Input Signal Functions - Mitsubishi Electric MELSEC Q Series User Manual

3 SPECIFICATIONS

3.4.2 Input signal functions

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(1) Module ready flag (Xn0)
(a) This signal turns on as soon as the Q64TC is ready when the programmable
controller CPU is powered on or reset.
(b) Read/write of the Q64TC buffer memory data from the programmable
controller CPU is performed when the temperature control module ready flag
is on.
Write command
(c) This signal turns off on detection of a watchdog timer error. The Q64TC stops
temperature control operation and turns off the output.
(2) Operation mode status (Xn1)
This signal turns on in the operation mode and turns off in the setting mode.
Do not change the set value during mode shift processing.
Operation mode
command (Yn1)
Operation mode
status (Xn1)
Setting mode
(3) Write error flag (Xn2)
This signal turns on at write error occurrence.
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.
(4) Hardware error flag (Xn3)
This signal turns on when the temperature control module results in a hardware
error.
search engine
X1
Used as buffer memory read/write interlock.
Operation mode
During mode
shift processing
MELSEC-Q
TOP H0 H22 K100 K1
Setting mode
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