Eurotherm 590L Series, Руководство по эксплуатации продукта, Страница: 62 / 170

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If 5% speed (approx.) is exceeded and the motor continues to
accelerate a reversed connection is implied, decrease the MAIN
CURR.LIMIT parameter to zero.
11.1 Reversed Connections - Analog Tachogenerator:
Open the main contactor and switch off all supplies, then
correct the connections.
„ #
If the motor is turning in the correct direction, reverse the tachogenerator
connections only.
„ #
If the motor is turning in the wrong direction, reverse the field connections only.
11.2 Reversed Connections - MICROTACH/Encoder:
Open the main contactor.
„
If the motor is turning in the right direction, change over the
ENCODER SIGN parameter.
„
If the motor is turning in the wrong direction, switch off all
supplies then reverse the field connections only.
Re-connect the supplies if disconnected and repeat the test from the beginning.
If the motor still runs out of control, check the tachogenerator and the wiring continuity. In the
case of the MICROTACH there are three LED's on the MICROTACH option board, all these
LED's should be ON indicating healthy operation of the wiring and tacho. If in doubt about the
operation of the tachogenerator either Analog or MICROTACH during this test, monitor
terminal A4 with respect to signal ground on a meter. This will show if a feedback is present.
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Check the SPEED FBK SELECT. This could be set incorrectly
allowing the drive to run open loop.
If the motor does not turn at all when the MAIN CURR.LIMIT is
increased to 20%, check the CURRENT FEEDBACK parameter to
verify that current is flowing into the armature. If no current is
flowing, switch off and check the armature connections.
Is the motor connected to the converter?
„
Verify that calibration has been carried out correctly.
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If the drive has run satisfactorily without any need for reconnection of the field or
tachogenerator but the direction of rotation is wrong, open the main contactor and
disconnect all supplies.
12.1 Analog Tachogenerator:
Reverse both field and tachogenerator connections.
12.2 MICROTACH/Encoder:
Reverse the field, re-establish the auxiliary supply and
reverse the ENCODER SIGN parameter.
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4
SETUP PARAMETERS
5
CURRENT LOOP
MAIN CURR.LIMIT
00, # 0HQX # 0DS
4
SETUP PARAMETERS
5
SPEED LOOP
ENCODER SIGN
00, # 0HQX # 0DS
4
SETUP PARAMETERS
5
SPEED LOOP
SPEED FBK SELECT
00, # 0HQX # 0DS
4
DIAGNOSTICS
CURRENT FEEDBACK
00, # 0HQX # 0DS
4
SETUP PARAMETERS
5
SPEED LOOP
ENCODER SIGN