YASKAWA L1000A Technical Manual page 497

Digital Operator Display
Note: Terminals H1, H2, DM+, and DM- on 600 V class models are designed to the functionality, but are not certified to IEC/EN
61800-5-2, ISO/EN 13849 Cat. 3, IEC/EN 61508 SIL2, Insulation coordination: class 1.
In contrast to terminals DM+/DM-, the safe disable monitor function that can be programmed for a digital output
(H2- = 58) is a software function and can be used for EN81-1 conform one contactor solutions but not as an EDM
signal according to IEC/EN 61800-5-2.
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,
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.
If a fault in the safety circuit of the drive is detected, "SCF" will be displayed in the LCD operator. This indicates damage
to the drive. Refer to Fault Displays, Causes, and Possible Solutions on page 286
Validating Safe Disable Function
■
When you start-up, replace parts or conduct maintenance, you must always perform the following validation test on the
safe disable inputs after completing the wiring. (Check results should be maintained as a record of tests performed.)
• When the H1 and H2 signals turn OFF, confirm that "Hbb" is displayed on the LCD operator, and that the motor is not
in operation.
• Monitor the ON/OFF status of the H1 and H2 signals and confirm the EDM signal by referring to
If the ON/OFF status of the signals do not coincide with the display, the following must be considered: an error in the
external device, disconnection of the external wiring, short circuit in the external wiring, or a failure in the drive. Find the
cause and correct the problem.
• In normal operation, confirm the EDM signal by referring to
YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual
Refer to Alarm Codes, Causes, and Possible Solutions on page 299
D.4 Safe Disable Input Function
" HbbF " will flash in the display to indicate that
for details.
Table D.14.
to resolve
Table D.14.
D
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