Detecting Errors In Hwbb Signal; Hwbb Input Signal Specifications; Operation Without A Host Controller - YASKAWA E-7S SERVOPACK SGD7S Product Manual

11.2.4

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.
 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.
11.2.5

HWBB Input Signal Specifications

If an HWBB is requested by turning OFF the two HWBB input signal channels (/HWBB1 and /
HWBB2), the power supply to the Servomotor will be turned OFF within 8 ms.
/HWBB1
/HWBB2 ON (normal
operation)
SERVO-
PACK Status
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 section for
details.
9.2.3 I/O Signal Monitor on page 9-6
11.2.6

Operation without a Host Controller

The HWBB will operate even for operation without a host controller.
However, if the HWBB operates during execution of the following functions, leave the execution
mode for the function and then enter it again to restart operation. Operation will not be
restarted simply by turning OFF the /HWBB1 and /HWBB2 signals.
Applicable Functions
• Jog operation
• Origin search
• Program jog operation
• Automatic adjustment without
host reference
• Easy FFT
• Adjustment of motor current
detection signal offset
8 ms max.
Normal operating status
Function
execution
status
/HWBB1
/HWBB2
SERVOPACK
Status
11.2 Hard Wire Base Block (HWBB)

11.2.4 Detecting Errors in HWBB Signal

CAUTION
OFF (motor current
shut-OFF request)
HWBB state
Resetting the HWBB State
After you turn ON the /HWBB1 and
/HWBB2 signals, leave the execution mode
for the function and then enter it again.
Function
execution mode
OFF (motor
current
shut-OFF
ON (normal
ON (normal
operation) request)
operation)
Operating
HWBB state
Status
Not function
Function
execution mode
execution mode
Operating
BB state
Status
11-5
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