4-12 Operating the Drive
DC590+ Series DC Digital Drive
Step 7: Set the Speed Setpoint(s) to 5%
Set the Speed Setpoint(s) to 5% so that the value of the SPEED SETPOINT parameter is 5.0%.
This is also output at Terminal A8.
Step 8: Check the MAIN CURR LIMIT is zero
Double-check that the MAIN CURR. LIMIT is set to 0.00%.
Step 9: Start the Drive and check the field voltage
Apply the Start/Run command and check that 3-phase mains is applied to Power Terminals L1, L2 and L3.
Apply 24V to "Enable" (C5) and immediately check that the correct field voltage appears between the auxiliary supply terminals F+ and F-.
(Note that any external interlocks which affect the Enable input C5 will affect the operation of the drive.)
Caution
This is high voltage DC, proceed with caution. Do not continue if this is incorrect, switch off all supplies and check connections.
Refer to 9.1 or 9.2 on the next page.
If the field voltage is incorrect, make the following checks:
Step 9.1 Internally Supplied Field:
• Check that 3-phase is applied to terminals L1, L2 and L3 when the main contactor is closed.
• Check that the coding fuses on the power board or suppression board are healthy.
• The FIELD ENABLE parameter should be set to ENABLE.
• With the FIELD ENABLE parameter in view, press the (DOWN) key. The display changes to FLD CTRL
MODE. Press the M key. Is this set to VOLTAGE CONTROL or CURRENT CONTROL?
¾ If set to VOLTAGE CONTROL, check the value of the FLD. VOLTS RATIO parameter. Set this to 65% to
obtain 300V fields from 460V supplies.
¾ If set to CURRENT CONTROL, check the field current calibration set-up, refer back to “Calibration”.
If the field volts are at maximum, check the field continuity. (The field current may initially be lower than the rated value
due to a cold field.)
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