As-I Cycle Time - Siemens AS-i Master CM 1243-2 a Manual

Product function
diagnosis via E-mail
•
adapted for AS-i Power24V comment
•
adapted for AS-i Power24V
•
galvanic isolation
•
web-based management
•
Access to analog I/O data
Access to digital I/O data
10.1

AS-i cycle time

Dependency of AS-i cycle time on the number of connected slaves
The AS-i cycle time is calculated using the following formula:
t
cycl
Note
If two AS-i slaves with an extended address area occupy the same address (e.g. address 5A
and address 5B), this slave pair will be calculated as one AS-i slave in the above formula.
This is due to the fact that slave pairs with the same address are only addressed in alternate
cycles. The cycle time in the above formula therefore doubles for such slaves.
Technical data of the data decoupling unit DCM 1271
Bestell-Nr.
product designation
Number of outputs for AS Interface maximum
Number of electrical connections for alarm contact
Type of the connectable conductor cross-section
for AWG conductors for auxiliary contacts
•
for auxiliary contacts
•
– solid
– finely stranded with conductor end processing
Type of display as status display by LED
AS-i master CM 1243-2 and AS-i data decoupling unit DCM 1271 for SIMATIC S7-1200
Manual, 04/2013, A5E02655230010A/RS-AA/003
= (1 + Number of activated AS-i slaves) x 154 μs
Technical data
10.1 AS-i cycle time
3RK7243-2AA30-0XB0
No
All product versions
Yes
Yes
No
via process diagram/peripheral
addresses and data record transfer
via process diagram/peripheral
addresses and data record transfer
3RK7271-1AA30-0AA0
AS-Interface data decoupling unit
1
3
3x (24 ... 16)
3x (0.2 ... 3.3 mm²)
3x (0.2 ... 3.3 mm²)
EFD, ASI OL, DIAG
111