Technical data

11 Data Transmission with Distributed I/Os
With the distributed I/Os system SINEC L2-DP, you can use a large number
of distributed I/O modules and field devices in close proximity to the
process.
Distributed means that there can be large distances between your
programmable controller and the I/O and field devices which can be bridged
by a field bus or (twisted pair or fiber optic).
This chapter describes the functions of the DP from the point of view of the
CPU control program.
Data exchange with distributed I/Os (DP) is handled via the I/O area of the
SIMATIC PLC:
– In the control program, the data for transmission are assigned to
the output area of the I/Os.
– The received data are stored in the input area of the I/Os.
All I/O bytes via which you want to send data and all I/O bytes via which
you want to receive data must be marked as DP. You do this by configuring
the I/O areas in COM 5430 TF/COM 5431 FMS (see Section 11.6.1).
This chapter describes the following:
➣ How data transmission with DP functions.
➣ Configuring the data exchange with the connected DP slaves.
➣ Diagnostics using the control program.
B8976060/02 Distributed I/Os (DP)
11 - 1 Volume 1