Mitsubishi Electric FR-CC2-P Instruction Manual page 121

(N) Operation via communication and its settings
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.
Symbol
Communication request is sent to the converter unit in
a
accordance with the user program in the computer.
b Converter unit data processing time
Reply data from the computer
c unit (Data (a) is checked for
an error)
d Computer processing delay time
Answer from computer in
e response to reply data c
(Data c is checked for error)

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
• Data writing format
a. Communication request data from the computer to the converter unit
Format
1 2
ENQ Converter unit
A
station No.

ENQ Converter unit
A1
station No.

c. Reply data from the converter unit to the computer (No data error detected)
Number of characters
Format
1 2
ACK Converter unit
C
station No.

c. Reply data from the converter unit to the computer (Data error detected)
Format
1
NAK
D


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).
120
PARAMETER
Operation
No error

(Request accepted)
With error
(Request rejected)
No error

(No converter unit
processing)
With error
(Converter unit
outputs c again.)
Number of characters
3 4 5 6
Instruction
Data

code

Instruction
Data

code

3 4


Number of characters
2 3
Converter unit Error
station No. code

Special
monitor write
A1
With
C
D
10 ms or more
Without
Without
7 8 9 10
Sum check
Sum

check
4 5

Pr. Converter
Monitor
write reset
A A B
With Without With
E, E1,
C C

E2, E3
D D D

Without
Without Without
(C)
Without Without F
page 128.)
11 12 13

Pr. read
B
With
E
D
Without
(C)
F