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3
PARAMETERS
Description of parameters
(3) Communication operation presence/absence and data format types
Data communication between the computer and converter is made in ASCII code (hexadecimal code).
Communication operation presence/absence and data format types are as follows.
Data writing format
Communication request data from the computer to the converter 1)
Reply data from the converter to the computer 3) (No data error detected)
Reply data from the converter to the computer 3) (With data error)
No. Operation
Parameter/
Monitor
Write
Converter
Reset
Monitor
Parameter
Read
1)
Communication request is sent to the converter in
accordance with the user program in the computer.
A
A1
ABB
2)
Converter data processing time Present Absent Present Present
3)
Reply data from the converter
(Data 1) is checked for an error)
No error
(Request accepted)
CC
E
E1
E
With error
(Request rejected)
DD
DD
4)
Computer processing delay time 10ms or more
5)
Answer from computer in
response to reply data 3).
(Data 3) is checked for error)
No error
(No converter
processing)
Absent Absent Absent (C) Absent (C)
With error
(Converter outputs 3)
again.)
Absent Absent F F
In the communication request data from the computer to the converter, 10ms or more is also required after "no data error (ACK)".(Refer to page 101)
Reply from the converter to the converter reset request can be selected. (Refer to page 106)
Format
Number of Characters
1 2 3 4 5 6 7 8 9 10 11 12 13
A
ENQ
Station
number
Instruction
code
Data
Sum
check
A1
ENQ
Station
number
Instruction
code
Data
Sum
check
Format
Number of Characters
1 2 3 4
C
ACK
Station
number
Format
Number of Characters
1 2 3 4 5
D
NAK
Station
number
Error
code
Indicate a control code
Specify the station numbers between H00 and H1F (stations 0 to 31) in hexadecimal.
Waiting time
When Pr. 123 (Waiting time setting)
9999, create a 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 converter, 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 converter according to the computer. Whether the CR and LF
codes will be present or absent can be selected using Pr. 124 (CR/LF selection).
HC2.book 99 ページ ２０１２年１１月１９日 月曜日 午前１０時５２分