Siemens Simatic S7-300 - Page 397

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7.4 Position decoder module SM 338; POS-INPUT; (6ES7338-4BC01-0AB0)
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
7-17
Structure of double data word in Standard Mode
Double data word structure of the encoder inputs:
 
(QFRGHUYDOXHLQJUD\RUELQDU\FRGH
 (QFRGHUYDOXHLVQRWIUR]HQ7KHYDOXHLVFRQWLQXRXVO\XSGDWHG
 (QFRGHUYDOXHLVIUR]HQ7KHYDOXHUHPDLQVFRQVWDQWXQWLODFNQRZOHGJHPHQW
)UHH]H
Structure of double data word in Fast Mode
Double data word structure of the encoder inputs:
 
ELWHQFRGHUYDOXHLQJUD\RUELQDU\FRGH
'LJLWDOLQSXWVWDWXV
 JURXSHUURUHQFRGHUHUURUHUURUHWFDX[YROWDJH
 SDUDPHWHUL]DWLRQHUURU
 RSHUDWLRQDOFKHFNEDFNYDOXHVDUHYDOLG
In the double data word from channel 0, the status of digital input IO is reported to bit 27
(digital input status) and the double data word from channel 1 is reported to digital input I1. In
the double data word from channel 2, the bit is always = 0.
Output address in Standard Mode

%LW (QFRGHULQSXW
%LW (QFRGHULQSXW
%LW (QFRGHULQSXW
$FNQRZOHGJHPHQWRIIUHH]HIXQFWLRQ
0RGXOHVWDUWDGGUHVV
No output data are supported in Fast Mode.