Chapter 4 CPU Module
4- 4
No. Names Description
①-c ERR LED
y ON (Red): indicates that the error not possible to operate occurred.
y OFF: indicates ‘no error’
①-d
PS LED
(Programmable
Status)
y ON (Red):
▶ In case that ‘user assigned flag’ is ‘On’
▶ ‘In case of operating in the error state by ‘operation proceeding in the
error’ setting
▶ ‘In case that the module is detached or other module is installed in the
state that ‘M.XCHG‘ switch is
‘On’
y OFF:
▶ Indicates ‘no error’
①-e
BAT LED
y ON (Red): in case that battery voltage is lowered
y OFF: no battery error
①-f CHK LED
y ON (Red): indicates the setting is different from standard setting
(Available to add/delete[clear] by parameter)
▶ In case that ‘Module change’ switch is set as ‘Module change’
▶ ‘In case of operating in ‘DEBUG mode’
▶ ‘Forced ON’ setting state
▶ In case that ‘fault mask’, ‘SKIP’ flag is set
▶ In case that Warning occurs during operation
▶ Extended base power error
y Blink: indicates in case arithmetic error occurs during Program Proceeding is set.
y OFF: indicates during operation by standard setting
②-a Boot/Nor switch
Used when downloading the O/S before releasing.
y On (right): executes control action in normal operation mode.
y Off (left): used for manufacturing, user’s operation prohibited.
(Download mode of O/S)
y Note: Boot/Nor switches should be both set in On (right) side.
If set in Off (left) side, it may cause abnormal operation.
②-b
REMOTE enabled
switch
Limits the operation of PLC by remote connection.
y On (right): all function enabled (REMOTE mode)
y Off (left): remote function limited
▶ D/L of program, Operation mode limited
▶ Monitor, data change enabled
②-c
M.XCHG
(Module change
switch)
Used in case of performing the module change during operation.
y On (right): performs the module change
▶ Available to change the module only by key switch operation
y Off (left): completes the module change
③
RUN/STOP mode
switch
Sets the operation mode of CPU module.
y STOP → RUN : executes the operation of program
y RUN → STOP : stops the operation of program
Operates prior to REMOTE switch.
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