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Advant
®
Controller 450 User’s Guide
Section 4.1.12 Initialization of Process Communication
3BSE 002 415R701 Rev A
4-29
Note the following regarding data exchange.
•
Input signals from the data base:
The reading-in element (GET element) is created automatically by the engineering station.
•
Output signals to the data base:
The reading-out element (PUT element) is created automatically by the engineering
station.
•
An output signal is created by a PC element with higher priority than the PC element
coupled to the output signals:
A GET element is created in the execution unit containing the receiving PC element.
•
An output signal is created by a PC element with a lower priority than the PC element
coupled to the output signal:
A PUT element is created in the execution unit in which the output signal is created.
•
An output signal is created by a PC element with the same priority as the PC element
coupled to the output signal:
No GET or PUT elements are created since PC elements cannot interrupt each other’s
execution.
4.1.12 Initialization of Process Communication
When the system is started, the fault-indicating red LEDs on the I/O boards illuminate. If the
system goes to the working mode CONFIGURATION, the LEDs remain active. If the mode
goes to OPERATION, the process communication starts and the following start sequence is
executed:
•
Check and initialization of I/O boards.
–
The internal functions on each board are checked. Analog input boards are tested by
reading-in and limit check of any reference channels.
–
The parameters stored in the data base are read-out to the circuit boards.
–
The fault indications extinguish if no fault is detected during the check and
initialization procedures. If, however, a fault is detected, the fault indication remains
active and an error message is sent to the programming unit connected. If the board
concerned is not defined by the user during the configuration phase, the board is not
processed and the error indication persists.
•
Initialization of outputs.
–
All of the outputs are deactivated in connection with the start. This is completely
controlled by the hardware.
–
During the initialization procedure, a start value, stored in the data base, is issued to
the output concerned. Select either a fixed start value or the value of the signal in the
data base before the start.
Summary of Contents for Advant Controller 450
Page 1: ...Advant OCS with Master software GYDQW RQWUROOHU User s Guide 3BSE 002 415R701 Rev A ...
Page 26: ...Advant Controller 450 User s Guide Table of Contents 3BSE 002 415R701 Rev A xvi ...
Page 30: ...Advant Controller 450 User s Guide Table of Contents 3BSE 002 415R701 Rev A xx ...
Page 488: ... GYDQW RQWUROOHU 8VHU V XLGH SSHQGL DUGZDUH 0RGXOHV A 48 3BSE 002 415R701 Rev A ...
Page 508: ...Advant Controller 450 User s Guide Appendix D Item Designations D 12 3BSE 002 415R701 Rev A ...
Page 518: ...Advant Controller 450 User s Guide Appendix F Load Calculation F 4 3BSE 002 415R701 Rev A ...
Page 522: ...Advant Controller 450 User s Guide Appendix G Memory Calculation G 4 3BSE 002 415R701 Rev A ...
Page 528: ...Advant Controller 450 User s Guide Appendix H Halt Codes H 6 3BSE 002 415R701 Rev A ...
Page 562: ...Advant Controller 450 User s Guide Index iv 3BSE 002 415R701 Rev A ...
Page 563: ......
Page 564: ...3BSE 002 415R701 Rev A March 2000 ...