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11/17/2010 9:48 PM | |
Joined: 7/2/2008 Last visit: 8/26/2024 Posts: 928 Rating: (308)
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Hello ROCLIM, The S7-300 PLCs do not support changing configuration in RUN mode. To download modifications of hardware configuration, the CPU must go STOP. However, if you have software redundancy based on S7-300, you can modify hardware configuration without stopping the SYSTEM (i.e Stopping one CPU at a time). The required hardware is generally 2 S7-300 CPUs with DP interfaces and DP slaves of ET200M. You can read more in software redundancy manual. However and for your information, modifying hardware configuration without stopping the CPU is only possible in S7-400 with something called CIR: In this case you need anS7-400 CPU with any kind of Profibus slaves. The hardware configuration should be configured with specialelementsthatgive the CPU the ability to tolerate time delays while downloading the new hardware configuration. You can read more in CIR manual. Best regards, H-H |
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7/29/2014 12:48 AM | |
Joined: 1/17/2006 Last visit: 8/18/2024 Posts: 553 Rating: (29) |
I have doubt if is it possible to insert DI/DO, AI/AO or CP modules in the same rack of the CPU S7-4xx instead of inserting in DP network as a CiR-module ? regards. |
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