Specifications

6 - 14
6.7 Creating Positioning Sequence Program
1) Condition for sequence program
For the system using the QD75, always set the following program.
PLC READY
SM1039
Y0A0
Interlock
(QCPU RUN)
QD75 READY
Provide the start interlock.
Axis 1 error detection
Sequence
program for
QD75
X0A8
X0A0
Axis 2 error detection
X0A9
Axis 3 error detection
X0AA
Axis 4 error detection
X0AB
Figure 6.1 Required program
2) Reset of PLC READY
To use the sequence program that detects errors, write the routine that turns OFF
the PLC READY (Y0A0) at error detection in the sequence program.
3) OPR
At power-ON or start of operation, carry out OPR to check the original position.
Also, it is recommended to carry out OPR when the OPR request is issued.
4) Limit switch for zeroing dog
For a limit switch, use the one with a highly reliable contact. If the signal of zeroing
dog is not input at OPR, the movement continues at the OPR speed.
5) Processing for overrun
Setting the upper and lower stroke limit of the QD75 prevents overrun. However, this
prevention works only when the QD75 is in normal operation. In terms of the safety
of the overall system, it is recommended to install the external circuit which turns off
the motor power with the limit switch ON.
6) Emergency stop signal
The STOP input signal is a stop signal for normal operation. The emergency stop
signal must be separately prepared in the external circuit of the PLC program.