SIEMENS
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Siemens IK PI · 2015
AS-Interface
Network transitions
DP/AS-i F-Link
4
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Benefits
•
Gaps in (bus-based) safety technology closed: safety-related
signals (EMERGENCY-STOP, door interlock, light curtains
etc.) collected with AS-i and transferred to higher-level F-PLC.
This enables:
- Quick installation, easy commissioning: benefits of AS-i can
now be systematically leveraged in the field for Safety
Integrated.
-
Cost-effective solution as ASIsafe is ideally suited for the col-
lection of "fewer but more distributed fail-safe bits"
•
Price advantage: As a fully fledged AS-i master according to
Specification V3.0, more inputs and outputs can be used, e.g.:
-
Up to 248 DI/248 DO when using 62 A/B slaves with 4DI/4DO
each
- Up to 62 digital or analog slaves
•
Investment protection:
- Connection to PROFIBUS networks, such as DP/AS-i LINK
Advanced or DP/AS-Interface Link 20E
- Downward compatibility to AS-Interface Specification V2
- Open for modern automation concepts with AS-i
•
Teaching the code sequences of ASIsafe slaves is possible at
the press of a button
•
Reduced amount of engineering work thanks to user-friendly
configuration of all AS-i slaves from Siemens using the slave
selection dialog in HW-Config (STEP 7), including setting the
F-parameter of the ASIsafe slaves modeled on PROFIsafe
slaves
•
Cost-savings thanks to programming of the safety logic
with the familiar, powerful commands of the distributed safety
packages from the fail-safe SIMATIC PLC in F-FBD or F-LAD,
incl. TÜV-certified function blocks for typical safety applica-
tions
•
Use in machine tools under SINUMERIK 840 D (pI/sl) possible
•
Reduction of standstill and servicing times in the event of a
slave failure thanks to user-friendly diagnostics using the
display and through simple module exchange (only a few
settings by control keys are required, without use of the con-
figuring tool)
■
Application
Links between PROFIsafe and ASIsafe
The DP/AS-i F-Link is a PROFIBUS DP-V1 slave (according to
IEC 61158 and IEC 61784) and an AS-Interface master (based
on
AS-Interface Specification V3.0 according to IEC 62026-2).
It enables transparent data access to AS-Interface from
PROFIBUS DP. The DP/AS-i F-Link is also an AS-i master with
which safety-related input data can be passed from ASIsafe
slaves via the PROFIsafe protocol to a fail-safe CPU with
PROFIBUS DP master. No additional safety cabling or monitor-
ing is required (in particular no MSS ASIsafe Modular Safety
System).
The transmission of binary values or analog values is possible
depending on the slave type. All slaves according to
AS-Interface Specification V2.0, V2.1 or V3.0 can be used as
AS-i slaves.
PROFIBUS DP masters according to DP-V0 or DP-V1 can
exchange I/O data with lower-level AS-i slaves in cyclic mode.
PROFIBUS DP masters with acyclic services according to DP-V1
are able in addition to initiate AS-i command calls (e.g. read-
ing/writing the AS-i configuration during normal operation).
In addition to digital I/O data, analog data can also be saved
with high performance in the cyclic I/O of a fail-safe S7-300/
S7-416 F-CPU.
In configuring mode the DP/AS-i F-Link reads in the configura-
tion data of the peripherals on the AS-Interface. Slave addresses
can be set using the display and the control keys, and the code
sequences of safe AS-i slaves can be taught.
During operation, four display LEDs and the display provide
detailed diagnostics information, which directly localizes
the fault if required. Using the PLC user program it is possible
to read out diagnostics data records and make them available
to a higher-level operating and monitoring system (e. g.
WinCC Flexible or TRANSLINE HMI).
© Siemens AG 2014