6/7/2011 8:46 AM | |
Joined: 7/2/2008 Last visit: 8/26/2024 Posts: 928 Rating:
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Hell Nagul, Just small things to add to what Arethas already said. 1- Make sure you have downloaded all error OBs. 2- The download depends whether you have RAM or EPROM. If you have RAM then just like what is said above. Modify blocks (no interface change) and hit the download button and the modified blocks will be transferred to CPU1 (master or standby) and this CPU will update CPU2 (master or standby) automatically. If you have EPROM (not recommended for frequent program changes), you can do the same but blocks will be downloaded to work memory of both CPUs. This means that at any power failure, the CPU will work with the unchanged blocks loaded in EPROMs. To download your blocks to load memory (EPROM), you have to select the blocks folder and go PLC>Download user program to memory card. To do it without stopping the H-system you have to do the following: 1- CNTRL+I to display the H-status. 2- Stop one of the CPUs 3- Select blocks folder and download user program to memory card. 4- It will ask you whether to make a worm restart or not. Press no. 5- Click switch to CPU with modified configuration. 6- The CPU should go in RUN and the other CPU (with old program) will go to STOP. 7- Download user program to memory card of the stopped CPU. 8- Make a warm restart for the stopped CPU. Both CPUs should be working with same modified program that's downloaded to EPROMs. You will find more info. in S7-400H manual. Best regards. H-H |
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6/7/2011 9:37 AM | |
Posts: 947 Rating:
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in additonal: If you use FEPROM, first download the corrected modul in both CPU, then record the flash card (FEPROM) |
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