IFM Ecomat 300 AC1355, Дополнительное руководство по устройству

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DP module 7: Command channel
Module 7, command 11dec (0Bhex):
read LPS (list of projected slaves)
8-13
8.12 Module 7, command 11
dec
(0B
hex
):
read LPS (list of projected slaves)
The 2 feedback bytes can only give information about max. 16 slaves. Therefore the slaves are
divided into 4 groups (
→
table page 8-9 ).
Structure
Request of DP master
Bit
MM = master no. (1…2)
Byte
7 6 5 4 3 2 1 0
1
0 0 0B
hex
X = slave type (0…1)
0 = standard / A slave
1 = B slave
2
MM X SSSSS
SSSSS = slave no. (0…31
dec
)
3
0
not used *)
4
0
not used *)
Response from controllere
Bit
Byte
7 6 5 4 3 2 1 0
1
D7 D6 0B
hex
2
copy of the request
D6 = command code
D7 = error code
→
page 7-20 , table at the bottom
3
→
table page 8-9
4
→
table page 8-9
provides the addresses of the projected slaves in this
address group
Example: Read LPS (list of projected slaves) of slave group 2 on AS-i master 1
Request of DP master
Byte no. Value [hex] Description
1 0B 0B = command 11
2 54
(slave no.
20
)
→
group 2
+ (master no.
1 * 64
)
+ (32, if B slave)
= 84
dec
=
54
hex
3 00 not used *)
4 00 not used *)
Response from controllere
Byte no. Value [hex] Description
1 0B copy of the request
2 54 copy of the request
3
02
hex
=
00000010
bin
→
table page 8-9 group 2:
slave 26(A) is projected
4
FE
hex
=
11111110
bin
→
table page 8-9 group 2:
slaves 17(A) to 23(A) are projected
*)
IMPORTANT:
For the query read only the required bytes. Unused bytes can contain information of
previous queries.