Siemens SIMATIC NET DP/AS-i Link 20E Manual page 132

AS-Interface Protocol Implementation Conformance Statement (PICS)
Table A-2 PICS, (continued)
No. Function or call on the host interface
(symbolic representation)
4 Support of Combined transaction type 2
integrated
5 Support of Combined transaction type 3
integrated
6 Support of Combined transaction type 4
integrated
7 Support of Combined transaction type 5
integrated
How the AS-i cycle time depends on the number of connected slaves
The AS-i cycle time can be calculated using the following formula:
= (1 + number of activated AS-i slaves) x 156 ms
t
cycl
Note:
If two AS-i slaves with extended addressing mode occupy the same address (for
example, address 5A and address 5B), this slave pair is calculated as one AS-i
slave in the above formula. The reason for this is that slave pairs with the same
address are addressed only in every second cycle. The cycle time in the formula
above is therefore doubled for such slaves.
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M4 Implementation of the function by ... /
Notes
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DP/AS-Interface Link 20E
Release 08/2008
C79000-G8976-C235−01