Mitsubishi Electric FR-CC2-P, Instruction Manual

Page: 121 / 184

(N) Operation via communication and its settings
120
PARAMETER
 Communication operation presence/absence and data format types
• Data communication between the computer and the converter unit is made in ASCII code (hexadecimal code).
• Communication operation presence/absence and data format types are as follows.
• Data writing format
a . Communication request data from the computer to the converter unit
c. Reply data from the converter unit to the computer (No data error detected)
c. Reply data from the converter unit to the computer (Data error detected)

Indicates a control code.

Specifies the converter unit station numbers in the range of H00 to H1F (stations 0 to 31) in hexadecimal.

Set the delay time. When a value other than "9999" is set in Pr.123 PU communication waiting time setting , create the communication
request data without "delay time" in the data format. (The number of characters decreases by 1.)

CR, LF code: When data is transmitted from the computer to the converter 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 be also made on the converter unit according to the computer.
Whether the CR and LF codes will be present or absent can be selected using
Pr.124 (CR/LF selection) .
Symbol Operation
Special
monitor write
Pr.
write
Converter
reset
Monitor Pr. read
a
Communication request is sent to the converter unit in
accordance with the user program in the computer.
A1 A A B B
b Converter unit data processing time With With Without With With
c
Reply data from the computer
unit (Data
(a) is checked for
an error)
No error

(Request accepted)
C C C

E, E1,
E2, E3
E
With error
(Request rejected)
D D D

D D
d Computer processing delay time 10 ms or more
e
Answer from computer in
response to reply data
c
(Data c is checked for error)
No error

(No converter unit
processing)
Without Without Without
Without
(C) Without
(C)
With error
(Converter unit
outputs c again.)
Without Without Without F F

In the communication request data from the computer to the converter unit, 10 ms or more is also required after "no data error (ACK)". (Refer
page 123 .)

Reply from the converter unit to the converter reset request can be selected. (Refer to page 128 .)
Format
Number of characters
1 2 3 4 5 6 7 8 9 10 11 12 13
A
ENQ

Converter unit
station No.

Instruction
code

Data Sum check

A1
ENQ

Converter unit
station No.

Instruction
code

Data
Sum
check

Format
Number of characters
1 2 3 4
C
ACK

Converter unit
station No.


Format
Number of characters
1 2 3 4 5
D
NAK

Converter unit
station No.

Error
code
