Siemens 6RA7086-6KS22 Operating Instructions Manual page 366

Function descriptions
Sequence of operations for shutting down drive:
1. Enter the "Shutdown" command (e.g. via terminal "Switch-on / shutdown")
2. Decelerate along ramp-function generator ramp
3. Wait until n < n
4. Output signal "Close holding or operating brake" (binector B0250 = 0)
5. Wait for brake closing time (P088) to run down
6. Input i
set
7. Ramp-function generator and n controller are disabled
8. The pulses are disabled when I = 0
9. The "Line contactor closed" relay drops out
10. The converter reaches operating state o7.0 or higher
11. Delay for field current reduction (P258) runs down
12. The field is reduced to a parameterizable value (P257)
Switch-on/Shutdown
Internal controller enable
Internal setpoint enable
n < n (P370,P371)
min
Actual speed
Brake control signal (B0255)
(holding brake)
Internal standstill
field input
− When n < n
prevents the drive from attempting to brake again if the motor is turned by external forces. The
n < n signal then disappears again.
min
− Changing the parameter setting between level and edge triggering affects the "Switch-on",
"Shutdown" and "Crawl" commands.
− The "Switch-on" and "Crawl" commands are applied alternately when edge triggering is selected,
i.e. a "Switch-on" edge at terminal 37 cancels a "Crawl" function triggered beforehand, and a
"Crawl" edge at a binector selected in P440 cancels an active "Switch-on" edge.
− The converter cannot be restarted automatically after a brief failure of the electronics power supply
when edge triggering is selected.
− In order to ensure that "Shutdown" still works after "rewiring of parameters", if lower current or
torque limits are applied or when additional setpoints are injected, certain functions are
automatically deactivated when the "Shutdown" command is entered.
All torque limits are made inoperative while the drive brakes down to n < n
limits, only the system current limit (P171 and P172), the speed-dependent current limit and the
limit derived from I
9-10
(P370, P371)
min
= 0
P087
P087 Brake release time (positive in this example)
P088 Brake closing time
P258 Delay for automatic field current reduction
(P370, P371) is reached for the first time, an internal interlock is activated which
min
2
t monitoring of the power section remain operative.
ON
Controller enabled
Setpoint enabled
n > n
min
Setpoint reached
Release brake
No standstill field
Shutdown
Controller disabled
Setpoint =0
n < n
Setpoint reached
Close brake
Sandstill field
P088 P258
. Of all the current
min
SIEMENS AG
SIMOREG DC Master Operating Instructions
05.05
min
6RX1700-0AD76