External Signal Logic Selection; Control Details; Data Used For Control - Mitsubishi Electric MELSEC Q Series User Manual

10 FUNCTION DETAILS

10.18 External Signal Logic Selection

10.18.1 Control details

When the hardware stroke limit is required to be wired, ensure to wire it in the negative logic
using B-contact. If it is set in positive logic using A-contact, the hardware stroke limit may not be
detected even if the signal wires are disconnected.

10.18.2 Data used for control

Symbol
Parameter Pr.31
The upper hardware stroke limit (FLS), the lower hardware stroke limit (RLS), and the
dog signal (DOG) can be input by using the input signal of the servo amplifier.
And, the logic selection of input signal is possible. Select the negative logic or positive
logic in " External input signal logic selection".
Pr.31
(1) Negative logic
(a) Input signal is OFF.
1) FLS, RLS
2) DOG
(b) Input signal is ON.
1) FLS, RLS
2) DOG
(2) Positive logic
Opposite of the negative logic
Set the following parameters for the external signal logic selection.
Refer to Section 6.3 to 6.8 for the buffer memory address and details.
Item
External input signal logic selection Select the logic of the external input signal.
Limit switch is in operation. (Stroke prohibited area)
OFF
Limit switch is removed. (Stroke movement allowed area)
ON (DOG ditection)
CAUTION
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MELSEC-Q
Details