124 lines
6.6 KiB
HTML
124 lines
6.6 KiB
HTML
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<meta name="abstract" content="You should be aware of the considerations when using 3270 emulation." />
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<title>3270 full-screen considerations</title>
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<body id="rzaiwothr3270con"><a name="rzaiwothr3270con"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">3270 full-screen considerations</h1>
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<div><p>You should be aware of the considerations when using 3270 emulation.</p>
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<p>When using 3270 full-screen mode for your Telnet client, you should be
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aware of the following considerations:</p>
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<ul><li>3270 screen size</li>
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<li>The 3270 cursor select key</li>
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<li>3270 error messages</li>
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<li>3270 null characters</li>
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</ul>
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<div class="section"><h4 class="sectiontitle">TN3270 screen size</h4><p>Telnet 3270 full-screen mode
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requirements:</p>
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<ul><li>If the negotiated 3270 device type requires 1920 characters, the iSeries™ Telnet
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client code will run with any 5250 device type as the client terminal.</li>
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<li>If the negotiated 3270 device type requires 3564 characters, the iSeries Telnet
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client code requires either a 3180 Model 2, 3197 Model D1, D2, W1, W2, or
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3477 Model FA, FC, FD, FE, FG, or FW 5250 device type as the client terminal.</li>
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<li>There is a 27x132 display when a 3180 Model 2, 3197 Mode D1, D2, W1, W2
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or 3477 Model FA, FC, FD, FE, FG or FW device type is negotiated. In previous
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releases, a data area was needed to get this support.</li>
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<li>To get a 24x80 display, execute the command CRTDTAARA DTAARA(libname/QTVNO32785)
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TYPE(*CHAR) VALUE('1').</li>
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</ul>
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</div>
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<div class="section"><h4 class="sectiontitle">TN3270 cursor select key</h4><p>The existing Cursor Select
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key is disabled if you choose to emulate the Cursor Select key. Specifying
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one of the following parameters for the STRTCPTELN command emulates the Cursor
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Select key:</p>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" frame="border" border="1" rules="all"><caption>Table 1. Specifying parameters to emulate the cursor select
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key</caption><thead align="left"><tr><th valign="top" id="d0e59">Parameter</th>
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<th valign="top" id="d0e61">Value</th>
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</tr>
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</thead>
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<tbody><tr><td valign="top" headers="d0e59 ">Page Up (Roll Down) key</td>
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<td valign="top" headers="d0e61 ">*CSRSLT</td>
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</tr>
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<tr><td valign="top" headers="d0e59 ">Page Down (Roll Up) key</td>
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<td valign="top" headers="d0e61 ">*CSRSLT</td>
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</tr>
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<tr><td valign="top" headers="d0e59 ">Cursor Select key</td>
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<td valign="top" headers="d0e61 ">*F-key (specify a function key *F1 to *F24)</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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<div class="section"><h4 class="sectiontitle">TN3270 messages</h4><p>When you are using Telnet 3270 full-screen
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mode, several types of error messages might display.</p>
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<ul><li>Key entry errors appear as flashing 4-digit numbers on the lower left
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corner of the display. Press the Help key or F1 (Help) to obtain more information
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about the message. See the System Operation book if you cannot correct the
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error.</li>
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<li>System messages include Telnet messages and are issued from the iSeries server.</li>
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<li>For information about messages that are sent from the remote system, see
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the remote system documentation.</li>
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</ul>
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</div>
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<div class="section"><h4 class="sectiontitle">TN3270- Handling null characters</h4><p>When a 3270 display
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station sends a data stream, all null characters are removed. Specify one
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of the following values for the handle nulls (NULLS) parameter on the STRTCPTELN
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command:</p>
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<p><strong>*REMOVE</strong></p>
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<p>Removes beginning and embedded null characters</p>
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<p><strong>*BLANK</strong></p>
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<p>The
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default value; changes beginning and embedded null characters to blanks Trailing
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null characters are always removed for both values. For example, assume the
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data consists of the following (0 indicates a null):</p>
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<pre>0x0yz000 </pre>
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<p>The data stream sent from a 5250 display station that runs
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Telnet 3270 full-screen with the default *BLANK contains the
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following code:</p>
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<pre>bxbyz</pre>
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<p>The data stream sent from a 3270 display station or from a
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5250 display station running a Telnet 3270 full-screen session when the value
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*REMOVE is specified would contain the following code:</p>
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<pre>xyz </pre>
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<p>The value *REMOVE is valid for the following devices:</p>
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<ul><li>Any locally attached display</li>
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<li>Displays attached to a remote 5394 controller</li>
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<li>Personal computer displays using the workstation function</li>
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</ul>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaiwmanage3270.htm" title="3270 Telnet client sessions provide information on using this emulation type to sign on and use applications on a remote system that has a Telnet server application. This section also provides more information on 3270 emulation.">3270 Telnet client sessions</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rzaiwstrt3270session.htm" title="This topic explains how you can start a Telnet client session using 3270 emulation.">Start a 3270 Telnet client session</a></div>
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</div>
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</div>
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