Emotron CDU/CDX 48-008 [47/82] Pointed arch drive

EMOTRON DSV 5445/5444

21.04.09  Emotron

Page 47

8.3 Pointed arch drive

1) The "Pointed arch 0E1A" flag is found in the FU-Control menu and/or in the EmoSoftLift or TER menu

mode. If this flag is set, pointed arch is activated. The lift program will behave in the usual manner at "0"

(this is the factory setting. But as soon as "255" is entered, a change from, for example, "V3" to "Ve",

leads to a "pointed arch drive". The braking distance covered during this is always the same from the

gear-down point onwards. This value is stored in cell 0E6C after the first run with "V3" and can then be

referred to there. This is very practical for systems with digital integral shaft copy, since one can now read

exactly this value for copying (the lift then makes a "direct approach").

2) You set the pointed arch drive with constant braking distance from the gear-down point on your DSV 544-

Lift in the following manner (applies also to the so-called direct approach from the gear-down point with

subsequent levelling correction INT2):

a) Adjust your lift data, if not already preset, in the usual manner. Enter a value in the variable for the over

speed threshold that is 1.15 to 1.20 times the value of drive step "V3" (i.e. a value of 1.85 m/s for threshold

0E16 for a max. drive step of 1.6 m/s).

b) Adjust variable 0E1A (enable pointed arch) to 255 or "true". Drive the lift past several stops with the

highest drive step "V3" and adjust a suitable braking behaviour using braking ramp "B" (0E18) (a value of

approx. 40 is recommended, giving an approximate braking distance of 2400 mm at 1.6 m/s or 1600 mm at 1

m/s for standard worm gears). You can inspect the braking distance in "mm" in variable 0E6C after a run with

"V3". The gear-down point that the lift controller specifies, may not be smaller than the distance in 0E6C,

otherwise the lift will overrun or will be halted too sharply during a direct approach (enter a value in the

controller that is approx. 5 % larger).

c) Now start a one-floor or short-stop run with "V3" If the pointed arch proceeds correctly, the lift will

approach just as cleanly as in the case of a run over several floors. If the lift takes a different non-permitted

path between full-speed and one-floor run, then the gear-down point is not coming with sufficient accuracy

(system dead-time). The "dead-time" can be adjusted in this case by altering the variable 0E16:

If "Ve" is reached too early during a one-floor run, the over speed value must be increased slightly; if the

approach is too short, reduce the value slightly. The DSV system always reaches the stop exactly, thanks to

the second correction in the levelling zone, even if the controller cannot give the upper gear-down point

exactly (dead-time is always allowed, but it should behave as constantly as possible).

d) The switchover to "Ve" ensures a direct approach from the gear-down point. The path that is stored in cell

0E6C of the DSV is always followed. If the "dead-time" is entered correctly using variable "0E16", the braking

distances of the digital shaft copy agree exactly with the value in 0E6C (in this case, the approach is

performed directly without a crawl stretch).

e) Please always leave the value for the "Ramp rate of rise" (0E20) at factory setting; It is also recommended

that the run up ramp "HL" and braking ramp "B" be set at the same value (e.g. both at 42) as this gives the

best results.

f) If the controller supports several drive steps, then the "pointed arch" will only take effect on “V3”.

g) Using DCP_03 or DCP_04 the default-settings of ’0E1A’ should be not changed in the file or inverter!