Addressing Sm 338 Pos-Input - Siemens SIMATIC Manual

7.4.5

Addressing SM 338 POS-INPUT

Data areas for encoder values
The SM 338 inputs and outputs are addressed beginning at the module start address. The
input and output address is determined in your configuration of SM 338 in
Input addresses
Table 7- 4
Encoder input
Structure of double data word in Standard Mode
Double data word structure of the encoder inputs:
Structure of double data word in Fast Mode
Double data word structure of the encoder inputs:
In the double data word from channel 0, the status of digital input I0 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.
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ
7.4 Position decoder module SM 338; POS-INPUT; (6ES7338-4BC01-0AB0)
SM 338; POS-INPUT: Input addresses
Input address (derived from configuration) + address offset
0 "Module start address"
1 "Module start address" + 4 byte address offset
2 "Module start address" +8 byte address offset
Other signal modules
STEP 7
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