Functions, monitoring, and protective functions
9.2 Drive functions
Inverter chassis units
Operating Instructions, 07/2016, A5E00331449A
439
p7769}0...20]
KHP memory card reference serial number
r7843[0...20]
Memory card serial number
KHP: Know-how protection (know-how protection)
Essential service mode
Description
E
ssential
ervice
ode (ESM) enables the the drive to be operated for as long as possible if
needed, even when errors occur.
For instance, this function can be used in applications in which an undesirable standstill can
cause significant subsequent damage.
For example, if a fire breaks out in a large building, a fan should extract smoke and other
gases so that people can be evacuated.
● In essential service mode, the automatic restart function is activated irrespective of the
setting of parameter p1210. The result of this is that the drive is automatically switched
back on if an OFF2 occurs due to an internal fault.
● In essential service mode, converter shutdown due to faults is suppressed. Exceptions to
this rule are faults that would lead to the destruction of the device.
● Essential service mode is triggered by a continuous signal via the digital input, which is
set as a signal source via p3880.
● If the drive is in bypass mode when essential service mode is activated, the motor will
automatically switch over to converter operation. In this case, there is no back
synchronization to the converter, i.e. the "Flying restart" function must be activated
(p1200 = 1).
● When essential service mode ends, the converter returns to normal operation and
responds according to the currently pending commands and setpoints.
To Next Page
Loading...
