IFM Ecomat 300 AC1355, Дополнительное руководство по устройству

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DP module 7: Command channel
Module 7, command 6:
read slave parameter
8-7
8.7 Module 7, command 6:
read slave parameter
Structure
Request of DP master
Bit
MM = master no. (1…2)
Byte
7 6 5 4 3 2 1 0
1
0 0 06
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
Bytes
7 6 5 4 3 2 1 0
1
D7 D6 0
2
0
D6 = command code
D7 = error code
→ page 7-20 , table at the bottom
3
projected parameter
4
current parameter
Example: Read slave parameter of slave 2(A) on AS-i master 1
Request of DP master
Byte no. Value [hex] Description
1 06 06 = command 6
2 42
(slave no.
2
)
+ (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 00
2 00
3 03 projected parameter
4 0F current parameter
*)
IMPORTANT:
For the query read only the required bytes. Unused bytes can contain information of
previous queries.