Mitsubishi Electric SV13/22 Programming Manual page 127

5. SEQUENCE PROGRAMS AND SFC PROGRAMS
[Error Details]
[Program Example]
X000 M2062 M2420
0
CIRCUIT END
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(1) In the following cases an operation error occurs and the CHGA instruction is
not executed.
• When the setting for (D) is other than J1 to J8/J1 to J4.
(2) In the following cases, a minor error (error on control change) occurs and the
speed change is not executed.
When this happens, the error detection flag (M1607+20n) is turned ON and the
error code is stored in the minor error code area for the relevant axis.
• When the axis designated in (D) is executing a zeroing when the speed
change is made.
• When the axis designated in (D) is decelerating when the speed change is
made.
• When the speed designated by n is outside the range of 0 to the speed limit
value when the speed change is made.
The program shown below changes the present value for axis 2.
(1) Conditions
1) Speed change command............................... Leading edge (OFF→ON) of
(2) Program example
Speed change in progress flag
Positioning start completion signal
POINT
• Points to note when a speed change is performed
• If a speed change instruction (CHGV) is executed in the period between
execution of the servo program start request instruction (SVST/DSFRP)
and the point where the "positioning start completion signal" comes ON,
the speed change may be invalid. To perform speed changes in
approximately the same timing as a start, be sure to enter the positioning
start completion signal ON status as an interlock for execution of the
speed change instruction.
Example)
search engine
CHGV J2
Execution
command Speed change in progress flag
Positioning start completion signal
Start reception
Positioning start
completion signal
Positioning completion
signal
5 − 19
X000
K
Axis 2 present value change execution
10
request
DSFLP D2 K1
Speed changes designated during this
period may be invalid.