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Manual – MOVI-PLC® advanced DHF41B DeviceNet and PROFIBUS DP-V1 Fieldbus Interfaces
11
Structure of the DP-V1 parameter channel
Functions of PROFIBUS DP-V1
11.3.4 MOVILINK
®
parameter requests
The MOVILINK
®
parameter channel of the SEW inverter is directly mapped in the
structure of data set 47. The Request ID 0x40 (SEW MOVILINK
®
service) is used for the
exchange of MOVILINK
®
parameter setting requests. Parameter access with
MOVILINK
®
services usually takes place according to the structure described below.
The typical message sequence for data set 47 is used.
Request ID:
0x40 SEW MOVILINK
®
service
The actual service is defined by the data set element
Attribute
in the MOVILINK
®
parameter channel. The high nibble of this element corresponds to the service nibble in
the management byte of the DP parameter channel.
Example for
reading a
parameter via
MOVILINK
®
The following tables show an example of the structure of the WRITE.request and
READ.res user data for reading an individual parameter via the MOVILINK
®
parameter
channel. In the example, the firmware of MOVIDRIVE
®
B connected to CAN 1 of the
DHF41B option is read with SBus address 1.
Sending a parameter request
The following table shows the coding of the user data for the
WRITE.req
service
specifying the DP-V1 header. The
WRITE.req
service is used to transfer the parameter
setting request to the inverter. The firmware version is read.
Query parameter response
The following table shows the coding of the READ.req USER DATA including the DP-
V1 header.
Service:
WRITE.request
Description
Slot_Number
0
Random, (is not evaluated)
Index
47
Index of the data record; constant index 47
Length
10
10 byte user data for parameter request
Byte
Field
Value
Description
0
Request reference
0x01
Individual reference number for the parameter
setting request is mirrored in the parameter
response.
1
Request ID
0x40
SEW MOVILINK
®
service
2
SBus address of the unit
connected to the gate-
way
0x01
Axis number; 1 = SBus address 1 at CAN 1
3
No. of parameters
0x01
1 parameter
4
Attribute
0x10
MOVILINK
®
service "READ parameter"
5
No. of elements
0x00
0 = access to direct value, no subelement
6, 7
Parameter Number
0x206C
MOVILINK
®
index 8300 = "Firmware version"
8, 9
Subindex
0x0000
Subindex 0
Service:
READ.request
Description
Slot_Number
0
Random, (is not evaluated)
Index
47
Index of the data set; constant index 47
Length
240
Maximum length of response buffer in the DP-V1 master
0
0
I
Summary of Contents for DHF41B
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