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
63
Procedure for
setting
parameters via
data set 47 Parameter access is provided by the combination of the DP-V1 services write and read .
The master transfers the parameter setting request to the slave by sending Write.req .,
followed by slave-internal processing.
The master now sends a
Read.req to request the parameter setting response. The
master repeats the Read.req if the Read.res from the slave is negative. As soon as
parameter processing is finished in the MOVI-PLC
®
basic DHP11B.. controller (slave),
the controller answers with a positive Read.res . response. The user data now contains
the parameter setting response of the parameter setting request that was previously
sent with
Write.req (
Æ
following figure). This telegram sequence applies to both a C1
and a C2 master.
58380AXX
Write.req DS47 Parameter
Parameter
Parameter
Parameter
Parameter
Read.req DS47
Read.req DS47
Write.res
Read.res(-)
Read.res(+)
with data (parameter request) Request
Response
Response
Request
Processing
without data
without data
without data
without data
with data (parameter response)
Master PROFIBUS-DP-V1 Slave (DHP11B)
0 0
I