Execution Of Switching Operations Via Profibus-Dp; Command Output Modes - Siemens SIPROTEC4 7SJ61 Manual

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Execution of switching operations via PROFIBUS-DP

Execution of switching
operations via PROFIBUS-DP
2.1

Command output modes

Double commands
Single commands
Commands with
continuous output
7SJ61/62/63, 6MD63, 7UM61 PROFIBUS-DP – Communication profile
C53000-L1840-B001-02
The following types of commands are available in the SIPROTEC
device:
Execution of the double commands, output to the switching devices and
checkback signal are processed through two outputs respectively two
bits, which are defined by "01" = OFF and "10" = ON.
Execution of the single commands, output to the switching devices and
checkback signal are processed by one output respectively one bit,
which is defined by "0" = OFF and "1" = ON.
Note
In deviation to the above-written definition, control of the single and
double commands in the SIPROTEC device via PROFIBUS-DP is
processed identically via two bits of the PROFIBUS-DP output
message.
A command output in the SIPROTEC device can be executed as conti-
nuous output or pulse output.
Commands in the operation mode continuous output are executed
(controlled), if in the corresponding pair of bits a value changeover (a
slope) is recognized via PROFIBUS-DP from "quiescent status" or OFF
to ON and they remain active until a new value changeover occurs from
"quiescent status" or ON to OFF via PROFIBUS-DP.
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