Integration Guide

Table Of Contents

Software Description

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WaveWorks PSS, Integration Guide, 1.10 Page 77

Entrances

There are two types of entrance stations: serial and RF. Either type can be used with either

terminal type, but the older serial entrance units are typically used on Asterix2 systems and the

newer RF entrances are used with the Asterix3 terminals. The primary difference between them

is how they are controlled from the host.

The serial entrance units are controlled by NT Services (one service per entrance unit). These

services are named “PssEntrance01,” “PssEntrance02,”, etc. These services are WaveWorks

clients and directly control the entrance display and process input. The RF entrance units

communicate with a single instance of an NT service (EhtService) that translates STEP

commands into low-level commands the hardware can understand. DisplayServer scripts handle

the screen display and input processing.

Printers

Transaction tickets are (optionally) printed at the conclusion of a self-scan shopping trip. The

ticket is used to direct the shopper to a quick pay or rescan lane and also as a means of

identifying the shopper to the POS system. Transaction tickets are an optional feature of the PSS

system. PSS supports three types of ticket printers: RF rack, serial rack, and serial service

terminal. For installations that do print tickets, a printer is needed at the return rack and at the

service terminal.

Power Supplies

The PSS system also manages power supplies. There isn’t much to manage aside from ensuring

that only one terminal per power supply is unlocked at a time. Unlocking more than one

terminal at a time could cause the power supply to fail. Power supplies normally have a status of

Ready (status code = 0). If a terminal that is powered by the power supply is being unlocked, the

status is set to Reserved (status code = 1). If all the terminals attached to a power supply report

that they are on battery power, then the power supply status is set to “Check Hardware” (status

code = 6) to indicate that perhaps the power supply has failed or is unplugged.

8.2.2 Software Components

The Unit Management subsystem consists of the following software:

Unit Management COM objectprovides all the UMS business services. The services

maintain data on hardware status, battery level, and terminal location. The services also send

commands to the hand held terminals while they are in the dispenser. The UMS transaction

model (description of all UMS transactions) is found in the Appendix.

Entry Station Serviceuses PSA’s Hardware Isolation Library (HIL) to communicate with the

Entrance Station hardware devices (serial entrance stations only).