Lenze EMF2178IB - Manual (Page 73)

Parameter data transfer
Structure of the parameter data telegram
10
l
73 EDSMF2178IB EN 3.0
10.3 Structure of the parameter data telegram
User data (up to 8 bytes)
Byte 1 2nd byte 3rd byte Byte 4 Byte 5 Byte 6 7th byte Byte 8
Command
Index
Low byte
Index
High byte
Subindex
Data 1 Data 2 Data 3 Data 4
Low word High word
Low byte High byte Low byte High byte
Error code
)
Note!
User data are displayed in the left−justified INTEL format.
(Calculation examples:
^ 77)
Command
The command contains the services for writing and reading parameters and information
about the user data length.
Structure of a command:
Command
Bit 7
MSB Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
LSB
Note Command Specifier (cs) 0 Length e s
Write request 0 0 1 0 x x 1 1 User data length coding
in bits 2 and 3:
l 0b00 = 4 bytes
l 0b01 = 3 bytes
l 0b10 = 2 bytes
l 0b11 = 1 byte
Write response 0 1 1 0 x x 0 0
Read request 0 1 0 0 x x 0 0
Read response 0 1 0 0 x x 1 1
Error response 1 0 0 0 0 0 0 0
The following information is contained/must be entered in the command.
Command
4−byte data
(bytes 5 ... 8)
2−byte data
(bytes 5 and 6)
1−byte data
(byte 5)
Block
hex dec hex dec hex dec hex dec
Write request
(Send parameters to drive) 0x23 35 0x2B 43 0x2F 47
Writing not
possible
Write response
(Controller response to write
request (acknowledgement)) 0x60 96 0x60 96 0x60 96
Read request
(Request to read a parameter
from the controller) 0x40 64 0x40 64 0x40 64 0x40 64
Read response
(Response to the read
request with an actual value) 0x43 67 0x4B 75 0x4F 79 0x41 65
Error response
(Controller indicates a
communication error) 0x80 128 0x80 128 0x80 128 0x80 128