YASKAWA ELECTRIC
SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
287
•
During Run:
When the Safe Disable function is triggered during run, close the circuit between terminals H1-HC and H2-HC
to disable
“
Safe Torque Off
”
after clearing the Run command. Enter the Stop command, then enter the Run
command when terminals H1 and H2 are ON or OFF.
■
Safe Disable Monitor Output Function and Keypad Display
Refer to
for information about the relation between the input channel status, Safety monitor output
status, and drive output status.
Table 4.23 Safe Disable Input and External Device Monitor (EDM) Terminal Status
Input Channel Status
Safety Monitor Output Status
Drive Output
Status
Keypad Display
LED Status
Ring
Input 1
(H1-HC)
Input 2
(H2-HC)
MFDO Terminal
(H2-xx = 21)
MFDO Terminal
(H2-xx = 121)
ON
(Close the circuit)
ON
(Close the circuit)
OFF
ON
Baseblock
(Drive ready)
Normally
displayed
Ready:
Illuminated
OFF
(Open)
ON
(Close the circuit)
OFF
ON
Safety status
(STo)
SToF
(Flashing)
ALM/ERR:
Flashing
ON
(Close the circuit)
OFF
(Open)
OFF
ON
Safety status
(STo)
SToF
(Flashing)
ALM/ERR:
Flashing
OFF
(Open)
OFF
(Open)
ON
OFF
Safety status
(STo)
STo
(Flashing)
Ready: Flashing
Safety Function Status Monitor
The drive Safety monitor output sends a feedback signal about the status of the Safety function. The Safety
monitor output is one of the possible settings available for the MFDO terminals. If there is damage to the Safe
Disable circuit, a controller (PLC or safety relay) must read this signal as an input signal to hold the "Safe Torque
Off" status. This will help verify the condition of the safety circuit. Refer to the manual for the safety device for
more information about the Safety function.
It is possible to switch polarity of the Safety monitor output signal with the MFDO function settings. Refer to
for setting instructions.
Keypad Display
If the two input channels are OFF (Open), the keypad will flash
STo [Safe Torque OFF]
.
If there is damage to the Safe disable circuit or the drive, the keypad will flash
SToF [Safe Torque OFF
Hardware]
when one input channel is OFF (Open), and the other is ON (Short circuit). When you use the Safe
disable circuit correctly, the keypad will not show
SToF
.
If there is damage to the drive, the keypad will show
SCF [Safety Circuit Fault]
when the drive detects a fault in
the Safe disable circuit. Refer to the chapter on Troubleshooting for more information.
■
Validating the Safe Disable Function
After you replace parts or do maintenance on the drive, first complete all necessary wiring to start the drive, then
test the Safe Disable input with these steps. Keep a record of the test results.
•
When the two input channels are OFF (Open), make sure that the keypad flashes
STo [Safe Torque OFF]
, and
make sure that the motor is not running.
•
Monitor the ON/OFF status of the input channels and make sure that MFDO set to the EDM function operates
as shown in
.
If one or more of the these items are true, the ON/OFF status of the MFDO may not display correctly on the
keypad:
–
Incorrect parameter settings.
–
A problem with an external device.
–
The external wiring has a short circuit or is disconnected.
–
There is damage to the device.
Find the cause and repair the problem to correctly display the status.
•
Make sure that the EDM signal operates during usual operation as shown in