Appendix 2 Sample Program; Appendix 2.1 Sequence Program - Mitsubishi Electric MELSEC Q Series User Manual

APPENDICES

Appendix 2 Sample Program

Appendix 2.1 Sequence program

The sequence program of this appendix is used to make operate the servo motor for 1 axis.
When diverting the programs examples introduced in this manual to the actual system, fully verify
that there are no problems in the controllability of the target system. And, add the interlock condition if
required in the target system.
Creation procedure for the standard sequence program of QD74MH is shown below.
(1) JOG operation, OPR operation positioning control and continuous path control
can be executed by setting the data to the buffer memory in QD74MH.
The monitor data of the current value and error codes, etc. can be referred by
reading the data of buffer memory.
Data is transferred via the buffer memory between the PLC CPU and QD74MH
in the figure below.
Use the GX Developer to create the sequence program and debugging.
GX Developer
PLC CPU
Sequence program
Transfer the parameters,
positioning data and control
data to the buffer memory.
CAUTION
Sequence program
Monitor
ON/OFF/
Device
Current value
U0\G1700
10000000
U0\G1702 100000
QD74MH
APP - 2
Buffer memory
Parameter
Monitor data
Control data
Positioning data
Servo parameter
MELSEC-Q
Positioning
control