Operating Instructions

Table Of Contents
Siemens Industry, Inc. • 94 Siemens Application
24-hour support +1-800-877-7545 (Dial 2)
EXAMPLE:
In the auto-change sequence after the auto-change has taken place, the motor with the highest priority
is placed last and the others are moved up by one place:
Starting order/priority of motors: 1->2->3->4->5
--> Autochange -->
Starting order/priority of motors: 2->3->4->5->1
--> Autochange -->
Starting order/priority of motors: 3->4->5->1->2
3.7 Application - Fault tracing
When the drive control diagnostics detect an unusual operating condition, the drive initiates a visible no-
tification on the keypad. The keypad will show the code, the name and a short description of the fault or
alarm.
Notifications vary in consequence and required action. Faults make the drive stop and require a reset of
the drive. Alarms inform of unusual operating conditions, but the drive will continue to run. Infos may re-
quire resetting but do not affect the drive’s operation.
For some faults, you can program different responses in the application. See parameter group Protec-
tions.
The fault can be reset with the Reset button on the control keypad or via the I/O terminal. The faults are
stored in the Fault history menu which can be browsed. You will find the fault codes in the table below.
NOTE: When contacting Siemens because of a fault condition, always note the texts and codes
on the keypad display.
1 Enabled
The priority is changed at certain intervals to get an equal wear
on all motors. The intervals of the auto-change can be changed
(P3.14.5). You can also set a limit for how many motors are
allowed to run (P3.14.7)
as well as
for
the
maximum frequency
of the regulating drive
when
the auto-change is done (P3.14.6).
If the auto-change interval P3.14.5) has expired, but the fre-
quency and motor limits are not fulfilled, the auto-change will be
postponed until all conditions are met (this is to avoid for exam-
ple sudden pressure drops while the system is performing an
auto-change when there is a high capacity demand at a pump
station.
Selection Selection name Description