Lenze ELCAMZIxxx4SNNPSNN (LCU122) - Manual (Page 45)

PROFIsafe on board
Establishing of PROFIBUS communication
Configuration of the host
6
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45 EDSLCMX3024-SPS EN 5.0
Defining user data length
The user datalengthis defined during the PROFIBUS initialisation phase. You canconfigure
up to 10 process data words.
Optionally you can activate a parameter data channel. If the parameter data channel is
active, it additionally occupies 4 words of the process input and process output data.
ƒ PIW: process data input word
(process data from the motor starter to the master)
ƒ POW: process data output word
(process data from the master to the motor starter)
The user data lengths for process input data and process output data are identical. The
selection takes place via identification bytes in the configuration software for the
PROFIBUS system.
Parameter data channel Process data channel
Without /
with
Identification / user data length Identification / user data length
Without -
z Identification
– without consistency: 70
hex
... 79
hex
(112 ... 121)
– with consistency: F0
hex
... F9
hex
(240 ... 249)
z User data length: 1 ... 10 words
(POW/PIW 1 ... POW/PIW 10)
With
z Identification: F3
hex
(243)
z User data length: 4 words
(word 1 ... word 4)
z Identification
– without consistency: 70
hex
... 79
hex
(112 ... 121)
– with consistency: F0
hex
... F9
hex
(240 ... 249)
z User data length: 1 ... 10 words
(POW/PIW 1 ... POW/PIW 10)
General structure of the identification byte
MSB LSB
7 6 5 4 3 2 1 0
User data length
00 1 (byte / word)
...
15 16 (bytes / words)
Input/Output
00 Specific identification format
01 Input
10 Output
11 Input and output
Length/Format
0 Byte
1 Word
Consistency
0 Byte or word
1 Total length