VDH ALFA 801, ALFANET 801 User Manual
1
User manual
ALFA 801 and ALFANET 801
Pulse/pause Timer-unit
VDH doc. 060344 Version: v1.0 Date: 02-02-2006
Software: ALFA 801 Flash File: Do060344.wpd Range: 0-999
* Operation.
The ALFA(NET) 801 is a panel mounting timer-unit, with a pulse/pause relay function. The pulse and
pause time are set by parameters (P01 and P02). The timer-unit has a range from 0-999 minutes or
seconds (P03). The timer-unit has also a contact-input for starting the unit with pulse or pause (P05).
The ALFANET
801 is provided with a RS 485 network connection, to readout or set the unit on the PC
with ALFANET software. by using a ALFANET PC-Interface.
* Installation.
On the topside of the ALFA(NET) 801 can be read how to connect this unit, such as powersupply,
relay-output, contact input and network.
After power up the ALFA(NET) 801 and the self test is finished the unit displays the pulse or pause
time. As the output relay is activated the LED 'on' in the display lits to indicate this.
* Control.
The ALFA(NET) 801 Timer-unit can by controlled by three pushbuttons on the front. These keys are:
[] SET - view / change setting.
[] UP - increase setting.
[] DOWN - decrease setting.
* Changing current pulse/pause time.
Push the SET key, the LED ‘set’ starts blinking. Release the SET key. Now push the SET key again
and together with the UP or DOWN keys the current pulse or pause time can by changed. A few
seconds after releasing the keys the timer-unit returns to it’s normal operation, the LED ‘set’ switches
off.
2
* Setting internal parameters.
By pushing the DOWN key for more then 10 seconds, you enter the ‘internal programming menu’. In
the left display the upper and lower segments are blinking. With the UP and DOWN keys the required
parameter can be selected (see parameter table).
If the required parameter is selected, the value can by read-out by pushing the SET key. By pushing
simultaneously the SET key and the UP or DOWN key the parameter value can be changed.
If no key is pushed for 20 seconds, the ALFA(NET) 801 will return to it’s normal operation and the
changes are saved.
* Parameters ALFA 801.
Parameter
Description Parameter Range Default
value
01
02
Pulse time
Pause time
0...999
0...999
10
50
03 Unit of parameter 01 and 02 0 = minutes,
1 = seconds
0
04 Start with pause after power failure 0 = no, 1 = yes 0
05 Contact-input mode
0 = Not active.
1 = Start with pulse-time at closing the input.
As long as the input is closed pulse will be
active.
2 = Start with pause-time at closing the input.
As long as the input is closed pause will be
active.
3 = At input impulse start pulse-time
4 = At input impulse start pause-time
0...4 0
90
95
96
97
98
99
Network number (only at ALFANET 801)
Software version
Production year
Production week
Serial number (x 1000)
Serial number (units)
1...250
-
00...99
1...52
0...250
0...999
1
-
-
-
-
-
Remark: In case that the timer-unit is set on minutes (P01= 0), the display shows the last minute of
the current rest time in seconds. To indicate this, the lower segment of the first digit is lit and
the other digits show the time in seconds.
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