Slot 0 of the frame 0: Power Electric.
As standard, it occupies the first location. A supply module of the s7-300 series is not necessarily mandatory, it is possible to use a 24 vdc voltage supplied by another power supply. Slot 2 to 31: slot 2 is the first available slot for i / o modules (sm), communications processors (cp) or function modules (fm).
BIT ADDRESSING FOR S7-1500 IN TIA PORTAL
BYTE ADDRESSING FOR S7-1500 IN TIA PORTAL
The bit address is separated from the byte address by a dot. Thus, each input and each output is uniquely identified by its byte address and its bit
4 byte addresses are reserved for each location. When using 16-channel digital input / output modules, 2 byte addresses are lost per slot.
TABLE OF VARIABLES IN TIA PORTAL
Double-click on: "show all variables"
1) the symbolic identifiers seize the "name" column
2) the physical addresses in the "address"
CROSS REFERENCE IN TIA PORTAL
These are the addressing details for Siemens S7 1500 PLC programming, I Hope you have enjoyed and learned addressing concept from here. Comment below your suggestion or question if any.