Toshiba T2N - Manual (Page 99)

6.Troubleshooting
84 PROSEC T2N
When “Receive Time Out” is displayed in Step (4) above, communication
between the programmer and the T2N system has not been established. When
the FLT LED on the CPU module is blinking, there is a malfunction in the CPU
module. When this state does not change even if the power supply of the T2N
system is switched ON again, replace the CPU module. When “Receive Time
Out” is displayed in states without FLT blinking, check the Connection method
of the setup options of the programmer (T-PDS) and the connection state of the
connector cable. When there is no problem with the environmental setting or
the connector cable, a malfunction of communication circuit in the T2N system
or the programmer is suspected.
When the Event History has been displayed, check the registered error
message (“Event”) (No.1 is the latest registered details).
On the next and following pages, the error messages and associated
information registered in the Event History, related special relays, LED display
states after the event and their meaning are collated. When an error occurs,
check its cause and take the necessary steps.
In the “Error Down” state, operations such as program correction will not be
possible. Therefore, carry out operations such as correction after executing
“Error Reset” from the programmer. In order to start up RUN again, either shift
the operation mode switch to RUN after first shifting it to HALT, or execute the
Operation command from the programmer.
In the Table on the next and following pages, the meanings of the symbols for
the system LED displays are as follows:-
:Lit
:Out
:Blinking
:No effect on state.
If RUN is started in the state in which the ROM/RAM shift switch has been
set to ROM (other than when the operation mode switch is P-RUN), the
contents of the EEPROM will be transferred to the RAM memory, and any
corrected contents of the RAM memory will be erased. Therefore, when
setting to RUN after correcting the program in order to check its operation,
start up RUN after executing “program write” by a T-PDS Memory
Management menu.
NOTE