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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.
No.
Communication request is sent to the converter in
1)
accordance with the user program in the computer.
2)
Converter data processing time
Reply data from the converter
3)
(Data 1) is checked for an error)
4)
Computer processing delay time
Answer from computer in
5)
response to reply data 3).
(Data 3) is checked for error)
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)
Data writing format
Communication request data from the computer to the converter 1)
Format
1
2
3
ENQ
Station
A
number
ENQ
Station
A1
number
Reply data from the converter to the computer 3) (No data error detected)
Number of Characters
Format
1
2
3
ACK
Station
C
number
Reply data from the converter to the computer 3) (With data error)
Number of Characters
Format
1
2
3
NAK
Station
D
number
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)
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).
Operation
No error
(Request accepted)
With error
(Request rejected)
No error
(No converter
processing)
With error
(Converter outputs 3)
again.)
Number of Characters
4
5
6
7
8
Instruction
Data
code
Instruction
Data
code
4
4
5
Error
code
9999, create a communication request data without "waiting time" in the data format. (The number of
Description of parameters
Parameter/
Converter
Monitor
Reset
Write
A
A
A1
Present
Absent
C
C
D
D
10ms or more
Absent
Absent
Absent
Absent
9
10
11
12
13
Sum
check
Sum
check
Parameter
Monitor
Read
B
B
Present
Present
E
E
E1
D
D
Absent (C)
Absent (C)
F
F
99
3
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