Mitsubishi Electric MELSEC iQ-F Series FX5 User Manual page 55

■Input signals ON/OFF status
The input signals ON/OFF status is determined by the external wiring and logic settings.
For example, near-point dog signals (DOG) (Other input signal operations are the same as for near-point dog signals (DOG).)
*1*2
Logic settings External wiring
Negative logic (default value) ■When no voltage is applied
■When voltage is applied
■When no voltage is applied
Positive logic
■When voltage is applied
*1 Make the logic settings using "[Pr.22] Input signal logic selection". For details on the settings, refer to the following.
Page 389 [Pr.22] Input signal logic selection
*2 If using upper limit signals (FLS) and lower limit signals (RLS), make sure to wire as contact b using the negative logic settings.
Positioning stops when this signal is turned OFF.
■Logic settings and internal circuits
The positioning module is defined as "input signals OFF" if the internal circuits (photocoupler) are turned OFF using the
negative logic settings.
Conversely, the positioning module is defined as "input signals ON" if the internal circuits (photocoupler) are turned OFF using
the positive logic settings.
The photocoupler ON/OFF status is described below.
• When no voltage is applied: Photocoupler OFF
• When voltage is applied: Photocoupler ON
*2
DOG
24 V DC
COM
DOG
24 V DC
COM
DOG
24 V DC
COM
DOG
24 V DC
COM
Positioning module ON/OFF status
OFF
ON
ON
OFF
6.3 Connector for Connecting External Devices
6
6 WIRING
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