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MELSEC-Q
3 SPECIFICATIONS
(2) Multitask Execution Start Signal [X0B]
(a) When the QD51 (-R24)'s mode setting switch 1
1 is set in the "Run Mode
(0 or 1)", this signal is enabled (it carries out ON/OFF control).
(If the QD51 (-R24) is in a mode other than the Run mode, it remains OFF
and does not change.)
(b) If the QD51 (-R24) is in the Run mode, after the power is turned on or after
a Reset, if multitask execution is enabled, this signal goes ON.
In a sequence program, use it as an interlock for enabling or disabling the
FROM/TO command.
(When the QD51 (-R24) is not in the multitask execution enabled state,
an attempt to execute the FROM/TO command will result in a "SP UNIT
DOWN" error and the programmable controller CPU will stop its operation.)
2
If data D0 is written from the programmable controller CPU to the QD51 (-
R24)'s buffer memory address 0.
Write
Instruction
X0B
FROM/TO command execution enable/disable interlock
T0 H0 K0 D0 K1
REMARK
1 Refer to Section 5.6.2 for details of the mode setting switch.
2 When the QD51(-R24) is reset by the reset request signal (Y1A), execution of
the FROM/TO command within the access enabled time after the Y reset, will
not cause an error.
(Resetting the QD51(-R24) turns OFF the multitask execution start signal
(X0B).)
The access enabled time after Y reset can be set in the intelligent function
module switch setting of the GX Developer. (Refer to Section 5.6.2.)
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