User Data Via Profibus - Siemens 6DR55 Series Manual

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5.3.2 User data via PROFIBUS

German English name Abbreviation
name
Sollwert Setpoint
Istwert Readback
Diskrete Pos- Position dis-
tion crete
Aktorzustand Checkback
Fernkaskade Remote Ca-
Eingang scade Input
Fernkaskade Remote Ca-
Ausgang scade Output
Setpoint
Readback
Position discrete
SIPART PS2 PA Manual
A5E00127926--05
In this example all fies supported by the device are transmitted in the
input or output direction. 256 (W#16#100) is selected as the initial I/O
address.
Byte 15
15 bytes of input data consisting of the following:
READBACK
RCAS_OUT
CHECKBACK 3 Byte
POS_D
Byte 10
10 bytes of output data consisting of the following:
SP
RCAS_IN
The positioner can exchange a combination of the following cyclic
useful data with the PROFIBUS.
SP
RB
POS_D
CB
RCAS_IN
RCAS_OUT
The setpoint consists of a floating--point value (4 bytes and the
associated status (1 byte, see below).
The readback indicates the position of the valve. The readback
consists of a floating--point value (4 bytes) and the associated status (1
byte).
The discrete position of the valve is displayed as a value (1 byte) with
the following meaning:
0 = not initialized
1 = valve closed
2 = valve open
3 = valve in intermediate state
There is a status for this value too (1 byte)
Functions/operation via PROFIBUS PA
5 Byte
5 Byte
2 Byte
5 Byte
5 Byte
Direction Length in
from the Byte
point of view
of the posi-
tioner
Input 5
Output 5
Input 2
Input 3
Input 5
Input 5
Consisting of
Value/Status
Value/Status
Value/Status
Value
Value/Status
Value/Status
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