86
Designation of master machine:
Important:
only one machine may be configured as the master on each loop. If the master machine has already been configured and you try to configure
the slave machine as the master, the slave machine
‟s parameter will be locked and not be accessible.
Parameter P808 sets the minimum time delay between the turning-on of machines 1 and 2.
22.1.1 Operating principle:
The master machine sends the following information to the slave machine:
- ON-OFF.
- Heating/cooling mode
- Control temperature.
The master machine will not have access to detailed information about the slave machine (fault details, operating readings, machine
parameters, operating parameters, etc.) and vice versa.
If a BMS is used, each machine will have access to all the information on the other machine.
Important:
The master machine
‟s BMS link manages information from the loop and the master machine. To obtain information on the slave machine, its
BMS link must be connected.
Loop description:
- The loop is limited to two units. Both may be assigned to the
loop
‟s operation or one may be assigned as a backup.
- The loop may be controlled in either heating or cooling mode.
Switching between modes is managed
in the same way as when a single machine is running (no
master/slave control).
- Each machine will be adjusted by its own software and the
adjustments made to the master machine will control the units on
the loop in cascade mode..
22.1.2 General:
In all cases, the slave machine
‟s On/Off button can be used to cut the master machine‟s control over the slave machine.
Once a machine is configured as the master, it has control over the slave machine.
The machine with the most control stages must always be designated as the master machine.
The slave machine
‟s control parameters become locked when P28 = Yes.
The time on the master machine
‟s console is sent to the slave machine so that both have the same time.
If communication between the master and slave machine is lost for more than 10 minutes, the slave machine switches to independent
operation with its own information and displays the following message:
Automatic acknowledgment:
- The automatic operation controls are managed by each machine as if the machines were not linked.
- Load shedding via the on/off inputs is managed by each machine as if the machines were not linked.
- The pumps are also managed by each machine as if the machines were not linked.
Parameters P801 to P810 are hidden if P800 = No (i.e. on the slave machine).
22.1.3 Management of the functions:
A) Machine operation priority and
b
alancing of runtimes:
- The order in which machines are started is determined based on faults and the number of hours of operation.
-
A machine is available
when it is off, has no faults, and is authorised to operated.
- The first machine to start is one that is available and has the fewest hours of operation.
Balancing of runtimes:
- After every 50 hours of machine operation, the system switches
to the machine which has operated the least in order to balance
the runtimes.
- While the system is on (and before it is shut off), compare the
time counters of the machines that are running and change the
order number so that the machine with the longest runtime is shut
off first.
- If a fault occurs on an active stage (or the stage is forced off),
stage
“n” becomes “n-1”.
- Stages are shut off in the reverse order that they were turned on
regardless of their number of hours of operation.
The total runtime of each machine calculated by adding P285 and
P286 on each machine.
B) Backup or auxiliary machine (P801 = Yes):
Without changeover:
The backup machine is designated by the customer (P803 = x).
WARNING:
In this configuration, the customer will have to run this machine twice a year to prevent the pump from seizing
.
With changeover:
- The machine with the longest runtime and which is off is
automatically set as the backup.
- If a partial fault occurs on a machine on the loop, that machine is
automatically made the backup.
- If parameter P807
0, the backup machine also serves as the
auxiliary machine. It is started up if the temperature >se
P807, and stopped at 1 K below this value.
The backup machine may operate if:
- A machine has a link fault
- A machine has a total fault
- Operation of backup authorised if P807
≠ 0 and temperature >
se P807
P 8 0 0
M A S T E R M A C H I N E
O N L O O P Y E S
M U L T I U N I T M A N A G E M E N T
L I N K F A U L T
Содержание Magister 2 Series
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