Mitsubishi Electric SV13/22 Programming Manual page 124

5. SEQUENCE PROGRAMS AND SFC PROGRAMS
[Error Details]
[Program Example]
X000 M2002
0
CIRCUIT END
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(1) In the following cases an operation error occurs and the DSFLP instruction is
not executed.
• When the setting for (D) is other than 1 to 8/1 to 4.
• When the setting for n is a value other than 1.
• When the setting for (D) or n has been indirectly designated using an index
register (Z, V).
(2) In the following cases, a minor error (error on control change) occurs and the
present value change/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 zeroing when the speed change
is made.
• When the axis designated in (D) is decelerating when the speed change is
made.
• When the absolute value of speed designated in n exceeds the speed limit
value when the speed change is made.
The program shown below changes the positioning speed of axis 2 to the value set
with an 8-digit digital switch.
(1) Conditions
1) Numbers of inputs for the digital switch......... X010 to X02F
2) Speed Change command.............................. Leading edge (OFF→ON) of
(2) Program example
Speed change in progress flag
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
P K8
DBIN X0010
P
DSFL D2
Execution
command Speed change in progress flag
Positioning start completion signal
Start reception
Positioning start
completion signal
Positioning completion
signal
5 − 16
X000
The value set with the digital switch is stored
in the speed change register for axis 2
D968
(D968, D969).
K
Axis 2 present value change execution
1
request
CHGV J2 K10
Speed changes designated during this
period may be invalid.