IFM Ecomat 300 AC1355, Supplementary Device Manual

Page: 62 / 248

DP module 7: Command channel
Module 7, command 8:
read LAS (list of active slaves)
8-10
Example: Read LAS (list of active slaves) of slave group 1 on master 1
Request of DP master
Byte no. Value [hex] Description
1 08 08 = command 8
2 42
(slave no.
2
) → group 1
+ (master no.
1 * 64
)
+ (32, if B slave)
= 66
dec
=
42
hex
3 00 not used *)
4 00 not used *)
Response from controllere
Byte no. Value [hex] Description
1 08 copy of the request
2 42 copy of the request
3
03
hex
=
00000011
bin
→
table page 8-9 group 1:
slave 8(A) is active
slave 9(A) is active
4
FE
hex
=
11111110
bin
→
table page 8-9 group 1:
slaves 1(A) to 7(A) are active
*)
IMPORTANT:
For the query read only the required bytes. Unused bytes can contain information of
previous queries.