Delta VFD4A2ME43ANNAA User Manual

Chapter 15 Safe Torque Off FunctionME300
15-11
15-8 Test and Fault Confirmation
After wiring the STO circuit in accordance with Section 15-3 Wiring Diagram, follow the steps
below to verify that the STO and related detection functions are working normally.
1. When the drive is powered on, make sure that the S1–DCM and S2–DCM voltage falls between
11–30 V
DC
. At this time, the drive should enter Standby mode and wait for RUN command. There
is no error displayed on the keypad.
2. Press RUN on the keypad and use the emergency button or other method to make the S1–DCM
and S2–DCM voltage fall between 0–5 V
DC
. At the same time, after the output frequency is
reached, the drive should enter Torque Stop mode STO and stop outputting voltage. The keypad
displays the STO error, and the response time of the S1 and S2 signals to cause the drive to
stop outputting voltage should be ≤ 20 ms. Then restore the S1–DCM and S2–DCM voltage to
11–30 V
DC
, and press RESET on the keypad to clear the STO error. The drive should enter
Standby mode and wait for RUN command.
3. Press RUN on the keypad and use the emergency button or other method to make the S1–DCM
voltage fall between 0–5 V
DC
, and the S2–DCM voltage remain between 11–30 V
DC
after the
output frequency is reached. At this time, the drive should enter Torque Stop mode STL1 and
stop outputting voltage. The keypad displays the ST1 error, and the response time of S1 signals
to cause the drive to stop outputting voltage should be ≤ 20 ms. Then restore the S1–DCM
voltage to 11–30 V
DC
. However, pressing RESET on the keypad cannot clear the STL1 error.
You must cycle the power to the drive. Make sure that the S1–DCM and S2–DCM voltage falls
between 11–30 V
DC
, and then cycle the power to the drive, then the STL1 error is cleared. The
drive should enter Standby mode and wait for RUN command.
4. Press RUN on the keypad and use the emergency button or other method to make the S2–DCM
voltage fall between 0–5 V
DC
, and the S1–DCM voltage remain between 11–30 V
DC
after the
output frequency is reached. At this time, the drive should enter Torque Stop mode STL2 and
stop outputting voltage. The keypad displays the ST2 error, and the response time of S2 signals
to cause the drive to stop outputting voltage should be ≤ 20 ms. Then restore the S2–DCM
voltage to 11–30 V
DC
. However, pressing RESET on the keypad cannot clear the STL2 error.
You must cycle the power to the drive. Make sure that the S1–DCM and S2–DCM voltage falls
between 11–30 V
DC
, and then cycle the power to the drive, then the STL2 error is cleared. The
drive should enter Standby mode and wait for RUN command.
5. If you can conduct these four steps normally in sequence with no other error, then the Safe
Torque Off function loop is normal, as shown in Table 6 below. However, if a situation that differs
from these four steps, or if STL3 occurs, then the Safe Torque Off function loop is not working
normally. Please refer to Section 15-7 Error Code and Troubleshooting Instructions.

Delta VFD4A2ME43ANNAA Specifications

General

Brand	Delta
Model	VFD4A2ME43ANNAA
Category	DC Drives
Language	English