Datalogic Controller SC6000, Руководство по установке

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1 INTRODUCTION
1.1 OVERVIEW
The REDS function replicates the SC6000 controller, the presence sensor and the encoder
devices. The scanner network is not replicated as it already implements a form of redundancy.
1.2 BASIC CONCEPTS
REDS is based on the following:
•
The redundant station can be logically seen as the combination of two separate stand-alone
stations connected through a “redundancy cable” (Lo serial). The redundancy cable
connects the two Lonworks network halves and allows controller-to-controller communication
to exchange data that will be used to supervise and manage the role the controllers play in the
system.
•
The companion controllers run the same software and configuration, except for one parameter
that assigns their topology role (Working/Protecting).
•
The supported operating mode is “PackTrack”.
•
The scanner network is fully managed by the Active controller. At initialization time the
scanners are informed about which controller they have to communicated with.
•
Both the controllers distribute their own encoder to all the controlled scanners, however the
scanners only use the encoder from the Active controller and send their data only to it.
•
The scanner replacement is always managed by the Active controller.
1.3 SYSTEM COMPONENTS
1.3.1 Controller
Two controllers are present in the Lonworks network. One of them acts as an Active unit and the
other as a Standby. In the event of failure, of either the active unit or of its local resources
(presence sensor, encoder), or of Parcel error count conditions, a Standby-Active “switch over” is
performed that guarantees system service after a short off-duty interval.
1.3.2 Lonworks Network
A single Lonworks network (split into two halves) is present that interconnects all the scanners to
both the controllers. The network is fully managed by the active controller.