Siemens SIMATIC Distributed I/O System DP/ASi Link, Руководство пользователя

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Glossary-1
Distributed I/O System DP/ASi Link
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Glossary
A
Active nodes may send data to other nodes, if they are token holding nodes,
and request data from other nodes (synonymous with master).
By actual configuration we mean the true configuration of the ASi as de-
tected by the DP/ASi link.
ActuatorSensor Interface. The Actuator Sensor Interface is a networking
system for the lowest range of automation levels It is suitable for networking
binary actuators and sensors.
The ASi address uniquely identifies every ASi slave within the ASi. The ASi
master addresses an ASi slave by means of its ASi address.
ASi address 0 has a special meaning in the ASi:
It is the default address with which every ASi slave is supplied ex works.
It is required to assign a new address to an ASi slave.
The ASi cable is a specially shaped two-wire cable incorporating reverse po-
larity protection and connecting
³
ASi slaves and the
³
ASi master for
transmitting information and auxiliary power.
ASi configuration data contain the
³
I/O code and the
³
ID code of an ASi
slave. They characterize the characteristics of the ASi slave.
³
Master. The ASi master is the control and monitoring unit that monitors
and coordinates data transmission from and to the ASi slaves.
³
Slave. ASi slaves are the interfaces between the higher-level ASi master
and the connected actuators and sensors. ASi slaves transmit data to the ASi
master only upon the latter’s specific request.
Active nodes
Actual
configuration
ASi
ASi address
ASi address 0
ASi cable
ASi configuration
data
ASi master
ASi slave