Operation - Siemens S5-135U/155U System Manual

Monitoring Module

10.3 Operation

Switch S1 (Read)
The addresses set at these switches are acknowledged by the monitoring
and S2 (Write) module with RDY/ and are therefore not to be used again for inputs and
outputs in this programmable controller (double addressing is not allowed).
Switch S3 (Listen)
No acknowledgement signal (RDY/) is returned by the monitoring module to
and S4 (Listen)
the addresses set the switches S3 and S4. These addresses must be accessed
by the programmable controller as input or output addresses. This means that
they must be occupied by I/O modules or by one monitoring module at
switches S1 and S2. These modules must have been inserted into the last
expansion unit.
To achieve optimum address bus monitoring, inverse addresses should be
used [e.g. 85 (55H)
setting of switches S3 and S4 is the same on all monitoring modules used.
The setting of switches S1and S2 as well S3 and S4 should be the same on
the monitoring module in the last expansion unit.
1)
Select addresses 213 (D5H) and 170 (AAH) when using the module in the S5-115U.
For exceptions refer to page 10 - 13.
10-8
2)
and 170 (AAH)]. It is advisable to make sure that the
Input address
Switch can be accessed
using MEMR/
(READ)
S1 *
S2
S3 *
S4 *
Output address can be ac-
cessed using MEMW/
(WRITE)
*
*
*
C79000-G8576-C199-06
Acknowl-
edged by
module with
RDY/
*
*
System Manual