176
Communication operation and setting
Reply data from the drive unit to the computer 3) (With data error)
Data reading format
Communication request data from the computer to the drive unit 1)
Reply data from the drive unit to the computer 3) (No data error detected)
Reply data from the drive unit to the computer 3) (With data error)
Send data from the computer to the drive unit 5)
Format
Number of Characters
1 2 3 4 5
D
NAK
∗1
Drive unit
station
number
∗2
Error
code
∗4
∗1 Indicate a control code
∗2 Specify the drive unit station numbers between H00 and H1F (stations 0 to 31) in hexadecimal.
∗3 Set waiting time. When the Pr. 123 PU communication waiting time setting is other than "9999", create the communication request data without "waiting time"
in the data format. (The number of characters decreases by 1.)
∗4 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.
Format
Number of Characters
1 2 3 4 5 6 7 8 9
B
ENQ
∗1
Drive unit
station number
∗2
Instruction code
∗3
Sum
check
∗4
Format
Number of Characters
1 2 3 4 5 6 7 8 9 10 11 12 13
E
STX
∗1
Drive unit
station number
∗2
Read data
ETX
∗1
Sum
check
∗4
E1
STX
∗1
Drive unit
station number
∗2
Read data
ETX
∗1
Sum
check
∗4
E2
STX
∗1
Drive unit
station number
∗2
Read data
ETX
∗1
Sum
check
∗4
Format
Number of Characters
1 2 3 4 to 23 24 25 26 27
E3
STX
∗1
Drive unit
station number
∗2
Read data (Drive unit model information)
ETX
∗1
Sum
check
∗4
Format
Number of Characters
1 2 3 4 5
D
NAK
∗1
Drive unit
station number
∗2
Error
code
∗4
Format
Number of Characters
1 2 3 4
C
(Without
data error)
ACK
∗1
Drive unit
station number
∗2
∗4
F
(With data
error)
NAK
∗1
Drive unit
station number
∗2
∗4
∗1 Indicate a control code
∗2 Specify the drive unit station numbers between H00 and H1F (stations 0 to 31) in hexadecimal.
∗3 Set waiting time. When the Pr. 123 PU communication waiting time setting is other than 9999, create the communication request data without "waiting time"
in the data format. (The number of characters decreases by 1.)
∗4 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.
