5/27/2014 10:08 AM | |
Joined: 7/2/2008 Last visit: 9/30/2024 Posts: 928 Rating: (308) |
Hello Everyone, I would like to share my experiencewith youso that no one would make the same mistake again. Recently we had a very small project with S7-312 CPU and less than 50 I/Os. We thought we might give the customer a STEP7 lite. And here's what we found, 1- As explained earlier. No Windows 7 (Virtual machine is a must). 2- IO addressing in STEP7 lite is a fixed pattern. Do not start you HW config in SIMATIC Manager thinking you can do the same in STEP7 Lite. [quote user="Programming with STEP 7 Lite V3.0"]5.2.3.8 Assigning I/O Addresses STEP 7 Lite assigns input and output addresses when modules are placed in the configuration table. This means every module has a start address (address of the first channel); the addresses for the remaining channels are based on this start address.These addresses cannot be modified; each slot has a set assigned start address: Slot 4: address 0 (digital module) or address 256 (analog module) Slot 5: address 4 (digital module) or address 272 (analog module) Etc... 3- Finally you won't find any CPU or IO module released after thelast STEP7 lite update in 17/11/2009and you can't update HW catalog. Finally I do not advise anyone to use this STEP7 lite as a development tool. It can't be used anymore outside universities' labs. Best regards, H-H
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