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
