Lenze EPM-T1 Series - Page 234

Transmitting parameter data
Writing a parameter (example)
9
Network via CANopen
9.4
9.4.2
L
9.4−4
EDSPM−TXXX−9.0−11/2009
9.4.2 Writing a parameter (example)
An I/O system IP20 has the node address 2. For the first analog module (4×analog
output), the function of the output A.0 (voltage signal 0 ... +10 V, 12 bits) is to be
shown.
Formula Information
Identifier = Basic identifier + node address
= 1536 + 2 =1538 = 602
h
· Basic identifier for parameter channel 1 (output) = 1536
· Node address of the I/O system IP20 = 2
Instruction
code:
= 23
h
· Command Write Request" (transmitting parameters to
the I/O system IP20)
Index = I3001
h
· Index first analog module
Subindex = 1 · Subindex = 1 (function for output A.1 among others)
Data 1
Data 2
Data 3
Data 4
Data 1 ... 4
= 00
h
= 00
h
= 05
h
= 3B
h
= 00 00 05 3B
h
· Diagnostics (Lenze setting)
· Reserved
· Output A.0 (voltage signal 0 ... +10 V, 12 bits)
· Output A.1 (Lenze setting)
11 Bit 8 bytes of user data
Identifier
Instruction
code:
Index
Subindex Data 1 Data 2 Data 3 Data 4
LOW byte HIGH byte
602
h
23
h
01
h
30
h
1 00
h
00
h
05
h
3Bh
(LSB) (MSB)
L
0
1
L
Write Request
Write Response
Identifier = 1538
Identifier = 1410
epm−t118
Fig. 9.4−1 Writing a parameter
Formula Information
Identifier = Basic identifier + node address
= 1408 + 2
= 1410
· Basic identifier for parameter channel 1 (input) = 1408
· Node address of the I/O system IP20 = 2
Instruction
code:
= 60
h
· Command Write Response" (acknowledgement from the
I/O system IP20)
Index = Index of the read request
Subindex = Subindex of the read request
Data 1 ... 4 = 0 · Acknowledgement only
11 Bit 8 bytes of user data
Identifier
Instruction
code:
Index
Subindex Data 1 Data 2 Data 3 Data 4
LOW byte HIGH byte
1410 60
h
01
h
30
h
0 0 0 0 3
Task
Telegram to the I/O system IP20
Telegram from the I/O
system IP20 (acknowledgement
when being executed faultlessly)