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