Kofloc EX-700R User manual

MJ400269A1
Mass Flow Meter with indicator
EX-700R
RS-485 Communications Instruction Manual

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Table of Contents
1. Foreword・・・・・・・・・・・・・・・・・・・・・・ 2
2. RS-485 Communications・・・・・・・・・・・・・・・・ 2
3. Modbus Function Codes supported・・・・・・・・・・・・ 3
4. Data・Address list・・・・・・・・・・・・・・・・・・・ 4
5. Flow Rate Expression・・・・・・・・・・・・・・・・・ 5

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1. Foreword
This document describes the specifications and handling of the Modbus (RTU) function. With
reference to the Modbus (RTU) standard, please prepare for it by yourself.
The wiring, installation and operating procedures, other than communications, are presented in a
separate instruction manual. Prior to use, please read it also.
2. RS-485 Communications
Synchronization Start-stop
Transmission speed 38400/19200/9600bps (Parameter: P-41)
Start bit 1bit
Data length 8bit
Stop bit 1bit
Parity No parity/Odd parity/Even parity (Parameter: P-42)
Transmission system 3-wire half-duplex
Insulation Communication – control circuit: Uninsulated
Communication – power supply: Uninsulated
Communication ID
setting range 1-247 (Paremeter: P-40)

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３．
Modbus Function Codes supported
Read Coil Status 0x01
Read Input Status 0x02
Read Holding Register 0x03
Read Input Register 0x04
Force Single Coil 0x05
Preset Single Register 0x06
ZERO Adjustment 0x41
Details of Vendor-defined function (ZERO Adjustment)
Queries
Response
Communication ID 8bit
Function code 0x41
Error check CRC (16 bit)
Communication ID 8 bit
Function code 0x41
Error check
CRC (16bit)
Sensor zero adjustment is executed.

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4. Data・Address list
Category Address Name Description of set values
00001 (P-01) Low cut
0: Instantaneous flow rates below 0.5% F.S. are indicated. Negative values are
also indicated.
1: Instantaneous flow rates below 0.5% F.S. are indicated as 0. Negative values
are also indicated as 0.
00002 (P-04)Integrated flow rate hold
0: The integrated flow rate value is reset when the power is turned off.
1: The integrated flow rate value is held after the power is turned off. The
integrated flow rate value hold cycle is 1 minute.
Input Status 10001 Flow rate unit 0: cc, 1: L
30001 Full scale flow rate [significand] Mantissa portion of the full scale flow rate currently set for operation 0001 ～
2000
30002 Flow rate decimal point position
[number of decimal places] 0: none, 1: digit, 2: digit, 3: digit
30003 Instantaneous flow rate
[significand] -9999 ～9999 (As per the specifications)
40001 (P-30)Applicable gas 0: CF value, 1: N2(nitrogen), 2: Air, 3: H2(hydrogen), 4: He(helium), 5:
Ar(argon), 6: O2(oxygen), 7: CO2(carbon dioxide), 8: CH4（methane）
40002 (P-31)CF value 0500 ～1500 (0.500 ～1.500)
40003 (P-00)Reference condition on
flow rate
0: 20℃(1atm), 1: 0℃(1atm), 2: 25℃(1atm）
40004 (P-02)PV filter
0: No
1: Moving average of sampling 2 times
2: Moving average of sampling 4 times
3: Moving average of sampling 8 times
4:Moving average of sampling 16 times
5: Moving average of sampling 32 times
40005 (P-03) Instantaneous flow rate
indication update cycle
0: 25(ms), 1: 50(ms), 2: 100(ms), 3: 200(ms), 4: 500(ms), 5: 1(sec)
40006 Integrated flow rate reach preset
setting upper 4 digits
0000 ～9999
40007 Integrated flow rate reach preset
setting lower 4 digits
0000 ～9999 (Mantissa portion not including the decimal point)
40008 (P-10)Event output 1
00: None
10: Instantaneous flow rate upper limit : ON
11: Instantaneous flow rate upper limit : OFF
20: Instantaneous flow rate lower limit : ON
21: Instantaneous flow rate lower limit : OFF
30: Instantaneous flow rate upper/lower limit : ON
31: Instantaneous flow rate upper/lower limit : OFF
40: Integrated flow rate reach : ON
41: Integrated flow rate reach : OFF
50: Integrating pulse : ON
51: Integrating pulse : OFF
※
ON: Normal output, OFF: Inverted output
40009 (P-11)Instantaneous flow rate
upper limit preset setting
0000 ～9999
40010 (P-12)Instantaneous flow rate
lower limit preset setting
0000 ～9999
40011 (P-13)Dead time 00 ～30(sec)
40012 (P-14)Integrated flow rate reach
preset setting upper 4 digits 0000 ～9999
40013 (P-15)Integrated flow rate reach
preset setting lower 4 digits 0000 ～9999
Coil
Input
Register
Holding
Register

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40014 (P-20)Event output 2
00: None
10: Instantaneous flow rate upper limit : ON
11: Instantaneous flow rate upper limit : OFF
20: Instantaneous flow rate lower limit : ON
21: Instantaneous flow rate lower limit : OFF
30: Instantaneous flow rate upper/lower limit : ON
31: Instantaneous flow rate upper/lower limit : OFF
40: Integrated flow rate reach : ON
41: Integrated flow rate reach : OFF
50: Integrating pulse : ON
51: Integrating pulse : OFF
※
ON: Normal output, OFF: Inverted output
40015 (P-21)Instantaneous flow rate
upper limit preset setting
0000 ～9999
40016 (P-22)Instantaneous flow rate
lower limit preset setting
0000 ～9999
40017 (P-23)Dead time 00 ～30(sec)
40018 (P-24)Integrated flow rate reach
preset setting upper 4 digits
0000 ～9999
40019 (P-25)Integrated flow rate reach
preset setting lower 4 digits
0000 ～9999
Holding
Registe
5. Flow Rate Expression
The maximum full scale flow rate, full scale flow rate, instantaneous flow rate, set flow rate
(digital) and set flow rate are expressed by a combination of the significand and flow rate
decimal point position [number of decimal places] and flow rate unit.
Note that flow rate decimal point position [number of decimal places] and flow rate unit are
used commonly for each flow rate and cannot be changed.
Examples are presented below:
Full scale flow rate [significand] 1000
Flow rate decimal point position
[ number of decimal places]
1: 1digit
Flow rate unit 0: cc
Full scale flow rate 100.0 (cc)
Full scale flow rate [significand] 1234
Flow rate decimal point position
[ number of decimal places]
3: 3digit
Flow rate unit 1: L
Instantaneous flow rate 1.234 (L)

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