Start-Up
4.3 Starting up the PLC
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SINUMERIK 802C
6FC5 597–3AA20–0BP2 (01.02)
Example: The programmer programs a sequence control in the main program using his own
defined cycle counter. The sequence control defines all cyclic signals in the subroutine (UP0);
UP1/UP2 is called every two cycles, and UP 3 controls all signals in steps of three cycles.
4.3.8 Data organization
The data can be divided into three areas:
S non–retentive data
S retentive data
S machine data for the PLC (All these machine data are active after POWER ON.)
Most data, such as process map, timers and counters, are non–retentive data and deleted
with each power–up.
The user has a certain area available for the retentive data (data range 14000000 –140000xx
). All data that are wished to remain their validity even after POWER ON can be stored in this
area.
The user can use the PLC MD (see user interface) to load his program with default data or to
parameterize various program sections.
4.3.9 Interface to the control system
This interface can be selected on the operator panel using the softkeys Diagnosis \ Start–up
\ STEP7 connect.
The V24 interface remains active even after restart or normal power–up. The connection
(STEP7 connect active) to the control system can be checked in the PLC 802 Programming
Tool menu “PLC/Information”. If the interface is active, e.g. the active PLC mode (Run/Stop) is
displayed in this window.
4.3.10 Testing and monitoring the user program
The user program can be analyzed or checked for errors using the following methods:
S PLC Status menu (PCU)
S Status list menu (PCU)
S PLC 802 Programming Tool (see Help menu > Contents and Index, “Debugging” or docu-
mentation “S7–200 Automation System”, Section “Testing and Monitoring Your Program”)
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