2 periodical checking items – Toshiba SX 2000 User Manual
Page 163
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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