Manual R2000-43-E Release: 1.03 © Elotech GmbH Page 17/24
Display
Parameter
Display
"Process"
„Set“
Softstart-function
TAKE CARE:
If you take the softstart-function, make sure that the heating control outputs are
equipped with bistable voltage (logic) outputs.
This function is not allowed for instruments with relay-outputs
(in this case set So.St = OFF).
Otherwise the relais will be destroid becuse they switch too fast.
Softstart (general function):
During the softstart the controllers’ heating output response is limited to a pre-selected ratio, in order
to achieve a slow baking out of high performance heat cartridges.
Simultaneously the output clock frequency is quadrupled. Once the process value reaches
the softstart setpoint, it remains stable at this value for a pre-selcted hold-duration time.
At the end of this period the process value rises to the valid setpoint.
This results in a slower, more regular heating period.
For this purpose the bistable voltage output must be taken, that actuates SSR relays.
If the softstart is active, the controllers’ autotune function can’t operated (Er.OP).
If a setpoint-ramp has been programmed, the softstart has priority, and the ramp will only
become active after the softstart has been completed.
The softstart only works,
- if the parameter „1 P“ (prop. band, xp) is programmed > 0,1%.
- if the actual process value is lower than So.SP – 5% of the selected measuring range.
It is possible, to select this function for each zone individally.
Setpoint SP
So.SP
Softstart setpoint
So. Y
So.ti
t
So.St
Softstart-function
OFF:
Softstart not active (ex works)
Next parameter So.Y, So.SP, So.ti are not shown.
On:
Softstart in action.
The softstart function always runs, if the controller is switched on and / or
if the actual temperature is below the softstart setpoint So.SP minus 5%
of the range (e.g. range: 400^C -> 5%= 20°C).
So. Y
Softstart output ratio
10 ... 100%
So.SP
Softstart setpoint
range: SP.Lo .... SP.Hi
So.ti
Softstart duration time
OFF; 0,1 ... 10,0 min.
