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CP243-2 AS-i

Created by: Tomy Master at: 12/5/2011 12:07 PM (5 Replies)

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12/5/2011 12:07 PM	Rate (0)
Tomy Master Gold Member Joined: 5/4/2009 Last visit: 5/28/2024 Posts: 914 Rating: (40)	Dear friends, I have referred to the CP243-2 AS-i module, I tried to know what is the maximum number of slaves that can attached to this module but unfortunately i have failed. Please help. Regards. Tomy.
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12/5/2011 12:52 PM	Rate (1)
Marcjan Platinum Expert Joined: 4/22/2010 Last visit: 10/17/2024 Posts: 5697 Rating: (715)	Hello Tomy, 31 in standard addressing mode, 62 in extended adressing mode. More information http://support.automation.siemens.com/WW/view/en/2659515?Datakey=24283631 And http://support.automation.siemens.com/WW/view/en/26250840 Regards, Marcjan
	Last edited by: Marcjan at: 12/5/2011 12:56 PM Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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12/8/2011 12:42 PM	Rate (0)
Oliver Gonzalez Posts: 27 Rating: (0)	Hi! At the beginning the maximun number of slaves in ANY ASI network was 32, but with the new ASI profiles there are A and B slaves, so then you can have 32x2=64. Saying that you can have 64 slaves is not 100% true, since there are slave modules that use A&B as analog input/outputs or 8DI modules; and then the maximum number is reduced. It´s more accurate to say that you can have 32A slaves and 32B slaves, and when any module uses the A and B slave number it uses 2 slaves.
Oliver Gonzalez Posts: 27 Rating: (0)
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12/8/2011 2:22 PM	Rate (1)
Marcjan Platinum Expert Joined: 4/22/2010 Last visit: 10/17/2024 Posts: 5697 Rating: (715)	Hello, The links i provided tell a different story about maximum slaves on 1 master (in case of the CP243) Or do i understand this text wrong? [Quote] The CP 243-2 supports all the functions defined in the extended AS-Interface specification V2.1, which means that dual address assignments (A-B) allow up to 62 digital or 31 analog slaves to be operated on the AS-Interface. Of course you are right about the analog slave using 2 (A+B) adress assignments. Regards, Marcjan
	Problem solved? Please let us know! Please no technical questions by PM, use the forum sections for your questions.
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12/9/2011 2:18 PM	Rate (0)
Oliver Gonzalez Posts: 27 Rating: (0)	Sorry for the mistake! I used my fragile memory to say 32 slaves, the max number is 31, and because the address 0 can´t be used it gives 31 slaves. Although documentation says 31 analog slaves or 64 digital slaves, there are digital slaves that use A+B address too; and it´s more accurate to say from 31 to 64 depending on the slaves in the system as they can be mixed. In the same net you can have digital & analog using A,B or A+B. Thanks for the correction
Oliver Gonzalez Posts: 27 Rating: (0)
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This contribution was helpful to 1 thankful Users Marcjan

12/9/2011 2:40 PM

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Marcjan

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Hello,

Yes, i agree the manual is not completly clear about the amount of slaves.

So thank you for adding that information.

Regards,

Marcjan

Last edited by: Marcjan at: 12/9/2011 2:58 PM

something messed up

Problem solved?
Please let us know!

Please no technical questions by PM, use the forum sections for your questions.

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