AF1
Flow measurement transmitter
Modbus RTU - Manual
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AF1 – Modbus Manual
AF1_Modbus_Protocol_V1.docx
Instruction Manual
© 2016 ROTRONIC AG 2 / 20
Table of contents
1 Introduction ............................................................................................................................ 3
2 Document description ............................................................................................................ 3
3 System overview .................................................................................................................... 3
3.1 Hardware Interface ......................................................................................................... 3
3.2 RS‐485 Slave Address, Baud rate, Data format ................................................................ 3
3.3 About Modbus (ref PI–MBUS–300) ................................................................................. 3
4 Holding registers .................................................................................................................... 4
4.1 Measurement Engineering (ex: ModScan) ....................................................................... 4
4.2 Output configuration (ex: ModScan) ................................................................................ 4
4.3 Application Engineering (ex: ModScan) ........................................................................... 6
4.4 Additional engineering ..................................................................................................... 7
4.5 Command Table of Factory Command ............................................................................ 7
4.6 Interpolation Engineering (ex: ModScan) ......................................................................... 8
4.7 Software engineering ...................................................................................................... 9
5 Device specific actions ......................................................................................................... 11
5.1 Read Flow Velocity [m/s] IEEE 754 ................................................................................ 11
5.2 Read Flow Velocity [m/s] 32‐bit Integer .......................................................................... 12
5.3 Read Serial No. ............................................................................................................. 13
5.4 Read Firmware Version ................................................................................................. 14
5.5 Disable Protection of Read Only Registers ..................................................................... 15
5.6 Clean Interpolation Points .............................................................................................. 16
5.7 Add Interpolation Points ................................................................................................. 17
5.8 Set Velocity Offset ......................................................................................................... 18
5.9 Set Temperature Offset .................................................................................................. 19
6 Document Version ............................................................................................................... 20
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AF1 – Modbus Manual
AF1_Modbus_Protocol_V1.docx
Instruction Manual
© 2016 ROTRONIC AG 3 / 20
1 Introduction
Congratulations on the purchase of your new AF1-Series measurement transducer! Read
these short instructions through carefully before installing the device.
2 Document description
This document describes the protocol details of Modbus for the AF1-Series
3 System overview
3.1 Hardware Interface
The interface on the sensor is RS‐485.
Hardware named D+, D‐
Meet the standards TIA/EIA‐232‐F and TIA/EIA‐485‐A
3.2 RS‐485 Slave Address, Baud rate, Data format
Slave Address: 1…247
Baud rate: 9600, 19200, 38400, 57600, 115200
Parity: None, Even, Odd
Data length: 8 bit
Stop bit: 1 or 2 bit
Default Address = 1, Data format= 9600, N81
3.3 About Modbus (ref PI–MBUS–300)
Support RTU mode
Broadcast support (Address 0)
Bit addressable items (i.e. Coils and Discrete inputs) will not be implemented
Measurement Values are represented in IEEE 754 single‐precision 32‐bit floating point type
http://en.wikipedia.org/wiki/IEEE_754
Modbus protocol structure:
o 1st byte: Address (1…247)
o 2nd byte: Function code (1 byte)
o 3…Nth bytes: Data bytes
o N+1st …N+2nd byte: CRC (16 bits), LSB first
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AF1 – Modbus Manual
AF1_Modbus_Protocol_V1.docx
Instruction Manual
© 2016 ROTRONIC AG 4 / 20
4 Holding registers
4.1 Measurement Engineering (ex: ModScan)
Item No.
Address
Address HEX
Parameter
Point Type
Data Type
Unit
Value
1 1 0001H
OUT1
(Configurable)
[1]
Holding Register
Floating Pt.
‐‐ 2 4 0004H
OUT2
(Configurable)
[2]
Holding Register
Floating Pt.
‐‐
3 8
0008H
Raw Flow
Velocity
Holding Register
Floating Pt.
m/s
4
12
000CH
CTA Voltage
Holding Register
Floating Pt.
Volt
[1][2]
Parameter could be configured by output configuration registers
4.2 Output configuration (ex: ModScan)
OUT1 Register Group
Item
No.
Address
Address
HEX
Register
Description
Possible Value
1
83
0053H
OUT1 Type
Type Selection
0: Voltage
1: Current
2
85
0055H
Analog Upper
Analog OUT1 Upper
0...10 (Volt) or 0...20
(mA)
3
87
0057H
Analog Lower
Analog OUT1 Lower
0...10 (Volt) or 0...20
(mA)
4
89
0059H
Output Quantity
OUT1 Quantity Selection
0: Flow Velocity
1:Sensor Temp
2:None
3:Board Temp
4:CTA Volt
5
91
005BH
Digital Upper
Digital OUT1 Upper
-32768...32767
6
93
005DH
Digital Lower
Digital OUT1 Lower
-32768...32767
7
95
005FH
Response Rate
Response Rate, Additional
6 Seconds of T90 / Step
0...100
(0:Low, 100:Fast)
8
97
0061H
Alarm Mode
OUT1 Acts Alarm Mode
0: Disable, 1: Enable
9
99
0063H
Alarm Upper
Alarm On Trigger x10
< 32767 or Digital Upper
(Scale 1/10)
10
101
0065H
Alarm Lower
Alarm Off Trigger x10
> -32768 or Digital
Lower (Scale 1/10)
11
103
0067H
Level Upper
Alarm On Output x10
0...100 (Volt) or 0...200
(mA) (Scale 1/10)
12
105
0069H
Level Lower
Alarm Off Output x10
0...100 (Volt) or 0...200
(mA) (Scale 1/10)
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AF1 – Modbus Manual
AF1_Modbus_Protocol_V1.docx
Instruction Manual
© 2016 ROTRONIC AG 5 / 20
OUT2 Register Group
Item
No.
Address
Address
HEX
Register
Description
Possible Value
1
107
006BH
OUT2 Type
Type Selection
0: Voltage
1: Current
2
109
006DH
Analog Upper
Analog OUT2 Upper
0...10 (Volt) or 0...20
(mA)
3
111
006FH
Analog Lower
Analog OUT2 Lower
0...10 (Volt) or 0...20
(mA)
4
113
0071H
Output Quantity
OUT2 Quantity Selection
0: Flow Velocity
1:Sensor Temp
2:None
3:Board Temp
4:CTA Volt
5
115
0073H
Digital Upper
Digital OUT2 Upper
-32768...32767
6
117
0075H
Digital Lower
Digital OUT2 Lower
-32768...32767
7
119
0077H
Response Rate
Response Rate, Additional
6 Seconds of T90 / Step
0...100
(0:Low, 100:Fast)
8
121
0079H
Alarm Mode
OUT2 Acts Alarm Mode
0: Disable, 1: Enable
9
123
007BH
Alarm Upper
Alarm On Trigger x10
< 32767 or Digital Upper
(Scale 1/10)
10
125
007DH
Alarm Lower
Alarm Off Trigger x10
> -32768 or Digital
Lower (Scale 1/10)
11
127
007FH
Level Upper
Alarm On Output x10
0...100 (Volt) or 0...200
(mA) (Scale 1/10)
12
129
0081H
Level Lower
Alarm Off Output x10
0...100 (Volt) or 0...200
(mA) (Scale 1/10)
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AF1 – Modbus Manual
AF1_Modbus_Protocol_V1.docx
Instruction Manual
© 2016 ROTRONIC AG 6 / 20
4.3 Application Engineering (ex: ModScan)
Item
No.
Address
Address
HEX
Parameter
Point Type
Data Type
Unit
Value
1
1025
0401H
Flow Velocity
Holding Register
Floating Pt.
m/s 2
1029
0405H
Flow Velocity
Holding Register
Floating Pt.
ft/s 3
1033
0409H
Flow Velocity
Holding Register
Floating Pt.
km/h
4
1037
040DH
Flow Velocity
Holding Register
Floating Pt.
mph 5
1041
0411H
Flow Velocity
Holding Register
Floating Pt.
knot 6
1045
0415H
Temperature
Holding Register
Floating Pt.
℃
7
1049
0419H
Temperature
Holding Register
Floating Pt.
℉
8
1057
0421H
Flow Velocity
Holding Register
32‐bit Integer
m/s
x10000
9
1061
0425H
Flow Velocity
Holding Register
32‐bit Integer
ft/s
x10000
10
1065
0429H
Flow Velocity
Holding Register
32‐bit Integer
km/h
x10000
11
1069
042DH
Flow Velocity
Holding Register
32‐bit Integer
mph
x10000
12
1073
0431H
Flow Velocity
Holding Register
32‐bit Integer
knot
x10000
13
1077
0435H
Temperature
Holding Register
32‐bit Integer
℃
x10000
14
1081
0439H
Temperature
Holding Register
32‐bit Integer
℉
x10000
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AF1 – Modbus Manual
AF1_Modbus_Protocol_V1.docx
Instruction Manual
© 2016 ROTRONIC AG 7 / 20
4.4 Additional engineering
Item
No.
Starting Address
Parameter
Data
Bytes
Data Type
Unit
Value
Hi byte
Lo Byte
Information
1
00
4B
FW Check Sum
2 bytes
unsigned Integer
2
00
8B
Temperature Max. (℃)
2 bytes
signed Integer
℃
X100
3
00
8D
Temperature Min. (℃)
2 bytes
signed Integer
℃
X100
4
00
B1
OUT1 Calib Voltage
2 bytes
unsigned Integer
mV 5
00
B3
OUT1 Calib Current
2 bytes
unsigned Integer
uA 6
00
B5
OUT2 Calib Voltage
2 bytes
unsigned Integer
mV 7
00
B7
OUT2 Calib Current
2 bytes
unsigned Integer
uA 8
01
BD
Flow Velocity Max.
2 bytes
signed Integer
m/s 9
01
BF
Flow Offset
4 bytes
IEEE 754
m/s 10
01
C3
Temperature Offset
4 bytes
IEEE 754
℃
11
02
7D
Calibration Year
2 bytes
unsigned Integer
Year
12
02
7F
Calibration Date
2 bytes
unsigned Integer
High Byte:
Month
Low Byte:
Day
13
03
01
Factory Command
2 bytes
unsigned Integer
Refer to
Command
Table
03
03
Argument
2 bytes
unsigned Integer
4.5 Command Table of Factory Command
Item
No.
Factory Command
Argument
Description
Unit
Value
Hi byte
Lo Byte
Information
1
03
01
0E5FH
Disable Registers
[1]
Read Only
2
09
01
FFFFH
Reset Interpolation Table
3
09
01
0...9
Delete Specify Index of Point
4
09 02
Standard Velocity
Add data point at current
flow velocity
[2]
m/s X100
[1]
Registers are read only until unit accepts this command except protocol registers and output
configuration registers.
[2]
It recommends add, delete or cleanup interpolation point through factory command rather than access
interpolation registers directly.
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AF1 – Modbus Manual
AF1_Modbus_Protocol_V1.docx
Instruction Manual
© 2016 ROTRONIC AG 8 / 20
4.6 Interpolation Engineering (ex: ModScan)
Item
No.
Address
Address
HEX
Parameter
Data Type
Unit
Value
1
557
0022DH
Unit Flow Velocity of Point1
Floating Pt.
m/s
2
561
00231H
Unit Flow Velocity of Point2
Floating Pt.
m/s
3
565
00235H
Unit Flow Velocity of Point3
Floating Pt.
m/s
4
569
00239H
Unit Flow Velocity of Point4
Floating Pt.
m/s
5
573
0023DH
Unit Flow Velocity of Point5
Floating Pt.
m/s
6
577
00241H
Unit Flow Velocity of Point6
Floating Pt.
m/s
7
581
00245H
Unit Flow Velocity of Point7
Floating Pt.
m/s
8
585
00249H
Unit Flow Velocity of Point8
Floating Pt.
m/s
9
589
0024DH
Unit Flow Velocity of Point9
Floating Pt.
m/s
10
593
00251H
Unit Flow Velocity of Point10
Floating Pt.
m/s
11
597
00255H
Standard Flow Velocity of Point1
Floating Pt.
m/s
12
601
00259H
Standard Flow Velocity of Point2
Floating Pt.
m/s
13
605
0025DH
Standard Flow Velocity of Point3
Floating Pt.
m/s
14
609
00261H
Standard Flow Velocity of Point4
Floating Pt.
m/s
15
613
00265H
Standard Flow Velocity of Point5
Floating Pt.
m/s
16
617
00269H
Standard Flow Velocity of Point6
Floating Pt.
m/s
17
621
0026DH
Standard Flow Velocity of Point7
Floating Pt.
m/s
18
625
00271H
Standard Flow Velocity of Point8
Floating Pt.
m/s
19
629
00275H
Standard Flow Velocity of Point9
Floating Pt.
m/s
20
633
00279H
Standard Flow Velocity of Point10
Floating Pt.
m/s
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AF1 – Modbus Manual
AF1_Modbus_Protocol_V1.docx
Instruction Manual
© 2016 ROTRONIC AG 9 / 20
4.7 Software engineering
Item
No.
Starting Address
Parameter
Data Bytes
Data Type
Unit
Value
Hi byte
Lo Byte
Information
1
00
30‐3F
Serial Number
16 bytes
ASCII
2
00
40‐49
Firmware version
10 bytes
ASCII
RS‐485 Slave Address, Baud rate, Data format
3
00
4C
Slave Address
1 bytes
unsigned Integer
1‐247
4
00
4E
Baud rate
1 bytes
unsigned Integer
0: 9600
1: 19200
2: 38400
3: 57600
4: 115200
5
00
50
Data type
1 bytes
unsigned Integer
0: N81
1: N82
2: E81
3: E82
4: O81
5: O82
Physical Quantities
6
04
00
Flow Velocity
4 bytes
IEEE 754
m/s 7
04
04
Flow Velocity
4 bytes
IEEE 754
ft/s 8
04
08
Flow Velocity
4 bytes
IEEE 754
km/h 9
04
0C
Flow Velocity
4 bytes
IEEE 754
mph
10
04
10
Flow Velocity
4 bytes
IEEE 754
knot 11
04
14
Temperature
4 bytes
IEEE 754
℃
12
04
18
Temperature
4 bytes
IEEE 754
℉
13
04
20
Flow Velocity
4 bytes
32‐bit Integer
m/s
X10000
14
04
24
Flow Velocity
4 bytes
32‐bit Integer
ft/s
X10000
15
04
28
Flow Velocity
4 bytes
32‐bit Integer
km/h
X10000
16
04
2C
Flow Velocity
4 bytes
32‐bit Integer
mph
X10000
17
04
30
Flow Velocity
4 bytes
32‐bit Integer
knot
X10000
18
04
34
Temperature
4 bytes
32‐bit Integer
℃
X10000
19
04
38
Temperature
4 bytes
32‐bit Integer
℉
X10000
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AF1 – Modbus Manual
AF1_Modbus_Protocol_V1.docx
Instruction Manual
© 2016 ROTRONIC AG 10 / 20
ASCII format, Item No. 1‐2
1st Word
2nd Word
3rd Word
4th Word
5th Word
6th Word
7th Word
8th Word
Hi
byte
Lo
byte
Hi
byte
Lo
byte
Hi
byte
Lo
byte
Hi
byte
Lo
byte
Hi
byte
Lo
byte
Hi
byte
Lo
byte
Hi
byte
Lo
byte
Hi
byte
Lo
byte
“ABCDEF0123456789” is represented as
<41><42><43><44><45><46><30><31><32><33><34><35><36><37><38><39>
IEEE754 format, Item No. 6‐14
Data Hi Word, Hi Byte
Data Hi Word, Lo Byte
Data Lo Word, Hi Byte
Data Lo Word, Lo Byte
SEEE
EEEE
EMMM
MMMM
MMMM
MMMM
MMMM
MMMM
Where
S represents the sign bit where 1 is negative and 0 is positive
E is the two’s complement exponent with an offset of 127 i.e. an exponent of zero is represented by
127, an exponent of 1 by 128 etc.
M is the 23‐bit normal mantissa. The highest bit is always 1 and, therefore, is not stored. Using the
above format the floating point number 23.83 is represented as <41><BE><A3><D7>:
Communication Example
Data Hi Word, Hi Byte
Data Hi Word, Lo Byte
Data Lo Word, Hi Byte
Data Lo Word, Lo Byte
0x41
0xBE
0xA3
0xD7
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AF1 – Modbus Manual
AF1_Modbus_Protocol_V1.docx
Instruction Manual
© 2016 ROTRONIC AG 11 / 20
5 Device specific actions
5.1 Read Flow Velocity [m/s] IEEE 754
Request the host (PC or PLC) to polling the data of FTSXX
Field Name
Value
Type
Byte
Slave Address
1...247
Byte
1
Read Holding registers
03
Byte
1
Starting Address Hi
04
Byte
1
Starting Address Lo
00
Byte
1
No. of registers Hi
00
Byte
1
No. of registers Lo
02
Byte
1
CRC Lo
CRC Lo
Byte
1
CRC Hi
CRC Hi
Byte
1
*Registers of Flow Velocity IEEE 754 are 0x0400 ... 0x0403
Response FTSXX response data to the host (PC or PLC)
Field Name
Value
Type
Byte
Slave Address
1...247
Byte
1
Read Holding registers
03
Byte
1
Byte Count
04
Byte
1
IEEE 754 Data Lo Word, Hi Byte
0x77
Byte
1
IEEE 754 Data Lo Word, Lo Byte
0xCF
Byte
1
IEEE 754 Data Hi Word, Hi Byte
0x42
Byte
1
IEEE 754 Data Hi Word, Lo Byte
0x13
Byte
1
CRC Lo
CRC Lo
Byte
1
CRC Hi
CRC Hi
Byte
1
* the floating point number 36.87 is represented as <42><13><77><CF>:
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AF1 – Modbus Manual
AF1_Modbus_Protocol_V1.docx
Instruction Manual
© 2016 ROTRONIC AG 12 / 20
5.2 Read Flow Velocity [m/s] 32‐bit Integer
Request the host (PC or PLC) to polling the data of FTSXX
Field Name
Value
Type
Byte
Slave Address
1...247
Byte
1
Read Holding registers
03
Byte
1
Starting Address Hi
04
Byte
1
Starting Address Lo
20
Byte
1
No. of registers Hi
00
Byte
1
No. of registers Lo
02
Byte
1
CRC Lo
CRC Lo
Byte
1
CRC Hi
CRC Hi
Byte
1
*Registers of Flow Velocity 32‐bit Integer are 0x0420 ... 0x0423
Response FTSXX response data to the host (PC or PLC)
Field Name
Value
Type
Byte
Slave Address
1...247
Byte
1
Read Holding registers
03
Byte
1
Byte Count
04
Byte
1
Hi Word, Hi Byte
0x11
Byte
1
Hi Word, Lo Byte
0x22
Byte
1
Lo Word, Hi Byte
0x33
Byte
1
Lo Word, Lo Byte
0x44
Byte
1
CRC Lo
CRC Lo
Byte
1
CRC Hi
CRC Hi
Byte
1
* the 32‐bit Integer number 287454020 is represented as
<11><22><33><44> Example Flow velocity is 28745.4020 [m/s]
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AF1 – Modbus Manual
AF1_Modbus_Protocol_V1.docx
Instruction Manual
© 2016 ROTRONIC AG 13 / 20
5.3 Read Serial No.
Request the host (PC or PLC) to polling the data of FTSXX
Field Name
Value
Type
Byte
Slave Address
1...247
Byte
1
Read Holding registers
03
Byte
1
Starting Address Hi
00
Byte
1
Starting Address Lo
30
Byte
1
No. of registers Hi
00
Byte
1
No. of registers Lo
08
Byte
1
CRC Lo
CRC Lo
Byte
1
CRC Hi
CRC Hi
Byte
1
*Registers of Serial No. are 0x30 ... 0x3F
Response FTSXX response data to the host (PC or PLC)
Field Name
Value
Type
Byte
Slave Address
1...247
Byte
1
Read Holding registers
03
Byte
1
Byte Count
10
Byte
1
1st Word, Lo byte
0x4E
Byte
1
1st Word, Hi byte
0x53
Byte
1
2nd Word, Lo byte
0x31
Byte
1
2nd Word, Hi byte
0x30
Byte
1
3rd Word, Lo byte
0x33
Byte
1
3rd Word, Hi byte
0x32
Byte
1
4th Word, Lo byte
0x35
Byte
1
4th Word, Hi byte
0x34
Byte
1
5th Word, Lo byte
0x37
Byte
1
5th Word, Hi byte
0x36
Byte
1
6th Word, Lo byte
0x39
Byte
1
6th Word, Hi byte
0x38
Byte
1
7th Word, Lo byte
0x42
Byte
1
7th Word, Hi byte
0x41
Byte
1
8th Word, Lo byte
0x44
Byte
1
8th Word, Hi byte
0x43
Byte
1
CRC Lo
CRC Lo
Byte
1
CRC Hi
CRC Hi
Byte
1
*example of Serial No. is “SN0123456789ABCD”
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AF1 – Modbus Manual
AF1_Modbus_Protocol_V1.docx
Instruction Manual
© 2016 ROTRONIC AG 14 / 20
5.4 Read Firmware Version
Request the host (PC or PLC) to polling the data of FTSXX
Field Name
Value
Type
Byte
Slave Address
1...247
Byte
1
Read Holding registers
03
Byte
1
Starting Address Hi
00
Byte
1
Starting Address Lo
40
Byte
1
No. of registers Hi
00
Byte
1
No. of registers Lo
05
Byte
1
CRC Lo
CRC Lo
Byte
1
CRC Hi
CRC Hi
Byte
1
*Registers of Firmware Version are 0x40 ... 0x49
Response FTSXX response data to the host (PC or PLC)
Field Name
Value
Type
Byte
Slave Address
1...247
Byte
1
Read Holding registers
03
Byte
1
Byte Count
0A
Byte
1
1st Word, Lo byte
0x31
Byte
1
1st Word, Hi byte
0x56
Byte
1
2nd Word, Lo byte
0x33
Byte
1
2nd Word, Hi byte
0x32
Byte
1
3rd Word, Lo byte
0x2E
Byte
1
3rd Word, Hi byte
0x34
Byte
1
4th Word, Lo byte
0x36
Byte
1
4th Word, Hi byte
0x35
Byte
1
5th Word, Lo byte
0x38
Byte
1
5th Word, Hi byte
0x37
Byte
1
CRC Lo
CRC Lo
Byte
1
CRC Hi
CRC Hi
Byte
1
*example of Firmware Version is “V1234.5678”
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AF1 – Modbus Manual
AF1_Modbus_Protocol_V1.docx
Instruction Manual
© 2016 ROTRONIC AG 15 / 20
5.5 Disable Protection of Read Only Registers
Request the host (PC or PLC) send command to FTSXX
Field Name
Value
Type
Byte
Slave Address
1...247
Byte
1
Write Holding registers
10
Byte
1
Starting Address Hi
03
Byte
1
Starting Address Lo
00
Byte
1
No. of registers Hi
00
Byte
1
No. of registers Lo
02
Byte
1
No. of registers byte count
04
Byte
1
Registers Value – High Byte of Command
03
Byte
1
Registers Value – Low Byte of Command
01
Byte
1
Registers Value – High Byte of Argument
0E
Byte
1
Registers Value – Low Byte of Argument
5F
Byte
1
CRC Lo
CRC Lo
Byte
1
CRC Hi
CRC Hi
Byte
1
*Factory Command Register at Network Address 0x0300
*Calibration related registers resume writable after FTS accept this command
Response FTSXX response data to the host (PC or PLC)
Field Name
Value
Type
Byte
Slave Address
1...247
Byte
1
Write Holding registers
10
Byte
1
Starting Address Hi
03
Byte
1
Starting Address Lo
00
Byte
1
No. of registers Hi
00
Byte
1
No. of registers Lo
02
Byte
1
CRC Lo
CRC Lo
Byte
1
CRC Hi
CRC Hi
Byte
1
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AF1 – Modbus Manual
AF1_Modbus_Protocol_V1.docx
Instruction Manual
© 2016 ROTRONIC AG 16 / 20
5.6 Clean Interpolation Points
Request the host (PC or PLC) send command to FTSXX
Field Name
Value
Type
Byte
Slave Address
1...247
Byte
1
Write Holding registers
10
Byte
1
Starting Address Hi
03
Byte
1
Starting Address Lo
00
Byte
1
No. of registers Hi
00
Byte
1
No. of registers Lo
02
Byte
1
No. of registers byte count
04
Byte
1
Registers Value – High Byte of Command
09
Byte
1
Registers Value – Low Byte of Command
01
Byte
1
Registers Value – High Byte of Argument
FF
Byte
1
Registers Value – Low Byte of Argument
FF
Byte
1
CRC Lo
CRC Lo
Byte
1
CRC Hi
CRC Hi
Byte
1
*example of Factory Command 0x0901 – Reset Interpolation Table
Response FTSXX response data to the host (PC or PLC)
Field Name
Value
Type
Byte
Slave Address
1...247
Byte
1
Write Holding registers
10
Byte
1
Starting Address Hi
03
Byte
1
Starting Address Lo
00
Byte
1
No. of registers Hi
00
Byte
1
No. of registers Lo
02
Byte
1
CRC Lo
CRC Lo
Byte
1
CRC Hi
CRC Hi
Byte
1
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AF1 – Modbus Manual
AF1_Modbus_Protocol_V1.docx
Instruction Manual
© 2016 ROTRONIC AG 17 / 20
5.7 Add Interpolation Points
Request the host (PC or PLC) send command to FTSXX
Field Name
Value
Type
Byte
Slave Address
1...247
Byte
1
Write Holding registers
10
Byte
1
Starting Address Hi
03
Byte
1
Starting Address Lo
00
Byte
1
No. of registers Hi
00
Byte
1
No. of registers Lo
02
Byte
1
No. of registers byte count
04
Byte
1
Registers Value – High Byte of Command
09
Byte
1
Registers Value – Low Byte of Command
02
Byte
1
Registers Value – High Byte of Argument
00
Byte
1
Registers Value – Low Byte of Argument
7B
Byte
1
CRC Lo
CRC Lo
Byte
1
CRC Hi
CRC Hi
Byte
1
*Example of Factory Command 0x0902 – Add Interpolation Point when standard velocity 1.23m/s
*Example of velocity 1.23 m/s and consider a number of 123 because scale x100
*Integer number 123 would be 0x007B in Hexadecimal Representation
Response FTSXX response data to the host (PC or PLC)
Field Name
Value
Type
Byte
Slave Address
1...247
Byte
1
Write Holding registers
10
Byte
1
Starting Address Hi
03
Byte
1
Starting Address Lo
00
Byte
1
No. of registers Hi
00
Byte
1
No. of registers Lo
02
Byte
1
CRC Lo
CRC Lo
Byte
1
CRC Hi
CRC Hi
Byte
1
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AF1 – Modbus Manual
AF1_Modbus_Protocol_V1.docx
Instruction Manual
© 2016 ROTRONIC AG 18 / 20
5.8 Set Velocity Offset
Request the host (PC or PLC) send command to FTSXX
Field Name
Value
Type
Byte
Slave Address
1...247
Byte
1
Write Holding registers
10
Byte
1
Starting Address Hi
01
Byte
1
Starting Address Lo
BE
Byte
1
No. of registers Hi
00
Byte
1
No. of registers Lo
02
Byte
1
No. of registers byte count
04
Byte
1
Registers Value – High Byte of Command
70
Byte
1
Registers Value – Low Byte of Command
A4
Byte
1
Registers Value – High Byte of Argument
3F
Byte
1
Registers Value – Low Byte of Argument
9D
Byte
1
CRC Lo
CRC Lo
Byte
1
CRC Hi
CRC Hi
Byte
1
*Unit in m/s, the velocity reading will plus offset amount. E.g. V
DISP
= V
RAW
+ V
offset
*Example of offset 1.23 m/s and floating number 1.23 would be 0x3f9d70a4 in Hexadecimal
Representation
Response FTSXX response data to the host (PC or PLC)
Field Name
Value
Type
Byte
Slave Address
1…247
Byte
1
Write Holding registers
10
Byte
1
Starting Address Hi
01
Byte
1
Starting Address Lo
BE
Byte
1
No. of registers Hi
00
Byte
1
No. of registers Lo
02
Byte
1
CRC Lo
CRC Lo
Byte
1
CRC Hi
CRC Hi
Byte
1
*FTS may reply error code 0x90 and exception code 0x02 if register under read only protection
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AF1 – Modbus Manual
AF1_Modbus_Protocol_V1.docx
Instruction Manual
© 2016 ROTRONIC AG 19 / 20
5.9 Set Temperature Offset
Request the host (PC or PLC) send command to FTSXX
Field Name
Value
Type
Byte
Slave Address
1...247
Byte
1
Write Holding registers
10
Byte
1
Starting Address Hi
01
Byte
1
Starting Address Lo
C2
Byte
1
No. of registers Hi
00
Byte
1
No. of registers Lo
02
Byte
1
No. of registers byte count
04
Byte
1
Registers Value – High Byte of Command
70
Byte
1
Registers Value – Low Byte of Command
A4
Byte
1
Registers Value – High Byte of Argument
BF
Byte
1
Registers Value – Low Byte of Argument
9D
Byte
1
CRC Lo
CRC Lo
Byte
1
CRC Hi
CRC Hi
Byte
1
*Unit in ˚C, the temperature reading will plus offset amount. E.g. T
DISP
= T
RAW
+ T
offset
*Example of offset ‐1.23 m/s and floating number ‐1.23 would be 0xbf9d70a4 in Hexadecimal
Representation
Response FTSXX response data to the host (PC or PLC)
Field Name
Value
Type
Byte
Slave Address
1...247
Byte
1
Write Holding registers
10
Byte
1
Starting Address Hi
01
Byte
1
Starting Address Lo
C2
Byte
1
No. of registers Hi
00
Byte
1
No. of registers Lo
02
Byte
1
CRC Lo
CRC Lo
Byte
1
CRC Hi
CRC Hi
Byte
1
*FTS may reply error code 0x90 and exception code 0x02 if register under read only protection
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AF1 – Modbus Manual
AF1_Modbus_Protocol_V1.docx
Instruction Manual
© 2016 ROTRONIC AG 20 / 20
6 Document Version
Doc. Release
Date
Comment
AF1_Modbus_Protocol_V1.docx
January 2017
Release Document
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