Siemens MICROMASTER 420 - Manual (Page 139)

Issue 07/04 3 Functions
MICROMASTER 420 Operating Instructions
6SE6400-5AA00-0BP0 139
3.20 Power module protection
3.20.1 General overload monitoring
Parameter range: P0640, r0067, r1242, P0210
Warnings A0501, A0502, A0503
Faults F0001, F0002, F0003
Function chart number: -
Just the same as for motor protection, MICROMASTER provides extensive
protection for the power components. This protection concept is also sub-divided
into 2 levels:
Warning and response
Fault and shutdown
Using this concept, a high utilization of the power module components can be
achieved without the drive inverter being immediately shut down. The power
module components are monitored as follows:
Table 3-26 General protection of the power components
Warning and response Fault and shutdown
Overcurrent / short circuit Imax controller for V/f
A0501
r0056 bit 09
r0056 bit 13
(refer to Section 3.21.1.2)
F0001
DC link overvoltage Vdc_max controller
A0502
(refer to Section 3.17.1)
F0002
The monitoring thresholds for the right-hand column in the table above are
permanently saved in the drive inverter and cannot be changed by the user. On the
other hand, the threshold levels for the "Warning and response" column can be
modified by the user to optimize the system. These values have default settings so
that the "Fault and shutdown" thresholds do not respond.