S7 Digital In's Outs ANALOG In Out Address

[Guest jimmy]

New to Siemens S7-400. Need to know from Siemens experts what the standard addressing is for the Digital Inputs/Outputs. Analog Inputs/ Outputs. Internal Relay coils. Does anyone also know of any website that may have down-loadable Autocad Symbols that show the rack/ or Modules of the inputs/output/ or processor or powersuply. Thanks and any help is appreciated!

[Guest Joe Bloggs]

When you use Simatic software to configure your plc rack, it automatically assigns addresses to the various I/O as you place them. It allocates 4 bytes per slot for digital modules. A 16 way input module in the first slot will be I0.0-I0.7, I1.0-I1.7. Second slot would be I4.0-I4.7, I5.0-I5.7. Note that 2.0-2.7, 3.0-3.7, 6.0-6.7 and 7.0-7.7 are reserved in case you change them to 32 way modules in future. Outputs work exactly the same, so a 16 way output module in the third slot would then be Q8.0-Q8.7, Q9.0-Q9.7 with 10.0-10.7 and 11.0-11,7 reserved. Analogue modules take up peripheral word addresses. They are put in an address range way above the digital range and do not relate to slot positions. Example of 8 way analogue module could be PIW575-PIW582. 8 way analogue output might be PQW591-PQW598. All of these addresses may be changed manually (as long as they don't overlap now or in future). You really need to open S7 software and go into the hardware configuration screen to see them all. Hope that helps.

[Guest Joe Bloggs]

Internal relay coils can be either M0.0-M0.7, M1.0-M1.7, etc etc. or can be created in the form of a data block as boolean types. An example for data block 10 could be DB10.DBX0.0-0.7, 1.0-1.7, etc etc. The M addresses can be set as non-volatile or volatile (battery backed or not) in cpu module properties, with the non-volatile range starting from 0.0 up to the no. of bytes you set. Not sure about CAD templates as we just draw our own.

[Chris Elston]

Jimmy, You can download this AutoCad toolbar addon: http://forums.mrplc.com/index.php?act=Downl...&CODE=02&id=146 It has an Allen Bradley RACK, but you can use Text Edit to change the AB addresses to Siemens.