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Configuring Hardware and Communication Connections STEP 7.pdf

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Functionality: Option H<strong>and</strong>ling During Operation<br />

<strong>Configuring</strong> the Distributed I/O (DP)<br />

• Option h<strong>and</strong>ling is enabled for a slot:<br />

The slot may have the RESERVE submodule (option) or the configured<br />

electronic submodule inserted in it. If another submodule is detected in this slot,<br />

a diagnostic message is triggered (no submodule, incorrect submodule).<br />

• Option h<strong>and</strong>ling is disabled for a slot:<br />

The slot may only have the configured electronic submodule inserted in it. If<br />

another submodule is detected in this slot, a diagnostic message is triggered<br />

(no submodule, incorrect submodule).<br />

Substitute Values for the RESERVE submodule<br />

Substitute value for digital inputs: 0<br />

Substitute value for analog inputs: 0x7FFF<br />

Modifying <strong>and</strong> Evaluating in the User Program<br />

The ET 200S has a control <strong>and</strong> feedback interface for the "option h<strong>and</strong>ling"<br />

function.<br />

The modifying interface is in the process image output table (PIQ). Each bit in this<br />

address area modifies one of the slots 2 to 63:<br />

• Bit value = 0: The option h<strong>and</strong>ling parameters apply. RESERVE submodules<br />

are permitted.<br />

• Bit value = 1: The option h<strong>and</strong>ling parameters do not apply. RESERVE<br />

submodules are not accepted in this slot:<br />

The feedback interface is in the process image input table (PII). Each bit in this<br />

address area provides information about what submodule is actually inserted in<br />

slots 2 to 63:<br />

• Bit value = 0: The slot contains the RESERVE submodule, an incorrect<br />

submodule or no submodule (submodule removed).<br />

• Bit value = 1: The slot contains the configured submodule.<br />

The addresses of these interfaces are reserved as soon as option h<strong>and</strong>ling is<br />

enabled in the power submodule ("Addresses" tab).<br />

Please note that the option h<strong>and</strong>ling function must also be enabled in the DP slave<br />

(interface module IM 151-1 STANDARD). If it is not enabled, the address reserved<br />

for the control <strong>and</strong> feedback interface will be released again! Repeated enabling<br />

<strong>and</strong> disabling of option h<strong>and</strong>ling may change the address of the control <strong>and</strong><br />

feedback interface.<br />

For more information on the assignment <strong>and</strong> meaning the bytes in the process<br />

image, see the ET 200S Distributed I/O manual.<br />

<strong>Configuring</strong> <strong>Hardware</strong> <strong>and</strong> <strong>Communication</strong> <strong>Connections</strong> with <strong>STEP</strong> 7<br />

A5E00706939-01 3-21

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