Toshiba Programmable Controller PROSEC T3 - Manual (Page 77)

S.Maintenance and Checking
5.1
Daily checking items To maintain the system and to prevent troubles, check the following
points on dally basis.
Item Content of checking Corrective measures
LEDs on the
power supply and
CPU modules
POV\ER (green): Ut when 5V
power normal
RUN (green): Ut when
operating normally
FAULT (red): Not Ht when the
CPU normal.
I/O (red): Not tit when the
I/O modules normal.
ВАТТ (green): Lit when the
battery voltage normal.
If the LEDs are
abnormal, see Section
6, Troubleshooting.
Input LEDs
(digital input)
Ut when the corresponding
input signal is ON. •Check that the
input voltage is within
the spedfied range.
• Chedc that the input
terminaJ block is not
loose.
•Check that th
modules are instdled
securely.
Output LEDs
(digital output)
Lit when the output is ON and
the corresponding external
load should operate. Also,
check that the LEDs (FL, FH,
or F), which indicate a blown
fuse and/or abnormal external
power, are not lit.
•Qieck that the
external load voltage
is within the specified
range.
• Check the built-in
fuses.
•Check that the output
terminal blodc is not
loose.
•Check that the
modules are installed
securely.
Switches on the
CPU module
Ched( №at the operation mode
switch (HALT/RUN/P-RUN)
and the RAM^OM switch are
at the correct position.
Operations are executed when
the mode switch is set to RUN
or P-RUN.
Change the switch to
the correct position.
CAUTION If a serious error (e.g., the system RAM abnormal) is
detected when the power is turned ON, the FAULT and
I/O LEDs will blink. In this state, communication with the
programmer is not possible. If that error continues even
if the power is again turned ON, replace the CPU
module.
User's manual - Hardware
69