ifm
Supplementary device manual DeviceNet interface in the AS-i ControllerE (AC1318, AC1324), Target from 15
2012-02-29
The host command channel
Commands in the host command channel
179
Response from device to host
10824
DW
Data content
Bit
DW
3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
0
9
0
8
0
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
Word n+1
Word n
Bit
word
1
5
1
4
1
3
1
2
1
1
1
0
0
9
0
8
0
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
1
5
1
4
1
3
1
2
1
1
1
0
0
9
0
8
0
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
DW 1
T
G
S
T
reflected slave
address
F
res.
DL
E S M
reflected user ID
reflected command number
2...9
not
changed
Legend:
E
error bit
1 bit
0 = no error detected
1 = error when executing the command
S
sequence bit
1 bit
a large data packet is transmitted in several partial sequences:
0 = data transmission completed
1 = data transmission not yet completed, at least one more packet follows
M
master no.
1 bit
0 = master 1
1 = master 2
ST
slave type
1 bit
0 = single slave or A slave
1 = B slave (= addition of 20
hex
or 32
dec
to the slave address)
TG
toggle bit
1 bit
value changes for each execution of the command
F
error bit
1 bit
0 = no error detected
1 = error when executing the command
DL
data length
6 bits
number of bytes to be transferred
permitted values: 01…20
hex
= 01…32
dec
(
data sheet of the slave)
NOTE
The number of the bytes to be sent must be divisible by 2 since the system always can transmit only
multiples of 2 bytes in the S7.4 protocol.
The control bytes defined in profile 7.4 with follow bit and valid bit are automatically added by the
system. Therefore, without segmentation, this command is limited to 20 bytes of parameter data. Larger
data volumes must be divided into several segments.
