User manual

Publication 1747-UM011F-EN-P - May 2007
System Installation Recommendations 73
If the input voltage to the 1746-P7 power supply falls into a range of
4...9V for a period exceeding the CPU hold-up time, the controller
turns OFF and will not turn back ON until the input voltage is
increased to 11V dc.
SLC 500 Operation with 24V dc User Power Overcurrent Condition
Power Supply Cat. No. SLC Operation Recovery Procedure
1746-P1 series A (made in Japan) power supply shutdown, CPU fault Reload user program
1746-P1 series A (made in Malaysia -
current production)
24V dc user shutdown, CPU continues Correct overcurrent condition
1746-P2 series A and B power supply shutdown, CPU fault Reload user program
1746-P2 series C 24V dc user shutdown, CPU continues Correct overcurrent condition
1746-P4 series A power supply shutdown, CPU fault Reload user program
1746-P5 series A 24V dc user shutdown, CPU continues Correct overcurrent condition
1746-P6 series A 24V dc user shutdown, CPU continues Correct overcurrent condition
ATTENTION
For 1746-P1 (made in Malaysia), 1746-P2 series C, 1746-P5
series A, and 1746-P6 series A power supply, to avoid
unexpected operation due to 24V dc user power shutdown,
monitor the 24V dc user output with a 24V dc input channel.