Siemens S5-135U/155U System Manual page 324

Digital Input/Output Modules
Using Two or More
You can use up to eight 432 digital input modules with process alarm via
432 Digital Input
IB 0 in one PLC. The modules must all be inserted in the CC or in the same
Modules with EU for error-free acknowledgement of address 0. Each module reserves one
Process Alarm
bit in IB 0. You must set one module to bit 0 on switch row S2; on the other
via IB 0
modules you must remove jumper X3 and set one of the other bits 2 to 8.
The module you have set to bit 0 is known as the master, and the other
modules are slaves. On the master module, you must additionally set the
number of slave modules on switch row S2. Refer to the labeling on the
module cover.
Using the 432
You can also use the 432 digital input module with process alarm together
Digital Input with other alarm-generating modules.
Module with other
Alarm-
To operate the module with process alarm via interrupt, you must observe the
Generating following:
Modules
To operate the module with process alarm via IB 0, you must observe the
following:
8.1.4 Special Features of the DI/DQ 482
The DI/DQ 482 digital input/output module is an I/O module which allows
the processing of process signals in conjunction with the IP 257, with the
S5-135U/155U PLC and the EU 185U (see the IP 257 manual). Described in
the following is the operation of the DI/DQ 482 without IP 257.
The DI/DQ 482 has 32 channels which are jointly isolated, i.e. there is no
subdivision into groups in the module. Channels 0.0 to 0.7 are digital outputs,
Channels 2.0 to 3.7 are digital inputs; Channels 1.0 to 1.7 can be optionally
and individually operated as inputs or outputs.
8-12
f a process alarm is generated via an interrupt, the I/O words of all 432
digital input modules involved in this process alarm must be read in the
alarm-processing OB; with IPs, the process alarms must be acknowledged
(refer to the manuals of the IPs).
The modules must be inserted at interrupt-capable slots (see Chapter 4).
You may use up to eight alarm-generating modules.
The modules must all be inserted in the CC or all in the same EU.
You must operate the 432 module as the master. If you use two or more
432 digital input modules with other alarm-generating modules, you must
operate one 432 as the master and all others as slaves.
System Manual
C79000-G8576-C199-06