Siemens S5-135U/155U Special Features of the DI/DQ, Using Two or More, Modules with, Module cover

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

Digital Input Module with other Alarm- Generating Modules

You can also use the 432 digital input module with process alarm together with other alarm-generating modules.

To operate the module with process alarm via interrupt, you must observe the following:

Sf 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).

SThe modules must be inserted at interrupt-capable slots (see Chapter 4).

To operate the module with process alarm via IB 0, you must observe the following:

SYou may use up to eight alarm-generating modules.

SThe modules must all be inserted in the CC or all in the same EU.

SYou 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.

8.1.4Special 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	System Manual
	C79000-G8576-C199-06