DMC SuperSigma2, Advanced Manual

Page: 33 / 97

SuperSigma2 AM PMS – V1.5.6 17-1-2020 Page 33 (97) ©2019 DMC GmbH Herten Germany
Situation 5: “ M3-2T Control Mode “Spd/Torq”” = 0 (Speed Control Mode) and “ M3-4T Hill hold ” Off/HH/S ””
=1 (Hill Hold)
In this case the controller acts to control the speed. Since hill hold is selected, the parameters
“ M1-19T Hill hold time
”HHTime”” , “ M1-20T Restraint hill hold speed ”HHspeed”” and “ M1-21T Restraint hill hold torque threshold ”HHTrqTH””
will be active.
The sequence of operation of the “end of braking” function is represented in the following figure.
End of braking in Speed Control Mode at the end of braking and hill hold enabled
The following list describes the “end of braking” steps:
1. t he speed decreases according to “ M1-8T Neutral brake ramp time “NBrkRamp”” (if neutral braking is happening)
or “ M1-14T Foot brake ramp time “FbrkRamp”” and the “Brake pot %” value (refer to “ M1-54T Brake pot
minimum “BrkMin”” and M1-55T Brake pot maximum “BrkMax”” ) (if foot brake is operated);
2. when speed is below setting “ M1-15T Speed threshold to enter end of braking mode ”SpdThEbM”” , the
controller reduces speed in a smooth way according to “ M1-16T Speed threshold Ramp time to zero speed
”SpdRmpTm”” ;
3. when speed is bel ow “ M1-18T Zero Speed Threshold to enter hill hold or neutral brake end ”ZSpdTh””, the
vehicle is held still until “ M1-19THil l hold time ”HHTime”” time is elapsed. The vehicle is kept still by means of
speed control algorithm;
4. when “ M1-19THil l hold time ”HHTime”” is elapsed, two situations are possible:
I. if the vehicle is on a slope it will roll (back or forward according to the slope) at “ M1-20T Restraint hill
hold speed ”HHspeed”” until level ground is detected, then it stops moving.
II. If the vehicle is already at level ground the vehicle is held still.
Level ground is detected when actual torque drops below “ M1-21T Restraint hill hold torque threshold
”HHTrqTH”” .
5. The controller keep pulsing until handbrake input (digital input 7) becomes active. Otherwise the controller never
stops pulsing until it is switched off! If digital input 7 is select as speed input 3 it never stops pulsing even if this
is activated.
•
VERY IMPORTANT: If the braking has been commanded by setting the direction switches to neutral
the step 3) of the above list use a different time. In other words the hill hold time is ignored and
the “ M1-9T Neutral brake- End delay “NBrkEnd”” time is used. After that time the vehicle will roll
on the slope at the restraint hill hold speed.
•
VERY IMPORTANT: Take care of consideration at step 5).