Siemens SIPART DR22 Manual page 20

1 Technical Description
1.4 Function principle
1.4.2 Description of the option modules
The process data are read out of the controller in a polling procedure with an update time
300 ms. If the master writes process data to the slave, these become active after a maximum 1
controller cycle.
The description and the controller base file (*.GSD) can be downloaded from Internet under
www.fielddevices.com.
A technical description including the controller base file (*.GSD) is available for creating a mas-
ter-slave linking software for interpreting the identifications and useful data from and to the SI-
PART controller.
The programs SIPART S5 DP and S7 DP are offered for certain hardware configurations.
6DR2803-8C Serial interface RS 232 / RS 485
D Serial interface for RS 232 or RS 485 with electrical isolation
Can be inserted in slot 4.
For connecting the controller SIPART DR22 to a master system for control and monitoring. All
process variables can be sent, the external setpoint, tracking variable, operating modes, param-
eters and configurations sent and received.
The interface traffic can take place as follows:
RS 232 as point-to-point connection
The SIPART bus is no longer available. Therefore please implement multipoint
SIPART Bus
connections via RS 485 or PROFIBUS DP.
RS 485 As a serial data bus with up to 32 users.
The interface module 6DR2803-8C offers electrical isolation between Rxd/Txd and the control-
ler. Switching can be performed between RS 232, SIPART bus and RS 485 with a plug-in
bridge.
A detailed technical description of the telegram traffic is available for creating an interface soft-
ware.
18
Manual
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SIPART DR22 6DR2210
C79000-G7476-C154-03