Siemens SIMOTRAS 6SG7050, Руководство по эксплуатации

Страница: 317 / 604

01.04 Function descriptions
SIEMENS AG 6SG7000-0BA76
9-19
SIMOTRAS HD Operating Instructions
D component in actual value channel or setpoint/actual value deviation channel
As a basis for selecting the correct derivative action time, it is necessary to calculate the maximum
possible rate of rise at the derivative action element input, i.e. the period of time required by the input
signal to change from 0 to 100% at this maximum rate of rise. The derivative action time should
preferably be set to a shorter value than this period.
9.7 Switch on auxiliaries
The function acts as a switch-on command for auxiliaries (e.g. motor fan).
The "Switch on auxiliaries" signal is available at binector B0251 and inverted on B0256:
B0251 log. "0" state = Auxiliaries OFF
log. "1" state = Auxiliaries ON
To act as the auxiliaries drive signal, this binector must be "wired up" to a binary output, e.g. by setting
P771 to 252 for connection to output terminals 46 / 47 (see Section 8, Sheet G112, for other possible
settings).
The "Switch on auxiliaries" signal switches to "high" at the same time as the "Switch on" command.
The converter then waits in operating state o6.0 for a parameterizable delay period (P093). Any “line
contactor” used will then be activated if controlled via B0124
When the "Shutdown" command is entered, the firing pulses are disabled when n < n
min
is reached and
any line contactor used drops out (if controlled via B0124). The "Switch on auxiliaries" signal switches
to "low" after a parameterizable delay period (P094). However, if the "Switch on" command is entered
again before this delay has expired, then the converter does not stay in operating state o6.0, but any
line contactor used is closed immediately instead (if controlled via B0124).