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Communication Modes
2.1
PLC-PLC Connection
Introduction
Message Length
Parameter
Assignment
Address
Conversion
Address Range
2-2
The PLC-PLC connection serves for message-oriented communication be-
tween two programmable controllers, without a detour via an additional sta-
tion.
Each message of the non-safety-related PLC-PLC connection can contain up
to 64 bytes of data.
If you install a PLC-PLC connection, you must parameterize the CP 541 as
an active station.
The node address specified in the programmable controller is converted by
the CP 541 to the station number and vice versa. Node address 1 is converted
to station number 1, node address 2 to station number 2, etc.
PLC
Figure 2-1 Address Conversion for PLC-PLC Connection
Node addresses 1 to 30 are available in the connected programmable control-
ler for the PLC-PLC connection.
SINEC L2
CP
541
1
2
3
30
Communications Processor CP 541
1
2
3
30
EWA 4NEB 812 6188-02
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