Intelligent slaves
51
04/99 AWB 27-1184 GB
Table 10: Syntax for addressing slaves for expanding
remote inputs/outputs
Intelligent slaves When the master and an intelligent slave
communicate with one another, the application
determines which data is exchanged. You cannot
access the input/output operands directly. You must
therefore address the communication data using the
RD/SD syntax.
The table below shows the operands which are
available when the PS4-200 master PLC is operated
with intelligent slaves.
Table 11: Operand addressing of intelligent slaves
RD = Receive Data; defined receive data
SD = Send Data; defined send data
IL program
in ...
Data
flow
Ope-
rand
Data
type
Line Station Module Byte/
word
Bits S 40 syntax
Master Master
↑
Slave 1
I Bit 1 1 1 0 7 LD % I1.1.1.0.7
Master
↑
Slave 2
IBByte1200– LD% IB1.2.0.0
Communication data
Operands Line Station Module Word/byte Bit
RD/SD 0, 1
(0 = master)
1 to 8
(0 = master)
0 to 6 0, 1, 2, ... (byte)
0, 2, 4, ... (word)
0 to 7
RDB/SDB –
RDW/SDW
Status/diagnostic
IS 0, 1
(0 = master)
1 to 8
(0 = master)
0 to 6 0, 1, 2, ... (byte) 0 to 7
ISB
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