Fuji Electric frenic 5000g11s User manual

Instruction Manual
5000G11S/P11S
Standard RS485 Interface
Caution
After reading and understanding this
instruction manual, install, connect
(wire), operate and maintain the
inverter.
Please consider to ensure that this
instruction manual reaches the
persons who actually use this
product.
Keep this instruction manual up to
disposing the inverter.
The product is subject to change for
improvement etc. without notice.
Fuji Electric Co., Ltd. INR-HF51190a-E
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1
Edition history
Edition
Date of issue
Content
– Mar. 1999 First edition

2
Foreword
This instruction manual describes the communication specification when the inverter FRENIC5000G11S/P11S
series is controlled through serial transmission from a host unit such as personal computer or PLC. Read this
instruction manual and the instruction manual of the inverter, understand the treatment method before use, and
use this unit correctly. Misuse may result in abnormal operation or cause troubles and reduction of life.
Be sure to read carefully this instruction manual before installation, connection (wiring), operation, maintenance
and inspection, and use correctly.
Use this unit after mastered all of the knowledge of the unit, information of safety and attentions.
In this instruction manual, the ranks of safety messages are classified as follows:
Warning Denotes operating procedures and practices that may result in personal injury or loss of
life if not correctly followed.
Caution Denotes operating procedures and practices that, if not strictly observed, may result in
damage to, or destruction of the equipment.
Even if the items in the caution, they may cause serious results under the circumstances. Since the items have
important contents, be sure to follow to the cautions.
Wiring
Warning
- Be sure to wire after power supply off.
There is a fear of electric shock.
Caution
- This cannot connect with RS422A interface. (Since this can do only one way communication, the response
cannot be received.)
There is a fear of damage.
Operation
Warning
- Be sure to check no run command because of sudden start when valid/invalid communication is changed over,
while a run command through RS485 or external signal terminals is remained.
There is a fear of failure.
- Be sure to check no run command because of sudden restart when the alarm is reset while a run command
through RS485 is remained.
There is a fear of failure.
- There is possibility that stop command through RS485 cannot be recognized when a communication error
causes while operating through RS485. Be sure that a emergency stop is made possible by using forced stop
of the external signal terminal (BX).
There is a fear of failure.
Microsoft, MS-DOS and Windows are the registered trade marks of Microsoft Corporation in
USA and other countries.
The other company names and product names in this instruction manual are the trade
makes or registered trade makes of each company.
Caution for safety instructions
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3
－Contents－
1 Outline ................................................................................................................................................................. 4
1-1 Features.................................................................................................................................................... 4
1-2 Function overview ..................................................................................................................................... 4
2 Transmission specification................................................................................................................................... 4
3 Connection .......................................................................................................................................................... 5
3-1 Connection method ................................................................................................................................... 5
3-2 RS485 ....................................................................................................................................................... 5
3-3 Example of connection.............................................................................................................................. 6
3-4 Example of noise prevention ..................................................................................................................... 6
4 Transmission method .......................................................................................................................................... 7
4-1 Transmission frame................................................................................................................................... 7
4-1-1 Standard frame ............................................................................................................................... 8
4-1-2 Option frame ................................................................................................................................. 11
4-1-3 Negative response frame.............................................................................................................. 13
4-2 Field description ...................................................................................................................................... 14
4-2-1Data field........................................................................................................................................ 14
4-2-2 Check sum field ............................................................................................................................ 14
4-3 Procedure on the host side ..................................................................................................................... 15
4-3-1Polling procedure........................................................................................................................... 15
4-3-2 Selecting procedure...................................................................................................................... 16
4-4 Example of communication ..................................................................................................................... 17
4-4-1 Standard frame ............................................................................................................................. 17
4-4-2 Option frame ................................................................................................................................. 17
4-5 Communication error............................................................................................................................... 18
4-5-1 Communication error code............................................................................................................ 18
4-5-2 Action at communication error ...................................................................................................... 18
5 Functions specific for communication................................................................................................................ 22
5-1 Command data........................................................................................................................................ 22
5-2 Operation command data........................................................................................................................ 22
5-3 Function data .......................................................................................................................................... 23
5-4 Monitoring data ....................................................................................................................................... 24
6 Function data format.......................................................................................................................................... 25
6-1 List of function data format...................................................................................................................... 25
6-2 Data format specification......................................................................................................................... 28
7 Changeover of communications ........................................................................................................................ 33
7-1 Changeover method for communication valid/invalid .............................................................................. 33
7-2 Link function (operation selection)........................................................................................................... 34
7-3 Coexistence of link (option) and RS485 communication ......................................................................... 34
8 Response time................................................................................................................................................... 35
8-1 Response interval time............................................................................................................................ 35
8-2 Time of receiving preparation completion................................................................................................ 35
9 Function............................................................................................................................................................. 36
10 Troubleshooting ............................................................................................................................................... 37
11 Appendix.......................................................................................................................................................... 38
11-1 Communication level converter ............................................................................................................. 38
11-2 ASCII code list....................................................................................................................................... 38
11-3 Example of a control program ............................................................................................................... 39

4
1 Outline
1-1 Features
- A host unit can be connected up to 31 inverters.
- Because a common protocol for FRENIC5000G11S/P11S series is adopted, the similar program in host
unit can operate all inverter of the series. (The parameter specifications may differ for each unit type.)
- Because adopting the transmission frame of fixed length, the program on the host is facilitated.
- The optional transmission frame can shorten the communication time for the operation commands and
setting frequency required high response.
1-2 Function overview
Function Remarks
Operation
command
- Forward command (FWD) and Reverse command (REV)
- Digital input command (X1 – X9)
- Reset command (RST)
Frequency
setting
Can select 2 methods.
- ±20000/maximum frequency
- Frequency (min. unit: 0.01Hz)･････････････Without polarity
By specific communication
functions (S code)
Operating
condition
monitor
- Setting frequency
- Output frequency, torque calculation value, torque current, input
power, output current and output voltage
- Operation state and Y1 – Y5 condition
Maintenance
data monitor
- Operation time and DC link circuit voltage
- Life (main circuit capacitor, capacitors on control PCB and cooling fan)
- Type code, capacity code and ROM version
Alarm data
monitor
- Alarm history (newest – former 3 times) monitor
- Information monitor at occurring new alarm.
Operation information
(Output frequency, setting frequency, torque
calculation value, torque current, input power, output current and output
voltage)
Operation state and universal output terminals
Maintenance
(integrated operation time, DC link circuit voltage,
internal air temperature in inverter and fin temperature)
By specific communication
functions
(M code)
Function data - All function data can be monitored and changed.
(However, the functions related to RS485 communication cannot be changed.)
By standard functions
2 Transmission specification
Item Specification
Physical level EIA RS485 (A unit with an RS232C interface reqires a converter)
Transmission distance 500 m max.
Recommended cable 24AWG shielded twisted-pair cable
Number of connectable units
Host: 1, Inverter: 31 (station address: 01– 31, broadcast: 99)
Transmission speed 19200, 9600, 4800, 2400, 1200 [bits/s]
Synchronization method Start - stop synchronization
Transmission mode Half duplex
Transmission protocol Polling/selecting, broadcast
Character code 7-bit ASCII
Data length 8 bits, 7 bits selectable
Stop bit length 1 bit，2 bits selectable
Frame length Standard frame: 16 bytes fixed, Option frame: 8 bytes, 12 bytes
Parity Non, even parity, odd parity selectable
Error check BCC (check sum), overrun error, frame error

5
3 Connection
3-1 Connection method
Use shielded wires (Recommended cable: Refer to 2. Transmission specification) and connect the wires
between the control terminals (DX+, DX- and SD) of the inverter and the host unit so as to surely become
drawing in one stroke.
Warning
Be sure to wire after power supply off.
There is a fear of electric shock.
Caution
This cannot connect with RS422A interface. (Because this can do only one way
communication, the response cannot be received.)
There is a fear of damage.
Note:
1) Shorten the wiring as possible to be hard against noise influence.
2) Connection with RS232C units uses a communication level converter on the market.
(Refer to "11-1 Communication level converter").
3) Assign the different station address to the inverters.
Control terminals (only for communication)
Terminal
marking Terminal name Function description
DX+ RS485 communication data (+)
DX- RS485 communication data (–)
Input/output terminals for RS485 communication. Max. 31
inverters can be connected by multi-drop connection.
SD For connection to
communication cable sheath
Connecting shielded wire of cable. Electrically floating
Control terminal arrangement ･･････････
In detail, refer to "Connection" of the instruction manual of inverter.
DX- DX+ SD
3-2 RS485
RS485 interface is used when performing multi-drop bidirectional communication. The input/output terminals are
provided for 2-wire and 4-wire connections. Either unit of the connections can be used (using as 2-wire
connection).
Type Description Example of terminals
2-wire
connection
Input and output (driver and receiver) are
internally connected.
TRD+ ･････ Differential input terminal (hot side)
TRD- ･･････ Differential output terminal (common side)
FG ････････ Frame ground
4-wire
connection
Input and output (driver and receiver) are
separated.
IN+, IN- ･･････････ Differential input terminal
OUT+, OUT- ･････ Differential output terminal
SD ･･･････････････ Signal ground
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6
3-3 Example of connection
3-4 Example of noise prevention
The malfunction such as communication error may be occured by the noise generated the inverter. In such case,
connect ferrite core or capacitor.
FRENIC5000-G11S
Inverter 2
DX+
DX-
SD
Address 02
FRENIC5000-P11S
Inverter n
DX+
DX-
SD
Address n
Host unit
RS232C
TXD RXD
Host unit
RS485
SD OUT- OUT+ IN- IN+
RS232C/RS485 converter
Product on the market
TRD+
TRD-
FG
Terminating
resistor
(100Ω
ΩΩ
Ω)
Terminating
resistor
(100Ω
ΩΩ
Ω)
(
4-wire
)
Shield
(
2-wire t
yp
e
)
FRENIC5000-G11S
Inverter 1
DX+
DX-
SD
Address 01
Using integrated
terminating resistor
(100Ω)
31 Inverters
max.
Host unit
TRD+
TRD-
FG
Pass through or wind
2-3 turns so as in the
same phase Inverter
DX+
DX-
SD
G
Ferrite core
Capacitor
0.01
µ
F 1000V

7
4 Transmission method
The polling/selecting system is applied to the response message feature. The inverter is always waiting the
selecting (writing request) and polling (reading request) from the host unit.
When the inverter receives a request frame from the host during waiting state and judges for it to be a correct
receiving, the inverter processes for the request and returns an affirm response frame (in a case of polling,
returning the data together with the affirm response frame). If judging it not to be normally received, the inverter
returns a negative response frame. Further, in a case of broadcast (selecting all terminals in a lump), the inverter
does not return the response.
Polling
Request frame
Host Reading request
Inverter Response + Data
Response frame
Selecting
Request frame
Host
Writing request + Data
Inverter Response
Response frame
Broadcast
Request frame
Host
Writing request + Data
Inverter
Description）
））
）Broadcast
(selecting one lump of all terminals)
A frame set with station address of 99 is treated by all inverters as broad cast. By using broadcast,
operation commands and frequency command can be give all the inverters in a lump. (The writing of S01 –
S06 ['W', 'E' commands] in the standard frame and 'a' – 'f' and 'm' commands in the option frame are only
valid.)
4-1 Transmission frame
In the transmission frames, there are standard frames that can use all communication functions and option
frames that are limited to the command and monitoring to inverter but can perform high-speed communication.
In both standard frame and option frame, all characters (including BCC) configuring the frame is expressed with
ASCII code.
The lengths of transmission frames become shown in the following table.
Sort of frame Frame length
Request 16 bytesSelecting
Response 16 bytes
Request 16 bytes
Standard frame
Polling
Response 16 bytes
Request 12 bytesSelecting
Response 8 bytes
Request 8 bytes
Option frame
Polling
Response 12 bytes

8
4-1-1 Standard frame
Request frame [Host ⇒Inverter]
Value
Byte Field ASCII type Hexadecimal Description
0 SOH SOH 01HStart of header
1 Station address ’0’–’3’, ’9’ 30
H
–33
H,
39
H
Station address of inverter (Decimal: ×10)
2 ’0’–’9’ 30H–39HStation address of inverter (Decimal: ×1)
3 ENQ ENQ 05HTransmission request
4 Command
‘R’
‘W’
‘A’
‘E’
52H
57H
41H
45H
Request command
Polling (reading)
Selecting (writing)
High-response selecting (writing)*1
Alarm reset
5 Type
‘F’
’E’
‘C’
‘P’
‘H’
‘A’
‘o’
‘S’
‘M’
46H
45H
43H
50H
48H
41H
6FH
53H
4DH
Function type
Fundamental Functions
Extension Terminal Functions
Control Functions of Frequency
Motor Parameters
High performance Functions
Alternative Motor Parameters
Optional Functions
Setting data Functions
Monitoring data Functions
6 Function code ’0’–’4’ 30H–34HFunction code (Decimal: ×10)
7 ’0–’9’ 30H–39HFunction code (Decimal: ×1)
8 SP ‘’ 20HNot use (fixed space)
9 Data ’0’–’F’ 30H–3FH1st character of data (Hexadecimal: ×1000H)
10 ’0’–’F’ 30H–3FH2nd character of data (Hexadecimal: ×100H)
11 ’0’–’F’ 30H–3FH3rd character of data (Hexadecimal: ×10H)
12 ’0’–’F’ 30H–3FH4th character of data (Hexadecimal: ×1H)
13 ETX ETX 03HEnd of text
14 BCC ’0’–’F’ 30H–3FHCheck sum 1 (Hexadecimal: ×10H)
15 ’0’–’F’ 30H–3FHCheck sum 2 (Hexadecimal: ×1H)
*1) This is used to read out the monitor during writing a function taking for long time (several seconds) (see time
out list of "4.3 Procedure on host side"). The response of the inverter is not returned till finish of writing of the
inverter by the normal writing command 'W', but, since the inverter immediately returns at the time point of
receiving the writing request under the high speed response command 'A', the communication can continue even
during writing. To judge the finish of writing, call BUSY flag during writing (M14: 15th bit). If trying to newly write
during writing, NAK response (error during writing) is issued.
SOH
Station address
ENQ
C
om-
mand
Type
Function code
SP Data ETX BCC
0 1 2 3 4 5 6 7 8 9 12 13 14 15
1 2 1 1 1 2 1 4 1 2 (byte)
Area included to BCC

9
ACK response frame [Inverter ⇒Host]
Value
Byte Field ASCII type Hexadecimal Description
0 SOH SOH 01HStart of header
1 Station address ’0’–3’, ’9’ 30
H
–33
H
, 39
H
Station address of inverter (Decimal: ×10)
2 ’0’–’9’ 30H–39HStation address of inverter (Decimal: ×1)
3 ACK
ACK 06H
Transmission request
Acknowledge: When there are no receiving error and
logical error of the request
4 Command
‘R’
‘W’
‘A’
‘E’
52H
57H
41H
45H
Answer back to request command
Polling (reading)
Selecting (writing)
High-response selecting (writing)
Alarm reset
5 Type
‘F’
’E’
‘C’
‘P’
‘H’
‘A’
‘o’
‘S’
‘M’
46H
45H
43H
50H
48H
41H
6FH
53H
4DH
Function type
Fundamental Functions
Extension Terminal Functions
Control Functions of Frequency
Motor Parameters
High performance Functions
Alternative Motor Parameters
Optional Functions
Setting data Functions
Monitoring data Functions
6 Function code ’0–’4’ 30H–34HFunction code (Decimal: ×10)
7 ’0’–’9’ 30H–39HFunction code (Decimal: ×1)
8 Polarity
‘ ’
‘-’
20H
2DH
Polarities of M09 and M35 data
Positive data, normal data (except M09 and M35)
negative data
9 Data ’0’–’F’ 30H–3FH1st character of data (Hexadecimal: ×1000H)
10 ’0’–’F’ 30H–3FH2nd character of data (Hexadecimal: ×100H)
11 ’0’–’F’ 30H–3FH3rd character of data (Hexadecimal: ×10H)
12 ’0’–’F’ 30H–3FH4th character of data (Hexadecimal: ×1H)
13 ETX ETX 03HEnd of text
14 BCC ’0’–’F’ 30H–3FHCheck sum 1 (Hexadecimal: ×10H)
15 ’0’–’F’ 30H–3FHCheck sum 2 (Hexadecimal: ×1H)
SOH
Station address
ACK
Com-m
and
Type
Function code
Polarity
Data ETX BCC
0 1 2 3 4 5 6 7 8 9 12 13 14 15
1 2 1 1 1 2 1 4 1 2 (byte)
Area included to BCC

10
NAK response frame [Inverter ⇒Host]
Value
Byte Field ASCII type Hexadecimal Description
0 SOH SOH 01HStart of header
1 Station address ’0’–’3’, ’9’ 30
H
–33
H
, 39
H
Station address of inverter (Decimal: ×10)
2 ’0’–’9’ 30H–39HStation address of inverter (Decimal: ×1)
3 NAK
NAK 15H
Transmission response
Negative acknowledge: When there is a logical error
in the request
4 Command *1
‘R’
‘W’
‘A’
‘E’
52H
57H
41H
45H
Answer back to request command
Polling (reading)
Selecting (writing)
High-response selecting (writing)
Alarm reset
5 Type *1
‘F’
’E’
‘C’
‘P’
‘H’
‘A’
‘o’
‘S’
‘M’
46H
45H
43H
50H
48H
41H
6FH
53H
4DH
Function type
Fundamental Functions
Extension Terminal Functions
Control Functions of Frequency
Motor Parameters
High performance Functions
Alternative Motor Parameters
Optional Functions
Command data Functions
Monitoring data Functions
6 Function code *1 ’0’–’4’ 30H–34HFunction code (Decimal: ×10)
7 ’0’–’9’ 30H–39HFunction code (Decimal: ×1)
8 SP ‘ ’ 20HNot use (fixed space)
9 Data ‘ ’ 20HNot use (fixed space)
10 ‘ ’ 20HNot use (fixed space)
11 ’4’, ’5’ 34H, 35HCommunication error code (Hexadecimal: ×10H)
12 ’0’–’F’ 30H–3FHCommunication error code (Hexadecimal: ×1H)
13 ETX ETX 03HEnd of text
14 BCC ’0’–’F’ 30H–3FHCheck sum 1 (Hexadecimal: ×10H)
15 ’0’–’F’ 30H–3FHCheck sum 2 (Hexadecimal: ×1H)
*1) In case of the transmission format error and transmission command error, spaces (' ‘= 20H) are set.
SOH
Station address
NAK
Com-m
and
Type
Function code
SP Data ETX BCC
0 1 2 3 4 5 6 7 8 9 12 13 14 15
1 2 1 1 1 2 1 4 1 2 (byte)
Area included to BCC

11
4-1-2 Option frame
Selecting request frame [Host ⇒Inverter]
Value
Byte Field ASCII type Hexadecimal Description
0 SOH SOH 01HStart of header
1 Station address ’0’–’3’,’9’ 30
H
–33
H
, 39
H
Station address of inverter (Decimal: ×10)
2 ’0’–’9’ 30H–39HStation address of inverter (Decimal: ×1)
3 ENQ ENQ 05HTransmission request
4 Command
‘a’
‘e’
‘f’
‘m’
61H
65H
66H
6DH
Request command
Frequency setting (p.u.)
Frequency setting
Operation command
Alarm reset
5 Data ’0’–’F’ 30H–3FH1st character of data (Hexadecimal: ×1000H)
6 ’0’–’F’ 30H–3FH2nd character of data (Hexadecimal: ×100H)
7 ’0’–’F’ 30H–3FH3rd character of data (Hexadecimal: ×10H)
8 ’0’–’F’ 30H–3FH4th character of data (Hexadecimal: ×1H)
9 ETX ETX 03HEnd of text
10 BCC ’0’–’F’ 30H–3FHCheck sum 1 (Hexadecimal: ×10H)
11 ’0’–’F’ 30H–3FHCheck sum 2 (Hexadecimal: ×1H)
Selecting response frame [Inverter ⇒Host]
Value
Byte Field
ASCII type Hexadecimal Description
0 SOH SOH 01HStart of header
1 Station address ’0’–’3’, ’9’ 30
H
–33
H
, 39
H
Station address of inverter (Decimal: ×10)
2 ’0’–’9’ 30H–39HStation address of inverter (Decimal: ×1)
3 ACK/NAK
ACK
NAK
06H
15H
Transmission response
Acknowledge: When there are no receiving error
and logical error
Negative Acknowledge:
When there is a logical error in
the request
4 command
‘a’
‘e’
‘f’
‘m’
61H
65H
66H
6DH
Request command
Frequency setting (p.u.)
Frequency setting
Operation command
Alarm reset
5 ETX ETX 03HEnd of text
6 BCC ’0’–’F’ 30H–3FHCheck sum 1 (Hexadecimal: ×10H)
7 ’0’–’F’ 30H–3FHCheck sum 2 (Hexadecimal: ×1H)
0 1 2 3 4 5 8 9 10 11
1 2 1 1 4 1 2 (byte)
SOH
Station address
ENQ
Com-m
and
Data ETX BCC
Area included to BCC
SOH
Station addres
ACK/NAK
Com-m
and
ETX BCC
0 1 2 3 4 5 6 7
1 2 1 1 1 2 (byte)
Area included to BCC

12
Polling request frame [Host ⇒Inverter]
Value
Byte Field ASCII type Hexadecimal Description
0 SOH SOH 01HStart of header
1 Station address ’0’–’3’, ’9’ 30
H
–
33
H
, 39
H
Station address of inverter (Decimal: ×10)
2 ’0’–’9’ 30H–39HStation address of inverter (Decimal: ×1)
3 ENQ ENQ 05HTransmission request
4 Command
‘g’
‘h’
‘i’
‘j’
‘k’
67H
68H
69H
6AH
6BH
Request command
Output frequency (p.u.)
Torque
Torque current
Output frequency
Operation state monitor
5 ETX ETX 03HEnd of text
6 BCC ’0’–’F’ 30H–3FHCheck sum 1 (Hexadecimal: ×10H)
7 ’0’–’F’ 30H–3FHCheck sum 2 (Hexadecimal: ×1H)
Polling response frame [Inverter ⇒Host]
Value
Byte Field ASCII type Hexadecimal Description
0 SOH SOH 01HStart of header
1 Station address ’0’–’3’, ’9’ 30
H
–33
H
, 39
H
Station address of inverter (Decimal: ×10)
2 ’0’–’9’ 30H–39HStation address of inverter (Decimal: ×1)
3 ACK/NAK
ACK
NAK
06H
15H
Transmission response
Acknowledge: When there are no receiving error
and logical error
Negative Acknowledge:
When there is a logical error in
the request
4 Command
‘g’
‘h’
‘i’
‘j’
‘k’
67H
68H
69H
6AH
6BH
Request command
Output frequency (p.u.)
Torque
Torque current
Output frequency
Operation state monitor
5 Data ’0’–’F’ 30H–3FH1st character of data (Hexadecimal: ×1000H)
6 ’0’–’F’ 30H–3FH2nd character of data (Hexadecimal: ×100H)
7 ’0’–’F’ 30H–3FH3rd character of data (Hexadecimal: ×10H)
8 ’0’–’F’ 30H–3FH4th character of data (Hexadecimal: ×1H)
9 ETX ETX 03HEnd of text
10 BCC ’0’–’F’ 30H–3FHCheck sum 1 (Hexadecimal: ×10H)
11 ’0’–’F’ 30H–3FHCheck sum 2 (Hexadecimal: ×1H)
SOH
Station address
ACK/NAK
Com-m
and
Data ETX BCC
0 1 2 3 4 5 8 9 10 11
1 2 1 1 4 1 2 (byte)
Area included to BCC
SOH
Station address
ENQ
Com-m
and
ETX BCC
0 1 2 3 4 5 6 7
1 2 1 1 1 2 (byte)
Area included to BCC

13
4-1-3 Negative response frame
As for a response frame changing its length depending on the command sort, it is made basic to respond with
the frame length specified by the command if the command sort character is normally recognized.
No.
Frame/command sort
Cause of the error
Negative response frame
Error code（
（（
（M26）
））
）
1 Standard frame
Option frame
Could not detect ENQ at the
specified position.
Standard frame
(16 bytes length)
Format error
[74]
2 Other than specified
commands
Detected other than specified
commands (R，W，A，E，a – k，m).
Standard frame
(16 bytes length)
Command error
[75]
3 Selecting command
(a – f，m)
Could not detect ETX at the
specified position.
Option frame
(8 bytes length)
Format error
[74]
4 Polling command
（g – k）
Could not detect ETX at the
specified position.
Option frame
(12 bytes length)
Format error
[74]
Note:
When returning the negative response of format error or command error in the standard frame as in No. 1
and 2, the contents of the command sort, function sort and function number field become indefinite.

14
4-2 Field description
4-2-1 Data field
Standard frame
Option frame
All data except partial special data are treated with 16 bits length. In the data field of communication frame, data
use hexadecimal notation (0000H– FFFFH) and each figure is expressed with ASCII code. Further, in case of
negative integer data (data with sign), minus data are produced by taking the two's complement.
In the standard frame, 1 byte of a special adding data is provided in addition to 4 bytes of the data field, and
minus ('–') is set only when communicating negative data exceeding 16 bits length (output frequency of M09 and
M35 in reverse rotation).
Note:
- Make all A – F of hexadecimal capital letters.
- When polling, send with setting zero ('0') in all data field of the request frame.
- When selecting, the data field of the ACK response field becomes indefinite.
Example) When setting 108.5 Hz in the function S01 (frequency command) (maximum frequency: 120 Hz).
1) Calculate setting value according to the data format of S01 (20,000/max. frequency)
Data = 108.5Hz×±20,000/120Hz (＋in forward rotation, – in reverse rotation）
= ±18083.3
≅±18083
2）Convert the data to hexadecimal (If the data is negative, take the two's complement).
Data = 18083 ･････････････････(in forward rotation)
= 46A3H
Data = -18083 ････････････････(in reverse rotation)
= 0-18083 ＝65536-18083 ＝47453
= B95DH
3）Set data.
Position Setting value
(Forward)
Setting value
(Reverse)
1st character of data ASCII '4' ASCII 'B'
2nd character of data ASCII '6' ASCII '9'
3rd character of data ASCII 'A' ASCII '5'
4th character of data ASCII '3' ASCII 'D'
4-2-2 Check sum field
These data are to check for error in the communication frame when transmitting data. The calculation method is
to express the data in ASCII code, which data are the lowest 1 byte of the sum of every 1 byte in the data field
except SOH and check sum.
Example) When the added result is 0123H
Position Setting value
Check sum 1 ASCII '2'
Check sum 2 ASCII '3'
Special added data
8 9 10 11 12
1st character 2nd character 3rd character 4th character
5 6 7 8
1st character 2nd character 3rdt character 4th character

15
4-3 Procedure on the host side
As for the communication procedure of frames, follow the flow chart of each procedure.
Be sure to send next frame after recognizing the response in both writing and reading. If response from the
inverter does not return exceeding a definite time, judge as time-out and execute retry. (When stating retry before
time-out, the request frame cannot be normally received.)
Time-out
Command Treatment Time-out Remarks
R Reading all 0.1 s
Writing function data (S08 –S11) 1 s
10 s Data initializing (H03)
Auto-tuning (P04，A13)
Writing function data
1 s Functions except above
W
Other writing 1 s
Writing function data (S08 – S11)
A
Writing function data
1 s
E Alarm reset 1 s
a –f，
，，
，m Selecting (option frame) 1 s
g –k Polling (option frame) 0.1 s
Note: Since the time described above is not the guaranteed response time, but is surely the time of
time-out for detecting abnormal, the response is returned earlier than that time.
Description) Retry
In the retry treatment, it is confirmed either to send the former data before no response again or to obtain a
normal response by polling (M26) for reading out the error content. (When confirming, it is necessary to
judge time-out again or not.)
In a case of normal response, since this shows any transiently abnormal transmission by noise etc., the
communication can be normally performed after this. (If this phenomena frequently occurs, investigation is
necessary since there is a possibility of any abnormality.)
In a case of no response again, retry further. When the times of retrying exceed the pre-determined value
(normally about 3 times), the problem in the hardware and the software of the upstream unit is expected.
The investigation is necessary after abnormal ending as no response of the designated station.
4-3-1 Polling procedure
Start
Normal end Abnormal end
Send request frame
Detect transmission abnormal
Send again correcting to the
normal format
Send again correcting to the
normal command
Send again correcting to the
normal function code
Receive response frame?
ACK response?
Format error?
Command error?
Function code error?
No
Yes
No
Yes
Yes
No
Yes
No
Yes
No

16
4-3-2 Selecting procedure
Start
Normal end Abnormal end
Send request frame
Detect transmission abnormal
Send again with normal
format.
Send again with normal
command.
Cannot operate via this
communication when connecting
link option.
Send again with normal
function code.
Written into the function of
forbidden writing (expected
forbidden change during
operation etc.)
Send again with normal
range of data.
Send again after finishing
writing.
(
Refer to M14: 15th bit.
)
No
Yes
No
Yes
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Cannot write during writing
function data from link option
Receive response frame?
ACK response?
Format error
Command error?
Priority of link?
Function code error?
Forbidden writing?
Data error?
Error during writing?
No writing right? Yes
No

17
4-4 Example of communication
Typical examples of communication are shown as follows. (The station address are made 12.)
4-4-1 Standard frame
[1] S05: Selecting frequency command (writing)
Request frame (host ⇒inverter) ･･･････････40.00 Hz command
SO
H
1 2
EN
Q
W S 0 5
SP 0 F A 0
ETX
8 1
ACK response frame (inverter ⇒host)
SO
H
1 2
ACK
W S 0 5
SP 0 F A 0
ETX
8 2
NAK response frame (inverter ⇒host) ･････Priority of link error
SO
H
1 2
NAK
W S 0 5
SP 0 0 4 C
ETX
8 1
[2] M09: Polling output frequency (reading)
Request frame (host ⇒inverter)
SO
H
1 2
EN
Q
R M 0 9
SP 0 0 0 0
ETX
5 3
ACK response frame (inverter ⇒host) ･････30.00 Hz
SOH
1 2
ACK
R M 0 9
SP 0 B B 8
ETX
8 0
4-4-2 Option frame
[1] Selection operation command (writing)
Request frame (host ⇒inverter) ･･･････････FWD command
SO
H
1 2
EN
Q
f 0 0 0 1
ETX
9 2
ACK response frame (inverter ⇒host)
SO
H
1 2
ACK
f
ETX
D 2
NAK response frame (inverter ⇒host) ･････Cause of error can be confirmed with "M26: Transmission
abnormal treatment code"
SO
H
1 2
NAK
f
ETX
E 1
[2] Polling actual torque value (reading)
Request frame (host ⇒inverter)
SO
H
1 2
EN
Q
h
ETX
D 3
ACK response frame (inverter ⇒host) ･････85.00%
SOH
1 2
ACK
h 2 1 3 4
ETX
9 E
[3] Selecting operation command in broadcast (writing)
Request frame (host ⇒inverter) ･･･････････REV command
SO
H
9 9
EN
Q
f 0 0 0 2
ETX
A 2
The response is not returned in broadcast,

18
4-5 Communication error
The errors detected by inverter as relating to communication are roughly categorized into transmission error,
logic error and communication interrupt error, and the treatment at detecting error differs respectively.
At detecting the transmission error (error codes 71 – 73), the information using with a negative response frame is
not performed. This is to avoid to be respond by plural inverters.
At detecting the logic error (error codes 74 – 81), the information using with a negative response frame is
performed. Because the negative response informs the cause (content of the error), perform the treatment (see
"4.3 Procedure on the host side") according to the content. However, in a case of the option frame, the cause is
not informed because of a frame configuration of prior processing speed and having no frame to send the cause.
If necessary to treat the error every cause, the cause can be confirmed by reading in M26 in the standard frame.
(In M26, the newest communication error code is stored.)
4-5-1 Communication error code
Error code Error name Description
71 （47H）Check sum error Not matching check sum values in the frame for own station.
72 （48H）Parity error Not matching the parities
73 （49H）Other error Received error other than the above errors
74 （4AH）Format error Incorrect transmission request character
The characters of end of text are not in the specified position.
75 （4BH）Command error Not existing command is sent.
76 （4CH）Priority of link error Intending to write operation command in the state mounted a link
option(If a link option has been mounted, the command data and
operation command cannot be written through RS485.)
77 （4DH）Error of no writing right Intending to write new function data during writing from a link option
78 （4EH）Function code error Requesting not existing function code
79 （4FH）Error of forbidden writing Intending to write the function of forbidden writing or function of
forbidden writing in operation during operation.
80 （50H）Data error Writing data exceeded an available range of writing.
81 （51H）Error during writing Intending to write new function data during writing a function.
4-5-2 Action at communication error
In case of occurring transmission errors (8 times continual) or transmission interruption error, the following
actions can be selected. However, if not receiving the first SOH ((normal data) after switching on of inverter
power supply or not operating by the communication (frequency command/operation command), the error action
is not performed.
1) Selecting action when occurring error (H32)
H32 Action at occurring error Remarks
0 Immediate forced stop Er8
1 Continue operation within H33 time and stop Er8
2 Continue operation till restoration of the
communication, and follow to designation of
communication. However, when not restoring
after H33 time, immediate forced stop
Er8
Keep the command just before
the error within H33 time, but
when restoring, operate
following to the designation of
communication.
3 Continue operation till restoration of the
communication, and after the restoration,
follow to designation of communication.
Automatic restoration
after restoring
communication
2) Setting time of timer at occurring error (H33)
0.0 – 60.0s

19
In a case of H32=0 (Mode of immediate forced stop at occurring communication error)
Communication
state
Display
Internal
operation
of inverter
Command
from RS485
Operation
command
FWD
Output
frequency
Setting
frequency
S
etting
frequency
Normal
Error
Normal
Normal Er8
Alarm reset
Coast-to-stop
StopOperation
ON
Operation
ON
Communication failure
In a case of H32=1, H33=5.0 s (Mode of immediate forced stop after 5 s at occurring communication error)
Normal
Error
Normal
Normal Er8
Alarm reset
In acceleration, even if occurring transmission
error,accelerated to the setting frequency.
Coast-to-stop
StopOperation
ON
Operation
ON
5.0s
*1
OFF
Command
from RS485
Internal
operation
of inverter
Communication
state
Display
Operation
command
FWD
Output
frequency
Setting
frequency
S
etting
frequency
*1) In a period until restoring the communication, the commands (command data and operation data) just before
the error are kept.