Lenze I/O system 1000 System Manual - Manual (Page 280)

CANopen communication
Transmitting parameter data
Reading a parameter (example)
8
l
280 EDSIO1000 EN 7.0
8.4.3 Reading a parameter (example)
Task
An I/O system 1000 has been assigned node address 2. The function of the first channel is
to be read at the first analog I/O compound module (EPM−S500, 2 analog outputs 0 ... 10 V).
Telegram to the I/O system
Formula Information
Identifier = Basic identifier + node address
= 1536 + 2 =1538 = 602
h
l Basic identifier for parameter channel 1 (output) =
1536
l Node address of the I/O system = 2
Instruction code = 40
h
l Read Request command (request for reading a
parameter of the I/O system)
Index = I3100
h
l First channel of the analog module
Subindex = 1 l First analog module
Data 1
Data 2
Data 3
Data 4
Data 1 ... 4 = 00
h
= 00
h
= 00
h
= 00
h
= 00 00 00 00
h
l Read request only
11 bits Eight bytes of user data
Identifier
Instructio
n code
Index
Subindex Data 1 Data 2 Data 3 Data 4
LOW byte HIGH byte
Data 1 Data 2 Data 3 Data 4
602
h
40
h
00
h
31
h
1 0F
h
00
h
00
h
00
h
(LSB) (MSB)
Read Request
Read Response
Identifier = 1538
Identifier = 1410
SLIO009
Fig. 8−11 Reading a parameter