Specifications
AS-Interface
ASIsafe
Introduction
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Siemens IK PI · 2012
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Overview (continued)
Function
Like the standard stations, the safe stations send their informa-
tion to the master after master calls.
The safety monitor monitors this transmission from the safe sta-
tions to the master and switches to the safe state or sends a dis-
connect signal to one or more distributed safe AS-i outputs
which switch in turn to the safe state.
The safety monitor provides OR logic, AND logic, timer func-
tions, buffer storage, etc.
Software
With the ASIMON configuration software you can configure
safety-oriented applications and transfer them into the monitor.
The configuration comprises the input signals of the safe sta-
tions and the internal functions of the safety monitor.
The software also enables online diagnostics.
Integration
The existing infrastructure such as the master and the power
supply unit can be used as before for integrating the safety sys-
tems in AS-Interface. For the safety systems the safety monitor
is integrated as monitoring element and the safe stations as in-
terface between the safe sensors and the system. The safe sen-
sors can be used as before.
A detailed diagnosis of all parameterized modules of the safety
monitor can be obtained using the PLC. The STEP 7 function
blocks for the S7-200 and S7-300/400 are available on the inter-
net at
http://support.automation.siemens.com/WW/view/en/25239870/130000
In addition an AS-i address should be set for the safety monitor
via the configuration software. Evaluation is performed by
means of function blocks in the PLC. With the aid of prefabri-
cated WinCC flexible function units this evaluation can be visu-
alized across the system on the existing SIMATIC HMI devices.
Diagnostics interface for ASIsafe components via S7-200 or S7-300
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Benefits
• No failsafe PLC or special master is required for the ASIsafe
Solution local (safety monitor)
• Alternatively integration in SIMATIC / SINUMERIK safety
architectures with the aid of DP/AS-i F-Link (ASIsafe Solution
PROFIsafe)
• Simple system structure thanks to standardized AS-Interface
technique
• Safety-related and standard data on the same bus
• Existing systems can be expanded quickly and easily
• Optimum integration in TIA (Safety Diagnostics) and Safety
Integrated
• Safe signals can be combined in groups
• Inclusion of the safety signals in the plant diagnostics, also on
existing HMI panels
• Approved to Category 4 according to EN 954-1 or PL e ac-
cording to EN ISO 13849-1 or SIL 3 according to IEC 61508
• ASIsafe is certified by TÜV (Germany), NRTL (USA) and INRS
(France)
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Application
Integrated safety technology in the AS-Interface system is used
wherever EMERGENCY-STOP pushbuttons, protective door in-
terlocks, stop Category 0 and 1, two-hand operator controls and
light arrays now installed.
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More information
More information and circuit examples for safety systems with
AS-Interface Safety Monitor and DP/AS-i F-Link can be found on
the Internet at
http://support.automation.siemens.com/WW/view/en/24509484
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© Siemens AG 2011