
51
06/99 AWB 2700-1364 GB
5
Slave Addressing
Slaves without CPU
The master and slaves without a CPU communicate
using either the Suconet K or K1 protocol. The
master selects the protocol automatically according
to the capabilities of the slaves. It is not necessary to
set the receive or send data length in the topology
configurator. Suconet K/K1 selects the appropriate
message length and automatically addresses the
relevant data areas in your application.
As a result, remote I/O operands can be accessed in
the same way as local I/O operands.
The general syntax rule for the addressing of I/O
operands is:
Operand data type-Line-Station-Module-Byte-Bit
If the PS 4-271 is used as a master, the following
slave operands can be addressed using the values
specified in the table:
Table 5: Operand addressing of slaves without CPU
I
= input; Q = output,
IS = status/diagnostics,
IA = analog input, QA = analog output
Operand
Line
Station
Module
Word/Byte
Bit
I/Q/IS
1 to 3
(0 = master)
1 to 8 (line 1, 2, 3)
(0 = master)
1 to 5 (local expansions of
the master)
(0 = master basic unit)
1 to 6 (local expansions of
slaves)
(0 = slave basic unit)
0, 1, 2, ...
0 to 7
IB/QB/
IAB/QAB/
ISB
–
IW/QW/
IAW/QAW
0, 2, 4, ...
–
ID/QD
0, 4, 8, ...
–
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