IFM Ecomat 300 AC1355, Supplementary Device Manual

Page: 113 / 248

DP module 12: Extended command channel
Module 12, extended command 34dec (22hex):
read parameter character string of an AS-i slave with the profile S-7.4
9-37
9.19 Module 12, extended command 34
dec
(22
hex
):
read parameter character string of an AS-i slave with the profile S-7.4
Request of DP master
Bit
Word
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
1
R
S
0/1
M
0/1
user ID command number = 22
hex
= 34
dec
2
reserved = 0 reserved = 0
3
R R R slave address R R R data length
4…18
not used
Legend → page 9-3
Example:
Word no. Value [hex] Description
1 0822
0xxx = command only requests 1 data packet
M=0: AS-i master 1
08 = user ID changes e.g. to 8
22 = command number 34
2 0300
03 = slave address 3
00 = data length = 0
Response from controllere (gateway)
Bit
Word
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
1
E=0
S
0/1
M
0/1
reflected user ID reflected command number = 21
hex
2
TG R slave address F=0 R R number of bytes to be received
3
parameter character string 1 parameter character string 0
4…16
parameter character string 2...27
17
parameter character string 29 parameter character string 28
18
reserved
Legend → page 9-3
Example:
Word no. Value [hex] Description
1 0822
data transfer completed
M=0: AS-i master 1
08 = reflected user ID 8
22 = reflected command number 34
2
0
604
or
8
604
x6 = slave address 3 shifted 1 bit to the left
→
3 * 2 = 6
04 = 4 byte ID data
the most significant bit (TG) changes after each execution
3 1234 1st word of the parameter character string of slave 3
4 5678 2nd word of the parameter character string of slave 3
5…18 0000 reserved
Note:
The control bytes defined in profile 7.4 with follow and valid bits are filtered out by the system.