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To execute a program the Resource uses one or more tasks. A task controls the time scheduling of a
program. Tasks are typically cyclic which means that they are executed periodically with a given time
interval. The Setup Wizard creates one task named T10MS, which is executed every 100th millisecond,
for each of the resources.
The program that is executed by a task is called POU, or Program Organization Unit. The Setup Wizard
creates one POU for each station in the system. They are named Main01 for the first station, Main02 for
the second, and so on. When created all Main programs looks the same since they are copied from the
PowerMACS standard template. Normally you must adopt the program for each individual station. You do
that by double clicking on the icon representing the variable worksheet (MainNNV) and/or the icon
representing the logic worksheet (MainNN) of the program of interest.
Each resource has a number of variables that are global within the resource. These are defined on the
worksheet named Global_Variables and can be used in all your programs (POUs) executed by the
resource.
The variables defined on Global_Variables are divided in the following groups:
Default
and
Global_Variables
: - Consists of a number of PLC internal variables that can be used
for advanced debugging of your PLC program.
System_Globals
: - This group contains all variables interfacing the PLC with the tightening
controller part of the PowerMACS system. See
ExtCom_API_Variables
: - This group contains variables that are mapped to optional external
communication and/or API devices. See
and
for how this is configured and used.
CycleData_Variables
: - This group contains variables that are mapped to the optional cycle data
interface. See the description of
in chapter: Peripheral Devices, for how this is done.
DC_PLUS_Variables
: - This group contains all PLC variables used for interfacing a DC PLUS
server. See the description of
in chapter: Peripheral Devices, for how this is done.
AUDI_XML_Variables
: - This group contains all Audi XML device variables.
Shared_Variables
: - This group contains variables that are shared between the optional fieldbus
interface and the digital I/O interface. See chapter:
for a detailed description.
Содержание PowerMACS 4000
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Страница 422: ...Peripheral Devices 422 9836 3521 01 When connected to a system the form will show show the signal values in realtime...
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