SMCW6150 Datasheet, PDF (3/16 Pages) celduc-relais – Solid State Relays For Motor Control

celduc^®
relais
Solid State Relays
For Motor Control
S/MOT/SMCW6150/A/22/07/99
1W240020
Page 3/16
SETTINGS AND DIAGNOSTIC
DESCRIPTION OF THE DIAGNOSTIC INFORMATION IN NORMAL OPERATION
Visualization
Status
Outputs
Motor
Cause probable
Supply Line Load Byp. Diag.
Stopped
Stopped
Starting
Running to
nominal
speed
Decelerating
No mains or device not correctly wired
Mains voltage and phases OK, Motor detected,
No control
Mains voltage and phases OK, Motor detected,
Control detected and beginning of the softstarting ramp
Mains voltage and phases OK, Motor detected,
Control detected and end of the softstarting ramp
Mains voltage and phases OK, Motor detected,
No control and beginning of the softstopping ramp
Visualization
Supply Line Load
Status
Outputs
Byp. Diag.
DIAGNOSTICS IN CASE OF FAILURE
Motor
Possible Cause
Solution
Stopped
Mains voltage too low
Check the phases 3L2 and 5L3
Stopped
Running
Stopped
Stopped
Phase(s) missing,
Mains frequency out of range,
Too much interference
Check the phases
Phase(s) missing
Check the phases
Load missing,
Short-circuited thyristor
Bypass missing (its checking is
required by the corresponding option)
Check the motor connections and the
solid state switches
Check the bypass connections or if not
used, cancel the checking option
Stopped
Stopped
Stopped
Stopped
The solid state switches can not close
Microcontroller malfunction
A problem occurred on the mains (no
voltage or a phase missing, …)
then disappeared
but the control voltage was applied
A problem occurred on the load
(temporary disconnection,…)
then disappeared
but the control voltage was applied
Check if the connection between 5 and
6 of the control terminal block is
correctly done. Check as well if the
load current is sufficient.
Disconnect the softstarter from the
mains for a while
Remove the control for a while
Remove the control for a while
LEGEND
Off
Green
Red
Flashing
off/green
Flashing
Off/red
IMPORTANT INFORMATION ABOUT THE DIAGNOSTIC
1- The device makes a complete diagnostic (mains, load and itself) since it has enough supply voltage (On the mains or on the control side).
2- The device only checks the presence of the phases and the closing of the solid state switches during the voltage ramps (Softstart and
softstop) and during the full on state period.
3- The control overrides the diagnostic.
- If a problem occurs during the control period, the device will close all the solid state switches. If the problem goes on during
the full on state period, the corresponding information will be given to the user according to the table above.
- Likewise, if a problem occurs during the softstopping period, the device will stop immediately in order to reach the off state
diagnostic period.
4- On a hard stop (no softstop) and case of driving a large motor, the device may temporary display a problem concerning the mains. This is
due to an important residual voltage across the motor windings (Back EMF generated by the motor rotation and the remaining magnetic
field). This security allows the user to avoid connecting the motor to the mains in bad conditions. This phenomenon can be cancelled by
using the softstop feature that slowly reduces the remanent magnetic field inside the motor. This allows as well to avoid overvoltage
across the solid state switches (increasing the lifetime expectancy of the integrated varistors). Therefore, softstop is recommended even
with high inertia motor loads.