Sm 338; Pos-Input Addressing; Data Range For The Encoder Values; Input Addresses; Structure Of The Double Data Word In Standard Mode - Siemens SM 338 Reference Manual

1.1.4

SM 338; POS-INPUT Addressing

Data range for the encoder values

The inputs and outputs of the SM 338 are addressed as of the initial module
address. The input and output address is determined at the configuration of the
SM 338 in STEP 7.

Input Addresses

Table 1-2
Encoder input
0
1
2

Structure of the double data word in Standard Mode

For each encoder input the double data word is made up as follows:
31
Freeze
0 = encoder value is not frozen. The value is constantly updated.
1 = encoder value is frozen. The value remains constant until
acknowledgment.
Product Information on the Reference Manual Programmable Logic Controllers S7-300 Module Data Release 3
10
SM 338; POS-INPUT: Input Addresses
Input address (from the configuration) + address offset
"Initial module address"
"Module start address" + 4 bytes address offset
"Module start address" + 8 bytes address offset
24
25 bit sensor value in gray or binary code
0
A5E00409892-01