Mitsubishi Electric Melsec-Q172DCPU - Page 84

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2 SYSTEM CONFIGURATION
No. Name Application
1)
POWER
LED
AC input
power supply
ON (green) : Normal (5VDC output, momentary power failure within 20ms)
OFF : • AC power supply is ON, however, the power supply module is out of order.
(5VDC error, overload, internal circuit failure, blown fuse)
• AC power supply is not ON
• Power failure (including an momentary power failure of more than 20ms)
DC input
power supply
ON (green) : Normal (5VDC output, momentary power failure within 10ms)
OFF : • DC power supply is ON, however, the power supply module is out of order.
(5VDC error, overload, internal circuit failure, blown fuse)
• DC power supply is not ON
• Power failure (including an momentary power failure of more than 10ms)
2) LIFE LED
ON (green) : When operation has started
ON (orange) : Remaining life of the module approx. 50%
FLASH (orange) : • ON for 5 seconds and OFF for 1 second:
Remaining life of the module is approx. 1 year
• At intervals of 0.5 seconds:
Remaining life of the module is approx. 6 months
OFF : • Module life expired
• Ambient temperature is out of range (The ambient temperature of the
module is exceeding the specification and the life detection function
has stopped.)
ON (red) : Ambient temperature is out of range (The ambient temperature of the
module is exceeding the specification.)
FLASH (red) : Function failure (at intervals of 1 second)
3)
ERR.
terminal
• Turned ON when the whole system operates normally.
• This terminal turns OFF (opens) when the power is not input, a stop error (including a
reset) occurs in the CPU module, or the fuse is blown.
• In a Multiple CPU system configuration, turned OFF (opens) when a stop error occurs in
any of the CPU modules.
Normally OFF when loaded in an extension base unit.
4)
LIFE OUT
terminal
• The output signal of the terminal turns off (opens) when the end of the life is detected.
(Applicable only when the remaining life is 1 year or less).
• Flicker-OFF (opens) when the life diagnostics error (including detection error) is
detected.
(Note-2)
• Flicker-OFF (opens) when the ambient temperature is detected to be out of range.
• The output signal of the terminal turns OFF (opens) when the watchdog timer error is
detected in the module.
The 4 operations listed above are also available when the terminal is mounted on an
extension base unit.
5) FG terminal Ground terminal connected to the shield pattern of the printed circuit board.
6) LG terminal
Grounding for the power supply filter. The potential of Q61P-A1, Q61P-A2, Q61P,
Q61P-D, Q62P, Q64P and Q64PN terminal is 1/2 of the input voltage.