WEG SCA06 User Manual - page 56
7
Troubleshooting and Maintenance
7-2 | SCA06
7.3 TROUBLESHOOTING MOST COMMON PROBLEMS
Table 7.1: Troubleshooting most common problems
Problem
Item to be Checked
Corrective Action
Display will not turn
on
Control supply voltage (X5)
1. Check if the value is between 20 and 30 Vdc
2. Check if the polarity is correct
Differential circuit
breaker trips
Differential circuit breaker
1. Check if the circuit breaker tripping current is too low
RFI filter
1. Disconnect the RFI filter inside the servo drive by removing the screw
on the side of the SCA06.
Servomotor will not
spin
Wrong wiring
1. Check all the power and control connections. For example, the DIx
digital inputs programmed as enabling or external error must be
connected to +24 V.
Analog reference (if used)
1. Check if the external signal is properly connected
2. Check the state of the control potentiometer (if used)
Wrong programming
1. Check if the parameters have the right values for the application
Error
1. Check if the servo drive is not blocked due to a detected error condition
(see previous line).
2. Check if there is no short circuit between terminals X1:10 and 12 (short
circuit on the 24 Vdc supply).
Motor blocked
1. In the servomotors with brake option, check its supply
2. Check if the machine does not have mechanical problems
Motor speed varies
(oscillates)
Loose connection
1. Block servo drive, shut down supply and tighten all the connections
Defective reference potentiometer
1. Replace potentiometer
External analog reference variation
1. Identify cause of variation
Speed regulator gains too low
1. Review the setting of the speed regulator gains in real load condition
Motor speed too high
or too low
Wrong programming (servomotor
model and reference limits)
1. Check if the contents of P385 (servomotor model), P00121 (speed limit)
comply with the motor and application.
Reference control signal (if used)
1. Check the level of the reference control signal
2. Check programming (gains and offset) of analog inputs
Motor nameplate data
1. Check if the motor used is suitable for the application
Servomotor with
excessive vibration
Wrong programming (servomotor
model)
1. Check programming of P385
Speed regulator gains too high
1. Review the setting of the speed regulator gains in real load condition
Encoder simulation
output informing
pulses even with the
servomotor stopped
Wrong programming (servo drive
model)
1. Check the content of P385
Speed regulator gains too high
1. Decrease a little the speed regulator gains (review speed regulator
setting).
Real clock time
unadjusted
Battery
1. See
section 7.4 BATTERY REPLACEMENT on page 7-2
7.4 BATTERY REPLACEMENT
In order to replace the battery, remove the slot protecting cover 2 (or an accessory, according to
section 8.2
ACCESSORIES on page 8-2
) located in front of the servo drive and then turn and remove the battery cover. The
control of the SCA06 must be energized at the moment of installing the battery in the control card.
Battery consumption with the servo drive energized: 1.5 µA.
Battery consumption with the servo drive de-energized: 22 µA.
Battery approximate duration with the servo drive de-energized: 01 year
*.
* Consumption just for reference. For a precise estimate, contact the battery manufacturer.