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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 0
1
0
 
Fig. 12.51 Operation of deceleration start flag