SEW-Eurodrive DFP21B User Manual

72
Manual – DFP21B PROFIBUSDP-V1 Fieldbus Interface
7
Structure of the DP-V1 parameter channel
PROFIBUSDP-V1 Functions
7.3.5 PROFIdrive parameter requests
The PROFIdrive parameter channel of SEW drive inverters 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 telegram sequence for data set
47 is used. PROFIdrive only defines the following 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
according to
PROFIdrive
The following tables show an example of the structure of the WRITE.request and
READ.resuser data for reading an individual parameter via the MOVILINK
®
parameter
channel.
Sending parameter request
The table shows the coding of the user data for the WRITE.reqservice specifying the
DP-V1 header. The WRITE.req service is used to transfer the parameter setting request
to the drive inverter.
The request ID = 0x02 = Change parameter (PROFIdrive) results in remanent write
access to the selected parameter. Consequently, the internal flash/EEPROM of the
inverter is written with each write access. Use the MOVILINK
®
service "WRITE Param-
eter volatile" if parameters must be written cyclically at short intervals. With this service,
you only alter the parameter values in the RAM of the inverter.
Table 13: WRITE.request header for transferring the parameter request
Service: WRITE.request Description
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
Table 14: WRITE.req USER DATA for PROFIdrive "Request parameter"
Byte Field Value Description
0 Request reference 0x01 Individual reference number for the parameter
setting request, 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
00
I

SEW-Eurodrive DFP21B Specifications

General

Brand	SEW-Eurodrive
Model	DFP21B
Category	Recording Equipment
Language	English