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The unit allows for a motor PTC (thermal sensor) connection to the 2
nd
,3
rd
, or 4
th
temperature sender
input.
If the motor PTC sensor is connected to one of these inputs, the relevant sender input
’s Temperature
Sender Configuration must be set to
“Motor PTC”.
In this case, if the motor overheats and the motor PTC sensor measurement exceeds 2000 ohm,
Motor
PTC High Temperature
alarm occurs.
Multiple operation mode is designed for scenarios where multiple compressors are used in parallel.
Multiple operation mode conserves energy by running the minimum necessary number of compressors in
the group in low air consumption cases. This mode also ensures equal aging among compressors.
The unit allows up to 32 compressors to run in parallel.
Multiple operation is conducted via the CANBus port on the device, enabling communication between
compressors.
The devices are connected to the common
CANBUS
communication line. The CANBUS line must be
terminated by 120 Ohm resistor on both ends.
If the
CANBUS Address
parameter is set to a number up to and including 32, multiple operation mode is
activated. The same address can be assigned to devices in the same multiple operation group. In this
case, the devices automatically receive an address.
Operation of the System:
1. If communication between devices is broken, the devices continue running independently.
2. The youngest device becomes the master device and continuously runs according to
Stop Pressure
and
Start Pressure
. The other devices in the group run and stop according to their
engine hours
(age).
3. If any of the devices become younger than the master by
Master Change Timer
, the younger device
becomes the new master.
4. If any alarm occurs in the master device, another device becomes the master.
5. The master starts running immediately if the output pressure drops below
Start Pressure
. The other
devices in the group start running sequentially if the main pressure remains lower than
Start Pressure
in
ascending age order, each with a delay of
Slave Start Timer/16
.
6. If the output pressure is higher than
Start Pressure
but lower than
(Stop Pr Start
Pressure)/2,
the slave devices start running sequentially, each with a delay of
Slave Start Timer/4
.
7. As the output pressure approaches
Stop Pressure
, the slave devices stop running sequentially in
descending age order.
8. The number of slaves running on-load cannot be higher than
Max Number of Slaves Under Load
parameter. If the number of slave devices under load is greater than
Max Number of Slaves Under
Load
parameter, the lowest priority devices immediately stop running until the number of slave devices
running under load is equal to
Max Number of Slaves Under Load
parameter. If this parameter is set to
0,
Max Number of Slaves Under Load
check is disabled.
Devices with CANBUS Address parameter set to a number
greater than 32 are not included in the multiple operation group
and work independently.
21.11. MULTIPLE OPERATION
21.10. MOTOR PTC INPUT
