M O T I O N
Counting Method “02” - Pulse Counting.
Refer to the following explanation and “Counting Method 02 Shaft Layout” diagram;
If the fast speed slowdown distance for level 1 exceeds the distance from level 2 to level 1, BSL would need to be
placed above level 2. This creates a problem, as the lift would reset to level 1, when on level 2.
In this case, the extra limit switch, BSL-2 must be installed
and MSL set to 02.
BSL-2 is wired in series with the DF relay contact, to ensure the DF input to the drive is lost when approaching
level 1 on fast speed or when a correction run is being performed.
BSL-2 limit switch should switch approx 50mm below the down fast slowdown point.
The normal BSL limit switch (wired to BSL input) is placed between levels 1 and 2 for position correction.
In this case, the lift cannot perform a fast speed (DF) run from level 2 down to level 1, so the medium or
intermediate speed (SP2 relay) would be selected.
MSL = 02 ensures the loss of BSL input shall drop the SP2 intermediate speed relay.
Nb: When MSL = 01
loss of BSL input does not drop SP2
BSL limit switch (wired to BSL input) should be approx 50mm below the down intermediate speed slowdown
point.
BSL must remain activated all the way down to the car being on the buffer.
BSL-2 limit switch (wired in series with DF) must remain activated, at least, until BSL limit becomes activated.
The same applies for the TSL and TSL-2 limit switches, except in the up direction;
TSL limit switch (wired to TSL input) should be approx 50mm below the up intermediate speed slowdown point.
TSL must remain activated all the way up, to the point where the counterweight is landed.
TSL-2 limit switch (wired in series with UF) must remain activated, at least, until TSL limit becomes activated.
