Emerson EV1000-2S0004G User Manual page 78

76 Appendix 2 Communication Protocol
Protocol data unit format of modifying single drive's
parameter:
Request format::
Protocol data unit Data length (bytes)
Parameter
Register Address
Register content
Response format:
Protocol data unit Data length (bytes)
Parameter
Register Address
Register content
If the operation fails, error code and exception code will be
replied. The error code is (Parameter+0x80) . The exception
code denotes reason of the error; see Table 1.
Protocol data unit format of serial line diagnosis:
Request format:
Protocol data unit Data length (bytes)
Function code
Sub-function code
Data
Response format:
Protocol data unit Data length (bytes)
Function code
Sub-function code
Data
If the operation fails, error code and message code will be
replied. The error code is 88H. The exception code denotes
reason of the error; see Table 1.
Sub-function of line diagnosis:
Sub-function Data
code (request)
0x0000
0x0001
0xFF00
"new "new
frame tail" frame tail"
and "00" and "00"
0x0003
occupy occupy the
the MSB MSB and
and LSB LSB
No
0x0004 0x0000
response
0x0000 0x0000
0x0030
0x0001 0x0001
Range
1 0x06
2 0x0000~0xFFFF
2 0x0000~0xFFFF
Range
1 0x06
2 0x0000~0xFFFF
2 0x0000~0xFFFF
Range
1 0x08
2 0x0000~0x0030
2 0x0000~0xFFFF
Range
1 0x08
2 0x0000~0x0030
2 0x0000~0xFFFF
Data
Meaning
(respond)
0x0000 Initialize the
communication, disable
0xFF00
no-reply mode
To set frame tail in ASCII
mode. It will replace the
old line feed character. It
will not be saved upon
power-off. Note: it must
not be greater than 0x7F,
nor equal to 0x3A.
To set no-response
mode, so the drive
respond only to "initialize
communication" request.
It is to isolate the faulty
drive.
Drive not respond to
error or invalid command
Drive responds to error
or invalid command
EV1000 Series General Purpose Variable Speed Drive User Manual
Protocol data unit format of modifying several drive's
parameter and status parameters:
Request format:
Data length
Protocol data unit
Function code
Initial register address
Register Qty.
Register bytes number
Register contents 2* Register Qty.
Response format:
Data length
Protocol data unit
(bytes)
Function code
Initial Register Address
Register Qty.
Parameter 0x41 is to modify single drive's parameter or
control parameter and save it in an involatile memory. The
format is similar with that of 0x06. The only difference is that
0x41 parameter is saved upon power failure, while 0x06 not.
Since some of the control parameters cannot be saved in the
involatile memory, the two commands in this case have the
same effect. Those parameters will be introduced later.
The management of parameters includes reading out the
upper and lower limit of the parameters, parameters
properties, max. index number of a parameter group, next or
previous parameter group number, currently displayed
status parameter index, or display the next status parameter.
Parameter property includes R/W property, parameter unit,
scaling, etc. These commands are helpful to provide
information about parameter's range and properties etc.,
which are necessary for modifying parameters remotely. The
protocol data unit of parameter management is as follows:
Request format:
Protocol data unit Data length (bytes)
Function code
Sub-function code
Data
Response format:
Protocol data unit Data length (bytes)
Function code
Sub-function code
Data
If the operation fails, error codes and exception code will be
replied. The exception code is shown in Table 1.
Sub-function of parameter management
Range
(bytes)
1 0x10
2 0x0000~0xFFFF
2 0x0001~0x0004
1 2* Register Qty.
Range
1 0x10
2 0x0000~0xFFFF
2 0x0001~0x0004
Range
1 0x42
2 0x0000~0x0007
It depends on drive's
2
type
Range
1 0x42
2 0x0000~0x0007
2 0x0000~0xFFFF