point input status, input data status, alarm activation status etc. Various setting information. Numeric value range is a numeric value within a range of 16 bits.

-32763 to 32767 (For details refer to reference table). Measurement data, instrument specification information etc. Numeric value range outputs a numeric value within a range of 16 bits.

－10－

(Table 2. Function code table)

Code Function Unit

02 Reading the digital input data 1 bit 03 60 62

04 Reading the analog input data 16 bits

05 Writing digital setting value 1 bit Changing the status of single coil

06 Writing analog setting value 16 bits

16 61 63

Reading digital (ON/OFF) settings

value

Reading the analog setting value 16 bits

Sending the reception data (For examination)

Writing multiple analog setting value

1 bit Reading the status of coil

MODBUS original function

(Reference)

Reading the input relay status

Reading the contents of maintenance register

Reading the contents of input register

Writing to single maintenance register

Loop back test

Writing to multiple maintenance register

5.3.3 Data part

Data structure differs depending on the function code. In case of requests from the master, it is made up of, code number (Relative number calculated from reference number mentioned hereafter) of the target data to be read and data count etc. Response from the slave consists of data etc. that is requested. Basic data of MODBUS is on a whole an integer of 16 bits and existence of a mark is decided for each data. Hence put the decimal point at a different place and make it an integer value or keep the position of the decimal fixed, and display formally using the upper and lower limit of the scale. In LE5000 there is a method of assigning a decimal point at a different position.

　 Caution

In the data part, specific numeric value such as input data is assigned as the error data. When using this data, first does error decision for the data, then combine the decimal point data. If you combine the decimal point data first, the error data is mistaken as the normal data.

5.3.4 Reference number

There is a number called “Reference number” assigned to the data in RD5100, and this number is necessary for reading and writing the data. Data in RD5100 is categorized as “Digital setting value”, “Digital input data”, “Analog input data” and “Analog setting value” depending on its type. Number specification in the message is done by “Relative number” that corresponds to the respective reference number.

(Table 3. Reference number and relative number)

Data type Reference number Relative number

Digital setting value 1 to 1000 Reference number-1 Coil Digital input data 10001 to 20000 Reference number-10001 Input relay Analog input data 30001 to 40000 Reference number-30001 Input register Analog setting value 40001 to 50000 Reference number-40001 Maintenance register

Example) “100”becomes the relative number of channel 1 data of “Reference number 30101”.

－11－

MODBUS original

(Reference)

(Table 4. Reference number)

Data type Parameter

Key lock Recording ON/OFF

Digital setting value

Digital input data

Analog input data

Analog setting value

Feed Print list Print message Data print External drive status (Contact point input) Measurement data status Alarm status Function information Measurement data Channel common setting 1

Clock setting External drive functional settings Arbitrary intermittent period setting Channel speed setting Data interval recording setting Logging recording setting Data print setting Select recording format Parallel pointer scale setting Alarm dead band setting

Setting for each channel

Range number setting RJ internal/external setting Range setting Scale setting Burn out setting Sensor correction Digital filter Unit settings Tag settings Alarm settings Calculation settings Recording scale settings Calculation constant setting Difference calculation setting Partial reduction magnification recording Parallel pointer scale settings

Auto range settings Each channel settings Memory card settings Print communication Setting for each intermittent number Data communications input Setting common to channels

Reference

number

1 to 50

10001 to 11500 02 (READ) 5.8.2 Clause

30001 to 30050 30101 to 30300 40001 to 40200 40001 to 40008 40009 to 40017

40018

40019 to 40027 40033 to 40037

40038 to 40042 40043 40049 40050 to 40075 40081 40102 to 47300 40102 40103 40104 to 40106 40107 to 40109 40110 40 111 40112 40119 to 40122 40125 to 40128 40133 to 40163 40165 40166 to 40168 40169 to 40176 40177 to 40180 40181 to 40187

40188

40189 to 40194 40202 to 47300 47906 to 47920 48003 to 48050 48101 to 48850

49001 to 49100 49101 to 49150

Corresponding

function code

01 (READ) 05 (WRITE)

04 (READ) 5.8.3 Clause

03 (READ) 06 (WRITE) 16 (WRITE)

Reference

table

5.8.1 Clause

5.8.4 Clause

－12－

(Table 4. Reference number for RD5200/RD5300)

Data type Parameter

Calculation character string

Analog input setting value

Analog input data

(RD5200 only) RD5300 responds with option Channel parameter of CH101 to CH599 (LE5300 only) CH73 to CH599 Reading measurement data

Reference

number

23720 to 27250

40101 to 47300

30245 to 31300 04 (READ)

Corresponding

function code

62 (READ) 63 (WRITE)

60 (READ) 61 (WRITE)

Reference

table

5.8.5 Clause

－13－

5.3.5 Error check

Error check of transmission frame differs depending on the mode. RTU mode: CRC-16 ASCII mode: LRC

5.3.5.1 Calculation of CRC-16

CRC method divides using generating polynomials, the information to be sent and sends the rest of the information by attaching it. Generating polynomials are as follows.

1 + X

Calculate to the target from slave data up to the end of the data by the following procedure.

1) Initialization (=FFFFH) of data of CRC-16 (consider as X)

2) Exclusive logical OR of data 1 and X (EX-OR) → X

3) Shift X 1 bit to the right → X

4) If there is a carry, get A001H and EX-OR else go to 5). → X

5) Repeat 3) and 4) until it shifts 8 times.

6) Following data and EX-OR of X.→ X

7) Same as 3) - 5).

8) Repeat till the last data.

9) Create message in the order, low order and high order of calculated 16 bit data (X).

+ X

+ X16

Example) When data is 02H 07H , CRC becomes 1241H

hence error check data becomes 41H 12H .

Reference: CRC-16 calculation program

10 D(1) = &H2 : D(2) = &H7 : N = 2 20 GOSUB *CRCMAKE 30 END 40 100 *CRCMAKE 110 CRC = &HFFFF 120 FOR I = 1 TO N 130 CRC = CRC XOR D(I) 140 FOR J = 1 TO 8 150 CY = CRC AND &H1 160 IF CRC < 0 THEN P = &H4000 ELSE P = 0: GOTO 180 170 CRC = CRC AND &H7FFF 180 CRC = CRC ¥ 2 190 CRC = CRC OR P

200 IF CY = 1 THEN CRC = CRC XOR &HA001 210 NEXT J 220 NEXT I 230 IF CRC < 0 THEN P = &H80 ELSE P = 0: GOTO 250 240 CRC = CRC AND &H7FFF 250 C1 = CRC AND &HFF 260 C2 = ( CRC AND &H7F00 ) ¥ 256 270 C2 = C2 OR P 280 D (N+1) = C1 : D(N+2) = C2 290 RETURN

－14－

5.3.5.2 LRC calculation method

Calculate to the target from slave data up to the end of the data by the following procedure.

1) Create message in RTU mode.

2) Add from the beginning (slave address) of the data to the end. →X

3) Get the complement (Bit inversion) of X. →X

4) Subtract 1. (X=X+1)

5) Attach X as LRC at the end of the message.

6) Convert everything into ASCII character.

Example) When data is 02H 07H ; LRC becomes F7H hence binary message becomes

02H 07H F7H and ASCII message becomes

30H 32H 30H 37H 46H 37H .

5.3.6 Precautions at the time of data processing

① As the measurement data and decimal point position are assigned to different numbers, it is

necessary to use the information of both at the time of replaying the data.

② As each 1 data can be accessed (changed), precautions are necessary at the time of setting the

associated data. For example, Initialization process etc. of the associated data due to change in range number. Process contents are mentioned in reference number table.

③ At the time of executing settings by key (in case of setting status by Enter key), settings by

communication cannot be received. To avoid this first do the key lock and then do the settings by communication.

④ Read and write the data in the range stipulated by the reference number. In case of reading and

writing for reference number that is other than stipulated reference number, instrument operation may be affected

⑤ Reading and writing to multiple reference numbers that are not in series is also possible but if

reference number that is not stipulated is the starting number then an error (error 02H) occurs.

⑥ At the time of reading multiple reference numbers, the data of the reference number that is not

stipulated becomes “0”.

⑦ In case of writing to multiple reference numbers, if error is detected, all the settings become

disabled.

－15－

5.4 Method of creating a message

Message consists of ①Step address, ②Function code, ③Data part, and ④Error check code. (Refer to

5.3)

Message that can be read once is within the following range.

Data count 120 units

Method of creating a message is explained in the following example.

Example) Reading the measurement data of RD5100 “Channel 1” of “Slave address 02”

5.4.1 RTU mode message

① Slave address: 02 ( 02H ) ② Function code: 04 ( 04H )

It is “Reads the analog input data (Reading the contents of input register)”. When function code is “04”; specify the “relative number of data 2 bytes” to be read in data part and “data count 2 byte” to be read. (Refer to 5.3. Refer to 5.3.2 for “Function code: 04”) ÚIt is necessary to confirm the number of bytes of data.

③ Data part: Relative number 100 ( 00H 64H ) at the beginning,

count 2 ( 00H 02H )

Measurement data (analog input data) is stored in reference number “30001 to 40000” (Refer to 5.3.4 Table 3). As per the reference table it is understood that integer part of CH1 is stored in “30101”and decimal point position is stored in "30102". (For reading the measurement data, refer to 5.5.4.) Relative number of beginning “reference number 30101” is 30101-30001=100, if it is expressed in 2 bytes it becomes “ 00H 64H ” (Refer to 5.3.4). Count of data to be read is the integer part CH. 1 and decimal point position “2” and if it is to be expressed in 2 bytes it becomes “

00H 02H ”.

④ Error check: Calculated by CRC-16 2730H ( 30H 27H )

Error check in RTU mode is done by CRC-16. (Refer to 5.3.5.1) Data of basic part of message is 02H 04H 00H 64H 00H 02H as per ①-③, and CRC-16 is 2730H.

Thus the error check data is

30H 27H

⑤ Message: Message is created with the configuration

02H

04H 00H 64H 00H 02H 30H 27H . (Refer to 5.3)

－16－

5.4.2 ASCII mode message

Error check LRC is calculated from basic part of the message. LRC is 94H. (Refer to 5.3.5.2). Convert every data of basic part to ASCII code, also convert LRC to ASCII code and attach it to the basic part. Add the starting character " : " of the message and, “CR”, “LF” at the end.

3AH 30H 32H 30H 34H 30H 30H 36H 34H

30H 30H 30H

[:]

02H 04H 00H

32H 39H 34H 0DH 0AH

00H 02H

94H

LRC

64H

5.5 Function code

Response for each function is given below. (Refer to <Table 2 Function code table> in 5.3.2)

Note) Refer to 5.6 for responses at the time of abnormality.

5.5.1 Reading digital settings value (Reading coil status)

[Function code:01 (01H)] Only the specified count reads “digital (ON/OFF) settings value of series of numbers”, from specified number. ON/OFF data consists of reply message data wherein 8 units are arranged in numerical order in 1 data (1 byte). LSB (DO side) of each data is the digital data of young number. When the read count is not in multiples of 8, the unnecessary bits become 0.

Example) Reading 10 units from digital setting value reference number 17 to 26 of slave 2.

Reference number Data ON OFF ON OFF OFF - - - - -

(RTU mode) Master → Instrument Slave address 02H Function code 01H Starting number (H) 00H Starting number (L) 10H Count (H) 00H Count (L) 0AH CRC (L) 7FH CRC (L) BDH CRC (H) 6DH CRC (H) FBH

〈ASCII mode error check〉 Error check CRC (L), CRC (H) parts are as follows.

LRC E3H

Note) Starting number (Relative number) is “Reference number -1”. (Decimal 16 (=17-1) →

Note) Data count is number of bytes of data.

17 18 19 20 21 22 23 24 25 26

Recording

Hexadecimal 10H)

(It differs from request count. In the example request count is 10 units and data count is 2)

Feed

OFF

List

Execute

Instrument → Master (Normal)

Slave address 02H Function code 01H Data count 02H Initial 8 data 05H Next 8 data 02H

LRC F4H

Title

OFF

Data print

OFF

First 8 data

0 0 0

24 17

Reference number

Next 8 data

0 0 0 0 0 1 0 0

Reference number

1 0 0 1

（05H）

（02H）

26 25

－17－

5.5.2 Reading the digital input data (Reading the status of input relay)

[Function code: 02(02H)]

Only the specified count reads “digital (ON/OFF) input data of series of numbers”, from specified

number. ON/OFF data consists of reply message data where in 8 units are arranged in numerical order

in 1 data (1 byte). LSB (DO side) of each data is the digital data of the young number. When the read

count is not in multiples of 8, the unnecessary bits become 0.Response example is similar to “Function

code 01”. However starting number (Relative number) is “Reference number - 10001”.

5.5.3 Reading analog settings value (Reading the contents of maintenance register)

[Function code: 03 (03H)/60 (3CH)/62 (3EH)]

Only the specified count reads “analog settings value (2 bytes:16 bits) data” of series of numbers, from specified numbers. Data consists of response message data, arranged in numeric order and split into high order 8 bits and low order 8 bits.

Example) Reading the clock information “Year month date” of slave 2.

(Reading of 3 analog settings value reference number from 40001 to 40003 of slave 2.)

Reference number

Data

(RTU mode)

Master → Instrument Slave address 02H Function code 03H Starting number (H) 00H Starting number (L) 00H

Count (H) 00H Count (L) 03H Data of Month (H) 31H CRC (L) 05H Data of Month (L) 32H CRC (H) F8H Data of Date(H) 32H

〈ASCII mode error check〉

LRC F8H

Note) Starting number (Relative number) is “Reference number - 40001”. (Decimal 0 (=40001-40001)

→ Hexadecimal 00H)

Note) When function code is 62, “Reference number - 20001”

Note) Data count is number of bytes of data.

(It differs from request count. In the example Request count is 3 and data count is 6)

Note) There is a limitation on the data count of the message (that this instrument can send) that can

be received at a time.

(Refer to 5.4)

40001 40002 40003

(3938H)

(3132H)

(3235H)

Instrument → Master (Normal) Slave address 02H Function code 03H Data count 06H Data of Year(H) 39H

Data of Year (L) 38H

Data of Date (L) 35H CRC (L) EBH CRC (H) 6DH

LRC BAH

Example) Data of December 25, 1998

5.5.4 Reading the analog input data (Reading the contents of input register)

[Function code: 04 (04H)] Only the specified count reads “analog settings value (2 bytes: 16 bits) data” of series of numbers, from specified numbers. Data consists of response message data arranged in numeric order and split into high order 8 bits and low order 8 bits. Response example is similar to “Function code 03”. However starting number (Relative number) is "Reference number - 30001".

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5.5.5 Writing digital settings value (Changing the status of single coil)

[Function code: 05 (05H)] Consider digital settings value of specified number as specified status (ON/OFF).

Example) Executing ‘Print message’ of slave 2. (Switch ON the digital settings value reference number

20 of slave 2.

(RTU mode) Master → Instrument Instrument → Master (Normal) Slave address 02H Slave address 02H Function code 05H Function code 05H Settings value number (H) 00H Settings value number (H) 00H Settings value number (L) 13H Settings value number (L) 13H Settings status (H) FFH Settings status (H) FFH Settings status (L) 00H Settings status (L) 00H CRC (L) 7DH CRC (L) 7DH CRC (H) CCH CRC (H) CCH

〈ASCII mode error check〉

LRC E7H

Note) In case of normal response, response is same as that of command message.

Note) Setting value number (Relative number) is “Reference number -1”. (Decimal 19 (=20-1) →

Hexadecimal 13H)

Note) ”FF00HH” is set at the time of execution. In key lock and recording ON/OFF, “000H” is set in

case of OFF and “FF00H” is set in case of ON.

Note) If slave address is 0 all the slaves execute this command. But no slave address responds.

LRC E7H

5.5.6 Writing analog settings value (Writing to unit maintenance register)

[Function code:06 (06H)]

Analog settings value of specified number is considered to be the specified value.

Example) Alarm dead band of slave 2 is set to 0.5%.

(Consider “5” as analog settings value reference number 40081 of slave 2.)

(RTU mode)

Master → Instrument Slave address 02H Function code 06H Settings value number (H) 00H Settings value number (L) 50H Setting data (H) 00H Setting data (L) 05H CRC (L) 49H CRC (H) EBH

〈ASCII mode error check〉

LRC A3H

Note) In case of normal response, response is same as that of command message.

Note) Setting value number (Relative number) is “Reference value -40001”. (Decimal

80(=40081-40001) → Hexadecimal 50H)

Note) If slave address is 0 all the slaves execute this command. But no slave address responds.

Instrument → Master (Normal) Slave address 02H Function code 06H Settings value number (H) 00H Settings value number (L) 50H Setting data (H) 00H Setting data (L) 05H CRC (L) 49H CRC (H) EBH

LRC A3H

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5.5.7 Loop back test

[Function code: 08 (08H)]

Transmission check is performed between master slaves. Responding is done depending on the

specified diagnosis code. In this instrument “return check to send the received data as it is” is

performed and diagnosis code “0000H” is fixed.

Example) Execute "loop back test" in slave 2

(RTU mode)

Master → Instrument Instrument → Master (Normal) Slave address 02H Slave address 02H Function code 08H Function code 08H

Diagnosis code (H) Diagnosis code (L) 00H Diagnosis code (L) 00H Optional data * Received data * Optional data * Received data * CRC (L) * CRC (L) * CRC (H) * CRC (H) *

Fixed

00H Diagnosis code (H)

Fixed

00H

5.5.8 Writing multiple analog setting values (Writing to multiple maintenance register)

[Function code: 16 (10H)/61 (3DH)/63 (3FH)] Analog settings value of count specified from the specified number, is considered to be the specified value. Data is split into high order 8 bits and low order 8 bits and arranged in numerical order and then sent. Example) Time of slave 2 is set as 15 hours 30 minutes 00 seconds.

(Set 3 analog settings value reference number of slave 2, from 40004 to 40006.)

Reference number 40004 40005 40006

Data

(RTU mode)

Master → Instrument Slave address 02H Function code 10H Starting number (H) 00H Starting number (L) 03H Count (H) 00H Count (L) 03H Data count 06H

First data (H) 31H First data (L) 35H

Second data (H) 33H Second data (L) 30H Third data (H) 30H Third data (L) 30H CRC (L) 80H CRC (H) 36H

〈ASCII mode error check〉

LRC B9H

Note) Starting number (Relative value) is “Reference number - 40001”. (Decimal 3 (=40004-40001) →

Hexadecimal 03H)

Note) When function code is 63, “Reference number - 20001”

Note) If slave address is 0 all the slaves execute this command. But no slave address responds. Note) There is a limitation on the data count of the message (that this instrument can receive) that can

be sent at a time. (Refer to 5.4)

(3135H)

(3330H)

Instrument → Master (Normal) Slave address 02H

Function code 10H Starting number (H) 00H Starting number (L) 03H Count (H) 00H Count (L) 03H CRC (L) 70H CRC (H) 3BH

LRC E8H

(3030H)

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5.6 Process during abnormality

Response is as follows when there is an error in the contents of the message from master.

5.6.1 For no response

In the following cases the message is ignored and there is no response.

① When transmission error (over run, framing, parity, CRC or LRC) is detected in the message. ② When the slave address in the message is not one’s own address. ③ When the data interval of the message is long.

RTU mode... 28 bits or more ASCII mode…1 second or more

④ When transmission parameter does not match. ⑤ When received message exceeds 512 bytes.

Note 1) In write function when slave address is “0”, message is executed if there is no error in the

message, but there is no response. Also there is no response in case of overwriting error in the message. Hence when slave address is "0", whether normal or abnormal cannot be judged just by response.

Note 2) When using USB and TCP/IP, respond by using the following formats except with errors at the

physical layer.

Slave address

88H Error code CRC(L) CRC(H) Error code

99H: CR error

5.6.2 Error message response

In the contents of the message from the master, if following error is detected and not the error in 5.6.1, code showing those error contents responds as “error message”. Format of the error message is as follows.

Slave address Function code+80H

Error code CRC (L) CRC (H)

Function code Function code+80H

01 81H 02 82H 03 83H 04 84H 05 85H 06 86H 08 88H 16 90H 60 BCH 61 BDH 62 BEH 63 BFH 70 C6H 71 C7H

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Error codes are as follows

Error code Contents

01H

02H

Function code defect

When function code that is not specified is received

Relative number (Reference number) defect

When received starting number or settings value number are other than specified

Data count defect

In case of any of the following

① When received function code and data count do not match

In case of function code “16”, when “data count” is not twice that of “count”

03H

In case of function code “16”, when data count does not match with the “received data

count”.

② When count of the data to be sent in response to the received message exceeds the

specified count

Maximum 120 units

Out of setting value range (Set error)

In case of any of the following

① When month, day, hours, minutes and range no. is other than specified ② When settings value (binary) exceeds the range “-30000 to 30000” ③ When data communication input data (binary) exceeds the range “-32765 to 32765”

However, exceeding binary expression (-32768), data exceeding the range (32767 or

11H

-32767), burn out data (32766), invalid data (-32766) can be received.

④ When decimal point data exceeds the range “0-3” ⑤ When time interval settings of ‘fixed time recording’ cannot be executed due to chart

speed

⑥ When there is a contradiction in the direction of increase and decrease in ‘partial

reduction magnification settings’ and auto range settings

⑦ When RJ internal settings are out of thermocouple input range

Cannot be set

① When message is received in any of the following cases

Immediately after starting the power supply during initialization (When this instrument

is performing initial display)

Pointer scale connection mode Check mode

12H

② When setting message is received in any of the following cases

At the time of setting, using the front key or at the time of setting confirmation When ”data print”, “list” command is received during recording OFF status

When parameter settings of multiple channels is received in parameter settings of

each channel

When parameter settings of option function that is not loaded are received

(“0” is sent as response for the read message.)

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