VDH MC 885-SDHL, Manual, Page: 5 / 10

No.
Description
Range
Per
Unit
Default
80
81
82
83
Temperature in top display
1 = Room temperature
2 = Channel temperature (room temperature if P02 = 0)
3 = Lowest sensor temperature
4 = Highest sensor temperature
5 = Average sensor temperature
6 = Control temperature
Controller delay after power interruption
Reset alarm relay after alarm reset
(0 = no, 1 = yes)
(without the cause of the alarm being removed)
Buzzer on at alarm (0 = no, 1 = yes
1 6
0 to 99
0 1
0 1 -
1
-
- -
min
-
- 1
0
0
0
85
86
Operate password
(0 = no password)
Parameter password (0 = same as operate password)
0 9999
0 9999
1
1
-
-
0
0
90
91
Network number
Login interval
1 250
1 120
1
1
-
min
1
5
95
98
99
Software version
Serial number
Production date
(year/week)
1.00 ..
99.99
0 9999
00.01 ..
99.52
-
-
-
-
-
-
-
-
-
* Adjusting sensors
The sensors are adjusted using the sensor offset parameters (P111 and P121). If, for example, the
thermostat indicates 2.5

C too high for a sensor, then the sensor offset parameter will have to be reduced
by 2.5

C.
* Basic regulation function
The basic control is set using parameters P01..04, P20..37 and P40..42:
- A single mode (/setpoint) or 2 modes (/setpoints) (P01)
- Only a room temperature or a channel temperature sensor (P02)
- Control temperature for mode S (and for single mode) (P03)
- Control temperature for mode D (P04)
The basic control supports 3 adjustment functions:
>
Burner on
=
,
>
burner low
=
and
>
burner high
=
. This is shown
in the functional flow figure. The
>
active setpoint
=
is determined by the active mode (mode S or D). The
>
active control temperature
=
is the control temperature for the active mode as set using parameters P03 and
P04.
The control settings for these control functions are set using parameters P20..37.
If modulating control is set for a control function, the control function modulating with an adjustable (fixed)
duty cycle and an adjustable (fixed) cycle time will be indicated in the situations shown in the figure
>
on
=
.
This modulating control can, for example, be used for a capacity/power setting.
A control function can be selected for each individual relay using parameters P40..42.