1. DELCOS 3100 Electronics
37
1.7.10
Automatic restart after power failure
Danger
In this operating mode, the compressor can start
automatically at any time!
You can activate or deactivate automatic restart in the
[CONTROL MENU] (see Chapter 1.3.2).
After a power failure lasting no longer than approx.
2 seconds, the compressor is automatically restarted if
it was switched on, i.e. in operation (standby), before
voltage failed
Power failures lasting longer than 2 seconds produce
the [POWER LOSS] message and [AUTO RESTART]
does not take place.
The [POWER LOSS TIME] menu option (see Chapter
1.3.2) can be programmed to between 2 and 999
seconds.
In addition, you can also program a start-up delay of
1 to 60 seconds to ensure staggered start-up in the
case of multiple-compressor stations – to ease the
strain on the power supply system. The plaintext field
then shows:
[WARNING START IN xx s].
In remote-controlled operation, restarting also requires
the [REMOTE ON]. In timer-controlled operation, the
timer enable must be given.
1.7.11
Unlimited automatic restart after
power failure
The control system is able to conduct an automatic
restart after a power failure of any length.
For this purpose, you must have read the following
safety information and, by entering a code, enable
unlimited automatic restart.
Please request the required code from the Gardner
Denver customer service.
Danger
In this operating mode, the compressor can start
automatically at any time and after power failure of
unlimited duration. Check the safety regulations
applicable in your country (e.g. EN1012-1, EN60204)
to ascertain whether you are allowed to perform an
unlimited automatic restart and establish which
safety precautions must be taken.
At all events, provide the compressor with warning
signs, keep the compressor room locked and
instruct personnel.
Install the main switch prescribed under EN60204
and affix appropriate warning signs there.
This is how to enable unlimited automatic restart:
1. Press the code key
2. Enter the code
3. Press the key to accept the code you have set
After enabling, you can now also program the menu
option for max. failure time to [POWER LOSS TIME–s].
This corresponds to unlimited automatic restart.
Entering the code a second time withdraws enabling.
1.7.12
RS485 communication
DELCOS 3100’s serial interface provides the capability
of using two protocols. In addition, it is also possible to
set different baud rates (4800, 9600, 19200 baud) and
user addresses. These settings are made in the
[CONTROL MENU] menu.
The DELCOS protocol is used together with the
Gardner Denver profibus module. Using the profibus
module, DELCOS 3100 can be connected to a profibus
master (e.g. PLC).
Modbus interfaces and the associated drivers are
available for almost all well-known makes of
programmable logic controllers and PC visualisation
software.
