Input Signal Functions - Mitsubishi Q Series User Manual

3 SPECIFICATIONS

3.4.2 Input signal functions

Buffer memory
address: 0
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(1) Watchdog timer error flag (Xn0)
This signal turns on when the Q62HLC detects the watchdog timer error.
(2) Setting/operation mode status (Xn1)
This signal turns on in the operation mode and turns off in the setting mode.
The switching of modes is performed by the setting/operation mode command
(Yn1).
Do not change the set value during mode shift processing.
Yn1
OFF
Xn1
OFF
Setting mode
(3) Error flag (Xn2)
(a) This signal turns on at the occurrence of write error to the buffer memory,
the hardware error occurrence, and the abnormal completion of auto tuning.
A write error occurs under any of the following conditions.
• When data is set to the reserved area.
• When a setting change made to the area write-enabled in the setting
mode only is made in the operation mode.
• When data outside the setting range is set.
• When data setting is changed during default setting registration.
At the occurrence of error, the error code and error occurrence factor of
the factor corresponding to the error code (buffer memory address: 0) are
stored. At the occurrence of error, the error code and error occurrence
factor of the factor corresponding to the error code (buffer memory
address: 0) are stored.
(b) By turning on the error reset directive (Yn2), the error flag (Xn2) is turned
off, and the error code is cleared.
Xn2
OFF
00
H
OFF
Yn2
Operation mode
During mode
shift processing
ON
Error code
MELSEC-Q
Setting mode
00
H
ON
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