221
Communication operation and setting
4
PARAMETERS
Data reading format
Communication request data from the computer to the inverter 1)
Reply data from the inverter to the computer 3) (No data error detected)
Reply data from the inverter to the computer 3) (With data error)
Send data from the computer to the inverter 5)
Format Number of Characters
123456789
BENQ
*1
Inverter
station number *2 Instruction code *3 Sum
check *4
Format Number of Characters
12345678910 11 12 13
ESTX
*1
Inverter
station number *2 Read data ETX
*1
Sum
check *4
E1 STX
*1
Inverter
station number *2 Read data ETX
*1
Sum
check *4
E2 STX
*1
Inverter
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
Inverter
station number *2 Read data (Inverter model information) ETX
*1
Sum
check *4
Format Number of Characters
12345
DNAK
*1
Inverter
station number *2
Error
code *4
Format Number of Characters
1 2 3 4
C
(Without
data error)
ACK
*1
Inverter
station number *2 *4
F
(With data
error)
NAK
*1
Inverter
station number *2 *4
*1 Indicate a control code
*2 Specify the inverter station numbers between H00 and H1F (stations 0 to 31) in hexadecimal.
*3 When Pr.123 and Pr.337 (Waiting time setting) ≠ 9999, create a 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 inverter, 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 inverter 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.