Lenze EMF2133IB - Page 100

Parameter data transfer
PROFIdrive parameter data channel
PROFIdrive DP−V1
8
l
100
EDSMF2133IB EN 5.0
8.3.1.4 Reading parameters
) Note!
ƒ When a read request is processed, no parameter value is written to the
slave.
ƒ A response to a read request does not contain the parameter attribute,
index and subindex.
ƒ When a multi−parameter read request is transferred, the parameter
attribute, index and subindex are repeated according to the number "n" of
the parameters requested.
ƒ A read request must not exceed the maximum data length of 240 bytes.
Request header
Byte 1 Byte 2 Byte 3 Byte 4
U8
Request reference
U8
Request identification
U8
Axis
U8
Number of indexes
Request reference: This value is specified by the master
Request identification: 0x01 (request parameter for reading)
Axis: 0x00 or 0x01
Number of indexes: 0x"n" (number of parameters requested)
Parameter attribute
Byte 5 Byte 6
U8
Attribute
U8
Number of
subindexes
Attribute: 0x10 (value)
Number of subindexes: 0x00
l For array parameters enter the number of array parameters requested.
Index and subindex
Byte 7 Byte 8 Byte 9 Byte 10
U16
Index
U16
Subindex
Index: 0x0001 ... 0xFFFF (1 ... 65535)
Subindex: 0x0001 ... 0xFFFF (1 ... 65535)
l 0x0000 for all non−array parameters