Lenze DDS System bus CAN for PLC - Manual (Page 27)

System bus (CAN) for Lenze PLC devices
General information
2−15
l
PLC−Systembus EN 2.0
2.7.2 Writing parameters (example)
Task
The acceleration time (C0012) of the controller with the node address 1 is to be set to 20 s via the
parameter data channel 1.
Telegram to the controller
Formula Information
Identifier = basic identifier + node address
= 1536 + 1
= 1537
·
Basic identifier for parameter data channel 1 (output) = 1536
·
Node address of the controller = 1
Command code = 23
hex
·
Command "Write Request" (send parameter to controller)
Index = 24575 − number of the Lenze code
= 24575 − 12
= 24563
= 5F F3
hex
·
Code = C0012 (acceleration time)
Subindex = 0
·
Subcode = 0 (no subcode)
Data 1 ... 4 = 20 x 10000
= 200000
= 00 03 0D 40
hex
·
Value = 20 s
·
Fixed32 data format (4 fixed decimal positions); multiply value by 10000
11bit 8 bytes user data
Identifier
Command
code
Index
Subindex Data 1 Data 2 Data 3 Data 4
Low byte High byte
1537 23
hex
F3
hex
5F
hex
0 40
hex
0D
hex
03
hex
00
hex
(LSB) (MSB)
Identifier = 1537
L
SDO 1 / Node-ID 1
Identifier = 1409
Write Request
(C0012 = 20 s)
Write Response
Fig. 2−5 Writing parameters