PC Control / Profi Control 645-12M Instruction Manual pdf - Kuhnke
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PC Control / Profi Control 645-12M Instruction Manual pdf - Kuhnke

PC Control / Profi Control 645-12M Instruction Manual pdf - Kuhnke PC Control / Profi Control 645-12M Instruction Manual pdf - Kuhnke

kuhnke.com
28.03.2014 Views

PLC error and failure handling Legend for the failures/errors summary Error byte "ERR00.00" The number of the error/failure is written into an error byte (ERR00.00) so that it can be analysed in the user program: Example: L ERR00.00 C8T1 O00.00 ;binary display to 8 outputs Interrupt module [no.] The error/failure triggers an interrupt (IRQ). This causes the monitor program to immediately call up the assigned interrupt module. In the following sections, various types of failures/errors are described and suggested reactions are explained. 4 - 70

4.10.2. Undervoltage (supply, failure no. 2) PC Control 645-12M used as PLC 4.10.2.1. Without external supply The PC supplies PC Control 645-12M with 5 V. If the voltage supply falls below 4.7 V, PC Control 645-12M immediately triggers a RESET. All unbuffered data will get lost. There will be no error message or failure indication. 4.10.2.2. With external supply 1st stage This monitoring function is only enabled while the PC is off and if the external supply fails. Supply voltage: 24 V DC -20%/+25% There is a two-stage reaction by the built-in voltage monitoring function to the falling below certain limiting values: Cause Reaction Indication Supply voltage c. < 19 V -- interrupt module no. 17 will be activated -- the program run will not be interrupted as yet Buffered operands (markers, timers, counters) may be involuntarily reset if the user program is continued to be processed at this stage. This could be caused by decentralised inputs that might detect a 0 signal due to the undervoltage condition. -- LED "failure" flashes (if exists) -- error byte "ERR00.00" is set to 2 4 - 71

PLC error and failure handling<br />

Legend for the failures/errors summary<br />

Error byte "ERR00.00"<br />

The number of the error/failure is written into an error byte<br />

(ERR00.00) so that it can be analysed in the user program:<br />

Example: L ERR00.00<br />

C8T1 O00.00 ;binary display to 8 outputs<br />

Interrupt module [no.]<br />

The error/failure triggers an interrupt (IRQ). This causes the<br />

monitor program to immediately call up the assigned interrupt<br />

module.<br />

In the following sections, various types of failures/errors<br />

are described and suggested reactions are explained.<br />

4 - 70

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