IFM Ecomat 300 AC1355, Supplementary Device Manual

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The DPV1 command channel
DPV1 command 21dec (15hex):
read ID string of an AS-i slave with the profile S-7.4
11-24
I/O
Direction of data for the devices with E type <> 3
Length: 1 bits
Permitted values: 0/1
Description:
0 = input
1 = output
Number of
parameters to be
read
Number of bytes which can be read as parameter string
Length: 8 bits
Permitted values: 0...219
dec
Description:
0 = no parameter string readable
1...219
dec
= number of bytes
Number of
parameters to be
written
Number of bytes which can be written as parameter string
Length: 8 bits
Permitted values: 0…219
dec
Description:
0 = no parameter string readable
1…219
dec
= number of bytes
2D
Double data transfer possible ( → redundancy)
Length: 1 bit
Permitted values: 0/1
Description: 0 = simple data transfer
DT-Start Start triple (information for the driver in the master)
DT-Count Number of data triples (information for the driver in the master)
EDT Read Reserved for later profiles
EDT Write Reserved for later profiles
Diag
Slave supports the 7.4 diagnosis string
Length: 1 bit
Permitted values: 0/1
Description:
0 = diagnosis string is not supported
1 = diagnosis string is supported
Manufacturer
identification
Defined manufacturer number assigned by AS-International
Device-specific
information
As an option more bytes for the manufacturer-specific device description
Example:
Word no. Value [hex] Description
1 026F
02 = reflected user ID 2
6F = command status is "ready" (no fault)
2
0615
or
8615
06
hex
= 00
00 011
0
2
→ slave address = 3
15
hex
= reflected command number 21
dec
the most significant bit TG changes after each execution
3 2D01 1
st
word of the ID string of slave 3
4 0203 2
nd
word of the ID string of slave 3
… … …
17 0008 in this case the unit sends an ID string of 8-byte length