Emerson EV2000 Series User Manual

114 Appendix 3 Communication Protocol
EV2000 Series Universal Variable Speed Drive User Manual
4 Protocol Format
A
B
B
C
command frame of master
command frame of master
IF
F
J
IF
F
B
B
I IE E
sending
sequence
123456789
1610 11 12 13 14 15
definition
data setting
verification
index
Command
Add
head
D
D
1817
2
2
14441
sending
byte
C
A
B
B
H
command frame of master
command frame of master
IF F
J
IF F
B
B
I IE E
sending
sequence
123456789 1610 11 12 13 14 15
definition
data setting
IndexResponse
Add
head
G G
1817
2
2
14441
sending
byte
H
verification
tail
tail
Where:
A: Frame head B: Slave address, C: Master command D: Auxiliary index E: Index or command F: Data setting
G: Index of Slave H: Response of Slave I: Verify checksum J: Frame tail
“Configuration data section” and “operation data section” may not exist in the concrete protocol frame. In that case, they
are labeled with “NULL” in the protocol list.
In the protocol, the effective characters are: ~, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F and hex ODH. And the
low-case ASCII letters such as a, b, d, e, f are invalid.
The frame for effective command has 14 or 18 bytes. Sometimes, the response frame has 10 bytes, e.g. invalid
command or data overflow.
EV2000 supports commands of Group 3 and 4 for an interim period to be compatible with your previous developed
basic operating functions of the host software. It is suggested to use Group 6~7 commands instead of Group 3~4
command in your new host communication program.
5 Explanations of Format
5.1 Head of Frame
“~” means 7E (hex), single byte.

Emerson EV2000 Series Specifications

General

Brand	Emerson
Model	EV2000 Series
Category	DC Drives
Language	English