User`s manual

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MELSEC-Q
5 SETUP AND PROCEDURES BEFORE OPERATION
5.5 Confirming the wiring
5.5.1 Confirmation items at completion of wiring
Check the following points when completed with the QD70 installation and wiring.
• Is the module correctly wired? ..............................."Connection confirmation"
By making "connection conformation", you can check whether the "QD70 recognizes
the external I/O signals such as the near-point dog and speed-position switching
signals", for example.
The following is the way to make "connection confirmation".
(1) Method using GX Developer
Read the "
Md. 8
External I/O signal" axis monitor data with the monitor function
(Buffer memory batch) and check the read values.
Buffer memory address
Axis 1 Axis 2 Axis 3 Axis 4 Axis 5 Axis 6 Axis 7 Axis 8
Md. 8
External I/O signal
80 180 280 380 480 580 680 780
[Bit pattern]
b15 b0b4b8b12
0 : OFF
1 : ON
Not used
Storage item
Meaning
Zero signal
Near-point dog signal
Speed-position switching signal
Deviation counter clear signal
(Example) Checking the external I/O signals of Axis 1
<GX Developer display screen>
b0 (Zero signal ON)
b1 (Near-point dog signal ON)
b2 (Speed-position switching signal OFF)
b3 (Deviation counter clear signal OFF)
Set the buffer memory address of " Md. 8
External I/O signal" of Axis 1 in decimal.
The states of the external I/O signals can also be checked by system monitor.
For details, refer to "Section 12.3 External I/O signal monitor function".