Crawl - Siemens SIMOTRAS 6SG7050 Operating Instructions Manual

01.04
9.4.2

Crawl

See also Section 8, function diagram Sheet G130
The "Crawling" function can be activated in operating state 07 and, with "Operation enabled", in the
Run state.
The "Crawl" command is entered when one or several of the binectors selected in P440 switches to the
log. "1" state. A setpoint selected in parameter P441 is assigned to each binector. If the "Crawl"
command is entered via several binectors, the setpoint values are added (limited to ±200%).
Parameter P442 can be set to define for each possible crawl command source (binector) whether or
not the ramp-function generator must be bypassed. When the ramp generator is bypassed, it operates
with ramp-up/down times of 0.
Level / edge
P445 = 0: Level-triggered
Binector selected in P440 = 0: No crawl
Binector selected in P440 = 1: Crawl
P445 = 1: Edge-triggered
The input of "Crawl" is stored when the binector state changes from 0 → 1 (see Section 8,
Sheet 130). The binector selected in P444 must be in the log. "1" state at the same time.
The memory is reset when this binector switches to the log. "0" state.
Sequence of operations for entering Crawl command:
If "Crawl" is specified in operating condition o7, any "line contactor" used (if controlled via B0124) is
switched on and the crawling setpoint applied via the ramp-function generator.
If the "Crawl" command is entered in the "Run" state, the drive decelerates from the operating speed to
the crawling setpoint via the ramp-function generator.
Sequence of operations for cancellation of Crawling:
With "Crawling" active, but no "Switch-on" command applied:
If all bits which activate the "Crawling" function switch to log. "0", the controllers are disabled after
n < n is reached and any line contactor present is de-energized if controlled via B0124 (operating
min
state o7.0 or higher).
With "Crawling" active from "Run" operating state:
If all bits which activate the "Crawling" function switch to log. "0" and if the conditions for the "Run"
operating state are still fulfilled, then the drive accelerates from the set crawling speed to the operating
speed via the ramp-function generator.
See also Section 9.3.1 (Switch on / Shutdown) with regard to edge triggering and automatic re-start.
SIEMENS AG 6SG7000-0BA76
SIMOTRAS HD Operating Instructions
Function descriptions
9-13