6.2.6 – LLL2 – LL–3 – One duplex column with mixed time / volume start.
6.2.6.a – Operative characteristics.
In this operative modality the control for the start of the regeneration depends on the use or otherwise of the cam with
stand-by, that is of the programming of the flags 1CL and 2CL.
If both of the flags are programmed with the value 0, the regeneration cycle is standard in 4 phases of 25 seconds. The
start of the cycle is controlled by the running out of the interval time between two regenerations, or by the running out
of the volume. The latter condition, differently from that described in par. 6.2.3.a, does not activate a request for
regeneration to be carried out at the programmed time, but causes the immediate start of the cycle.
The same effect is obtained also by programming to 1 only the flag 2CL, that is when the standard regeneration cycle
standard with a stand-by cam is required to be carried out.
If both of the flags are programmed with the value 1, the controller carries out the regeneration with stand-by. In this
case, the running out of the volume causes a request for regeneration which will be carried out at the programmed time.
The controller will immediately position the cam in the stand-by position, that is it will carry out the exchange of the
columns. The regeneration will start from the stand-by position.
The control on the reserve is not available.
The control on the remote start is available, and this can start up the regeneration both immediately and deferred to the
programmed time, on the basis of the content of the flag 2HL.
6.2.6.b – Programming of the FLAGs
Tab. 20 is to be used for the programming of the flags for the modality LLL2 – LL-3
Tab. 20 – Selection of the operative modality duplex column - start in mixed mode