YASKAWA UAK series User Manual

8.8 Hard Wire Base Block (HWBB) Function
8-43
Operation
8
8.8.11 Application Example of HWBB Function
An example of using HWBB function is shown below.
(1) Connection Example
When a guard opens, both of signals, the /HWBB1 and the /HWBB2, turn OFF, and the EDM signal is ON.
Since the feedback is ON when the guard closes, the device is reset, and the /HWBB1 and the /HWBB2 sig-
nals turn ON, and the operation becomes possible.
Note: The EDM signal is used as a sourcing output. Connect the EDM so that the current flows from EDM1+ to
EDM1- or EDM2+ to EDM2-.
(2) Failure Detection Method
In case of a failure such as the /HWBB1 or the /HWBB2 signal remains ON, the device is not reset when the
guard closes because the EDM signal keeps OFF. Therefore starting is impossible, then the failure is
detected.
In this case, an error in the external device, disconnection or short-circuiting of the external wiring, or a failure
in the SERVOPACK must be considered. Find the cause and correct the problem.
/HWBB1+
A1
A2
T11 T12 T21
T31 T32 T33 S24 S14
T22
/HWBB1-
/HWBB2+
/HWBB2-
EDM!+
EDM!-
0 V
Σ-V-SD driver
Output
24-V power
supply
Guard
Device
manufactured
by OMRON Corp.
G9SX-BC202
Close
Limit switch
Power
supply
input
Input
Open

YASKAWA UAK series Specifications

General

Brand	YASKAWA
Model	UAK series
Category	Servo Drives
Language	English