Service manual

www.enc.net.cn/en Tel/Fax:[phone] Appendix 3 Serial port RS485 communication protocol
171
Remark:
(1) “Setting data area” and “run data area” may not be existent in some
command/data frame format, so in protocol command list it’s marked with
“nothing”.
(2) In protocol effective character set is: ~, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F
and hex data 0DH，ASCII lowercase a, b, c, d, e, f are invalid.
(3) Effective command frame length is 14 or 18 byte.
1.2.5 Explanation and description for format
(1) frame head
It’s character“~”(namely hex 7E),single byte.
(2) auxiliary device address
Data meanings: local address of auxiliary device, double byte. ASCII format.
Inverter factory default is 01.
(3) mainframe command/auxiliary device respond
Data meanings: mainframe send out command and auxiliary device respond to
the command. Double byte, ASCII format.
Response code function classification:
Species 1>: command code=“10”，mainframe ask auxiliary device to report
current preparation state and control situation.
Table 1 response code meanings for command code“10”
Response
code
ASCII
Meanings
Preparation state of
auxiliar
y
device
Control from mainframe is
allowed
To set frequency is
allowed
10 Don’t get ready No meaning
11 Get ready Allow Allow
12 Get ready Allow Allow
13 Get ready Don’t allow Don’t allow
14 Get ready Don’t allow Don’t allow
20 Frame error
Species 2>: command code=“11”~“15”, 5 kinds of function command which
mainframe send to auxiliary device, for detail please see protocol command list.
Table 2 response code meanings for command code “11~15”
response
code
ASCII
Meanings of response code description
00
Auxiliary device communication and
control is normal；function code
modification is effective；
password is correct.
20 (1) frame checkout error； When this response code is reported,