5.2 HWBB Function
5.2.5 Detecting Errors in HWBB Signal
5-9
5
S
afety Function
s
5.2.5
Detecting Errors in HWBB Signal
If only the /HWBB1 or the /HWBB2 signal is input, an A.Eb1 alarm (Safety Function Signal Input
Timing Error) will occur unless the other signal is input within 10 seconds. This makes it possi-
ble to detect failures, such as disconnection of an HWBB signal.
5.2.6
HWBB Input Signal Specifications
If an HWBB function is requested by turning OFF the two HWBB input signal channels
(/HWBB1 and /HWBB2), the power supply to the Servomotors for axis A and axis B will be
turned OFF within 8 ms.
Note: 1. The OFF status is not recognized if the OFF interval of the /HWBB1 or /HWBB2 signal is 0.5 ms or shorter.
2. You can check the status of the input signals by using monitor displays. Refer to the following manual for
your SERVOPACK for details.
Σ
-7-Series
Σ
-7W SERVOPACK with MECHATROLINK-III Communications References Product Manual
(Manual No.: SIEP S800001 29)
Σ
-7-Series
Σ
-7C SERVOPACK Product Manual (Manual No.: SIEP S800002 04)
5.2.7
HWBB Input Signal Waveform Trace
You can trace the following input signals with the I/O trace function of the S.
•
/HWBB1 (Hard Wire Base Block Input 1) signal
•
/HWBB2 (Hard Wire Base Block Input 2) signal
Refer to the following manual for details on the I/O trace function.
AC Servo Drives Engineering Tool S Online Manual
Σ
-7 Component (Manual No.: SIEP S800001 48)
C
A
UTION
The A.Eb1 alarm (Safety Function Signal Input Timing Error) is not a safety-related element.
Keep this in mind when you design the system.
/HWBB1
/HWBB2
8 m
s
max.
ON (normal
operation)
OFF (motor current
s
hut-OFF reque
s
t)
HWBB
s
tate
S
ERVO-
PACK
S
tatu
s
Normal operating
s
tate
