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MELSEC-Q
12 CONTROL SUB FUNCTIONS
12.7.9 Deceleration start flag function
The "deceleration start flag function" turns ON the flag when the constant speed status
or acceleration status switches to the deceleration status during position control whose
operation pattern is "Positioning complete". This function can be used as a signal to
start the operation to be performed by other equipment at each end of position control
or to perform preparatory operation, etc. for the next position control.
For the "deceleration start flag function", the following will be explained.
[1] Control details
[2] Precautions during control
[3] Deceleration start flag function setting method
[4] Checking of deceleration start flag
[1] Control details
When deceleration for a stop is started in the position control whose operation
pattern is "Positioning complete", "1" is stored into "
Md
.48
Deceleration start
flag". When the next operation start is made or the manual pulse generator
operation enable status is gained, "0" is stored. (Refer to Fig. 12.51.)
(1) Start made with positioning data No. specified
Time
Operation pattern: Positioning complete (00)
V
Md.48
Deceleration start flag
010
Fig. 12.51 Operation of deceleration start flag