YASKAWA A1000 Series Quick Start Manual page 193

Safe Disable Monitor Output Function and Digital Operator Display
Table 71 explains the drive output and Safe Disable monitor state depending on the Safe Disable inputs.
Safe Disable Input Status
Input 1, H1-HC
OFF
ON
OFF
ON
Safe Disable Status Monitor
With the Safe Disable monitor output (terminals DM+ and DM-), the drive provides a safety status feedback signal. This
signal should be read by the device that controls the Safe Disable inputs (PLC or a safety relay) in order to prohibit
leaving the "Safe Torque Off" status in case the safety circuit malfunctions. Refer to the instruction manual of the safety
device for details on this function.
Digital Operator Display
When both Safe Disable inputs are open, "Hbb" will flash in the digital operator display.
Should only one of the Safe Disable channels be on while the other is off, "HbbF" will flash in the display to indicate that
there is a problem in the safety circuit or in the drive. This display should not appear under normal conditions if the Safe
Disable circuit is utilized properly.
possible errors.
YASKAWA ELECTRIC TOEP C710616 21C YASKAWA AC Drive - A1000 Quick Start Guide
Table 71 Safety Input and EDM Terminal Status
Safe Disable Status
Input 2, H2-HC
OFF
OFF
ON
ON
Refer to Alarm Codes, Causes, and Possible Solutions on page 110
Monitor, Drive Output Status
DM+ - DM-
Safely disabled, "Safe
OFF
Torque Off"
Safely disabled, "Safe
ON
Torque Off"
Safely disabled, "Safe
ON
Torque Off"
Baseblock, ready for
ON
operation
C Standards Compliance
Digital Operator Display
Hbb (flashes)
HbbF (flashes)
HbbF (flashes)
Normal display
to resolve
C
193