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12.2010
PNU
Description
The following situations can occur:
Determined voltage value < 145 V (lower limit in the characteristic diagram):
U578 = 145 V should be set.
The successful turn-off operation by the SIMOREG CCP is assured in all
situations, however, the voltage load (or torque increase) of the motor that
can briefly occur for a turn-off operation is higher than necessary.
Determined voltage value lies between the lower limit (145 V) and the upper
limit:
The voltage value determined should be set at U578.
The successful turn-off operation by the SIMOREG CCP is assured in all
situations.
Determined voltage value > upper limit:
Operation involving the basic converter - SIMOREG CCP combination is not
permissible. The successful turn-off operation by the SIMOREG CCP is not
assured.
This problem may be able to be resolved by contacting the manufacturer.
Note:
When communications are established between the basic converter and
SIMOREG CCP (P790=6), then the setpoint according to U578 in the
SIMOREG CCP is set using its operating firmware. If the selected setpoint
cannot be reached due to the fact that the actual line supply voltage is too
low, for operating states < 4.0, the basic converter outputs Alarm A032 -
followed by Fault F032 (fault value 3) - to signal that the required charge
voltage has not been achieved.
If, after commissioning, one of the relevant system parameters changes,
then the correct setting of U578 should be checked and, if required, it
should be appropriately set again.
U580
Control word for commutation monitoring
(2580)
Converter commutation is permanently monitored. Fault message F030 is
output when a commutation fault is detected and the SIMOREG CCP (if
being used) initiates that the thyristors are turned off.
Detecting a commutation fault is based on 3 criteria. Using this parameter,
these can be individually activated/deactivated for test purposes.
0:
None of the 3 decision-making criteria is evaluated
1:
Decision-making criterion 1 (adequate voltage-time integral for
the commutation) is evaluated
2:
Decision-making criterion 2 (curvature of the current cusp) is
evaluated
4:
Decision-making criterion 3 (magnitude of the current actual
value) is evaluated
Setting note:
Each decision-making criterion is coded using a number.
If several decision-making criteria are to be evaluated, then the sum of the
corresponding numbers should be set.
If U806 ≥ 2 (this means that the basic converter is a slave connected in
parallel), then decision-making criterion 1, is not evaluated independent of
the setting of U580.
U581
Diagnostics memory for the commutation monitoring [from SW 2.1 and
(2581)
higher]
This memory is updated each time that fault message F030 is output. It
includes more detailed information about the cause of the commutation
fault, which can be evaluated by Siemens experts.
Siemens AG
6RX1700-0DD74
SIMOREG DC-MASTER Converter Commutation Protector
Value range
[dimension]
Graduation
[from SW 2.1 and higher]
0 to 7
1
0 to 65536
1
Operating Instructions
Commissioning
No. of
See/
indices
change
Factory
(Access /
setting (FS)
state)
Type
Ind: None
P052 = 3
FS=7
P051 = 40
Type: O2
online
Ind: 68
P052 = 3
Type: O2
47
ENGLISH
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