SEW-Eurodrive MOVI-PLC basic DHP11B-T0, Руководство пользователя

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6
PROFIBUS-DP-V1 Functions
Structure of the DP-V1 parameter channel
Manual – MOVI-PLC
®
basic DHP11B.. controller
69
PROFIdrive
parameter
requests The PROFIdrive parameter channel of the MOVI-PLC
®
basic DHP11B.. controller is
directly mapped in the structure of data set 47. Parameter access with PROFIdrive
services usually takes place according to the structure described below. The typical tele-
gram sequence for data set 47 is used. PROFIdrive only defines the two request IDs
•
Request ID: 0x01Request parameter (PROFIdrive)
• Request ID: 0x02Change parameter (PROFIdrive)
This means that there is restricted data access in comparison with the MOVILINK
®
services.
Example for
reading a
parameter via
PROFIdrive 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.
Sending parameter request
The following table displays the code 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 MOVI-PLC
®
basic DHP11B.. controller.
If request ID 0x02 = change parameter (PROFIdrive) is set, remanent write access to
the selected parameters is preserved. Consequently, the internal flash of the MOVI-
PLC
®
basic DHP11B.. controller is written with each write access. Use the MOVILINK
®
service Write parameter volatile service if parameters must be written cyclically at short
intervals. With this service, you only alter the parameter values in the RAM of the MOVI-
PLC
®
basic DHP11B.. controller.
Service: Write.request
Slot_Number 0 Random, (is not evaluated)
Index 47 Index of the data set; 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 0x01 Request parameter (PROFIdrive)
2 Axis 0x00 Axis number; 0 = single axis
3 No. of parameters 0x01 1 parameter
4 Attributes 0x10 Access to parameter value
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
0 0
I