Toshiba SX 2000 - Manual (Page 163)

Check the S2T based on the following points every six months. Also perform checks
when the operating environment is changed.
Chapt.5 Maintenance and Checking
5.2 Periodical checking items
Item Content of checking Criteria
Power supply Measure the voltage of the power (at the ter­
minal of the module)
85 to 264Vac
Check that the terminal screw of the module
is not loose.
Check that the terminal screw
of the module is not loose.
Check that wiring cable is not damaged. Check that wiring cable is not
damaged.
Installation
condition
Check that the basic unit is installed
securely.
Not loose, no play
Check that the expansion unit is installed
securely.
Not loose, no play
Check that each module is installed securely. Not loose, no play
Check that each expansion cable connector
is not loose; and the cable is not damaged.
Not loose, no damaged
Programming Check that the functions of the programming
tool are normal.
Try executing simple opera­
tions.
Check that the connector and the cable are
not damaged.
Not damaged
I/O modules Measure the voltage of each of the I/O mod­
ules at the terminal block.
The voltage must be within the
specified range.
Check the LED of the input status display. The LED must light normally.
Check the LED of the output status display. The LED must light normally.
Check that the I/O terminal block is installed
securely.
Not loose, no play
Check that the terminal screw is not loose
and the terminal has a sufficient distance to
the next terminal.
Not loose, and not contacting
the next terminal
Check that the wiring cable is not damaged. Not damaged
Environment Check that the temperature, humidity, vibra­
tion, dust, etc. are within the specified range.
Must be within the general
specification range.
Program Check that the content of the S2T program
and the master program (e,g., saved on a
HDD disk) are the same.
Check that these programs
are identical by comparison.
Battery Check whether the battery must be replaced.
(The installed date is written on the CPU bat­
tery cover.)
Replace the current bettery if
more than two years has
elapsed.
Check that the connector of the battery is
inserted firmly.
Not loose
1. Turn off power before checking voltage on terminals. Failure to do so can cause electrical
shock.
2. Do not modify the S2T in hardware nor software. This can cause Are, electrical shock or
injury.
146
Sequence Controller S2T