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6
PROFIBUS-DP-V1 Functions
Structure of the DP-V1 parameter channel
64
Manual – MOVI-PLC
®
basic DHP11B.. controller
DP-V1 master
processing
sequence
If the bus cycles are very short, the request for the parameter setting response arrives
before the MOVI-PLC
®
basic
DHP11B.. controller has concluded parameter access in
the device. This means that the response data from the MOVI-PLC
®
basic
DHP11B..
controller is not available yet. In this case, the MOVI-PLC
®
basic
DHP11B.. controller
sends a negative answer with the
Error_Code 1 = 0xB5 (status conflict)
to the DP-V1
level. The DP-V1 master then sends another request with the above-mentioned
Read.req header
until it receives a positive response from the MOVI-PLC
®
basic
DHP11B.. controller.
MOVILINK
®
parameter
requests
The MOVILINK
®
parameter channel of the MOVI-PLC
®
basic
DHP11B.. controller 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 telegram sequence for data set 47 is used.
Request ID:
0x40 SEW MOVILINK
®
service
The actual service is defined by the data set element
Attribute
on the MOVILINK
®
parameter channel. The high nibble of this element corresponds to the service nibble in
the management byte of the DP parameter channel.
53127AXX
Send Write.request
with Parameterdata
Send DS_Read.req
with Parameterdata
Check Write.
response
Write.response
negative
Write.response
positive
Parameter transfer
aborted with ERROR
Read.
response
State
Conflict?
Other Errors
or Timeout
yes
no
yes
no
Parameter transfer
ok, data available
0
0
I
Содержание MOVI-PLC basic DHP11B-T0
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