Siemens ISI EN 50295 - Manual (Page 147)

Siemens IK PI · 2004 6/147
AS-Interface
System components and accessories
Addressing units
6
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Overview
Before data transfer can take place with the master, addresses
must be assigned to all stations before the AS-Interface network
is created. This can
• be performed offline using an addressing unit or
• online using a master of the AS-Interface system.
The addresses themselves are the values 1 to 31 (or 1A to 31A
and 1B to 31B for the extended specification). A new slave that
has not yet been addressed has the address 0. It is recognized,
also by the master, as a new slave (not yet addressed) and is not
integrated in the normal communication in this state.
The addresses are assigned as required, i.e. it is of no conse-
quence whether the first slave has the address 21 or whether ad-
dress 1 is assigned to the first slave.
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Function
• Reading out the slave addresses 0 to 31, A/B
• Reading out the I/O and ID-codes of the slaves
• Standard and expanded ID-code 1 and ID-code 2
• Standard and expanded addressing mode according to
AS-Interface Version 2.1
• Programming ID-code 1
• Function testing of slaves: Read inputs and wire outputs of dig-
ital or anlog slaves
• AS-Interface test: Measurement of voltage (measuring range
0 to 35 V) and current consumption (measuring range 0 to
100 mA) of the AS-Interface bus
• Storage: Complete plant configurations can be saved (profiles
of all slaves, also extension in accordance with AS-Interface
specification 2.1)
• Detection of complete system configurations
■
Technical specifications
AS-Interface addressing and diagnostic unit
3RK1 904-2AB01
Power supply The standard power supply is provided by 4 IEC LR6 (NEDA 15)
batteries and guarantees that at least 2,500 addressing operations
can be performed. To save the batteries, automatic switch-off takes
place approx. 1 min. after the last button operation.
Ambient conditions
• Operating temperature range in °C 0 to +55
• Storage temperature range in °C -20 to +55 (without batteries)
• Relative humidity in % Max. 75, condensation must be prevented
• Height above sea level in m Up to 2,000
• Installation site Indoors only
Mechanical design
• Degree of protection
- Units IP50
- Connection sockets IP20
• Dimensions in mm 84 x 195 x 35
• Connection via M12 socket