Mitsubishi Electric FR-E700EX Instruction Manual page 212

Communication operation and setting
(3) Communication operation presence/absence and data format types
 Data communication between the computer and drive unit is made in ASCII code (hexadecimal code).
 Communication operation presence/absence and data format types are as follows:
No. Operation
Communication request is sent to the
1) drive unit in accordance with the user
program in the computer.
2)
Drive unit data processing time
Reply data from the
3) drive unit (Data 1) is
checked for error)
4) Computer processing delay time
Answer from
computer in response
5)
to reply data 3).
(Data 3) is checked
for error)

In the communication request data from the computer to the drive unit, 10ms or more is also required after "no data error (ACK)". (Refer to page 212)

Reply from the drive unit to the drive unit reset request can be selected. (Refer to page 216)

When any of "0.01 to 9998" is set in Pr.37 and "01" in instruction code HFF sets data format to A2 or E2. In addition, data format is always A2 and E2
for read or write of Pr.37.

At mode error, and data range error, C1 data contains an error code. (Refer to page 221) Except for those errors, the error is returned with data format D.
 Data writing format
Communication request data from the computer to the drive unit 1)
Format
1 2 3
Drive unit
ENQ
station
A



number
Drive unit
ENQ
A1 station



number
Drive unit
ENQ
A2 station



number
Drive unit
ENQ
A3 station



number
Reply data from the drive unit to the computer 3) (No data error detected)
Format
1 2 3
Drive unit
ACK
C station



number
Drive unit
STX
station
C1



number
Reply data from the drive unit to the computer 3) (With data error)
Number of Characters
Format
1 2 3
Drive unit
NAK
D station



number

Indicate a control code

Specify the drive unit station numbers between H00 and H1F (stations 0 to 31) in hexadecimal.

When the Pr.123 PU communication waiting time is other than 9999, create the communication request data without "waiting time" in the data format. (The
number of characters decreases by 1.)

CR, LF code
When data is transmitted from the computer to the drive unit, codes CR (carriage return) and LF (line feed) are automatically set at the end of a data group
on some computers. In this case, setting must also be made on the drive unit according to the computer. Whether the CR and LF codes will be present or
absent can be selected using Pr.124 PU communication CR/LF selection.
210
Run
Command
A1
Present
No error
(Request C
accepted)
With error.
(Request D
rejected)
No error
(No drive unit Absent
processing)
With error.
(Drive unit
Absent
outputs 3)
again.)
4 5 6 7 8
Instruction

code
Instruction

Data
code
Instruction

code
Send Receive
Instruction

data data
code
type type
4 5 6 7

Send Receive Error Error
data data code code
type type 1 2
4 5
Error

code
Operation Multi Parameter
speed command Write

A, A2 A3 A, A2

Present Present Present
C1 
C
D D
10ms or more
Absent Absent (C) Absent
Absent F Absent
Number of Characters
9 10 11 12
Data Sum check

Sum check
Data
Data1
Number of Characters
8 9 10 11 12
Data1
Drive unit
Monitor
reset
A B
Present Present
E, E1, E2,
C C
E3
D D D
Absent Absent (C) Absent (C)
Absent F
13 14 15 16 17


Sum check
Data2 Sum check
13 14 15 16 17
ETX
Data2 Sum check

Parameter
Read
B
Present
E, E2
D
F
18 19

18 19
