Mitsubishi Electric MELSEC-Q Series User Manual page 699

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[Program example]

Pre-reading start program (when positioning start signal Y10 is used)

Use the direct access input as BUSY

signal to use this program example.

[2] Precautions during control

(1) The time required to analyze the positioning data is up to one operation cycle.

(2) After positioning data analysis, the system is put in an execution prohibition

flag OFF waiting status. Any change made to the positioning data in the

execution prohibition flag OFF waiting status is not reflected on the

positioning data. Change the positioning data before turning ON the

positioning start signal.

(3) The pre-reading start function is invalid if the execution prohibition flag is

turned OFF between when the positioning start signal has turned ON and

when positioning data analysis is completed (Ta<start time, Ta: Refer to Fig.

(4) The data No. which can be executed positioning start using "[Cd.3]

Positioning start No." with the pre-reading start function are No. 1 to 600 only.

Performing the pre-reading start function at the setting of No. 7000 to 7004 or

9001 to 9004 will result in the error "Outside start No. range" (error code: 543).

(5) Always turn ON the execution prohibition flag at the same time or before

turning ON the positioning start signal. Pre-reading may not be started if the

execution prohibition flag is turned ON during Ta after the positioning start

signal is turned ON. The pre-reading start function is invalid if the execution

prohibition flag is turned ON after positioning start with the execution

prohibition flag OFF. (It is made valid at the next positioning start.)

[3] Program examples

Chapter 13 Control Sub Functions

<Pre-reading start command pulse>