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• AY Anticycling
• NC Number of simultaneous devices
• TB Dry run time
• T1 Switch-off time after low pressure signal
• OD Type of system
• PR Remote pressure sensor
• PW Change password
Automatic alignment of sensitive parameters
When a multipump system is detected, the compatibility of the set parameters is checked. If the sensitive parameters are not aligned
among all the devices, a message appears on the display of each device asking whether you want to propagate the configuration of
that particular device to the whole system. If you accept, the sensitive parameters of the device on which you answered the question
will be distributed to all the devices in the chain. If there are configurations that are not compatible with the system, these devices are
not allowed to propagate their configuration. During normal operation, changing a sensitive parameter of a device results in the automatic
alignment of the parameter on all the other devices without asking for confirmation.
The automatic alignment of the sensitive parameters has no effect on all the other types of parameters. In the particular
case of inserting a device with factory settings in the chain (a device replacing an existing one or a device on which the
factory configuration has been restored), if the present configurations with the exception of the factory configurations are
compatible, the device with factory configuration automatically assumes the sensitive parameters of the chain
Parameters with optional alignment
These are parameters for which it is tolerated that they may not be aligned among the various devices. At each change of these
parameters, when you press or , you are asked if you want to propagate the change to the entire communication chain. In this
way, if all elements of the chain are the same, it avoids setting the same data on all the devices.
List of parameters with optional alignment:
• MS Measuring system
• AE Anti-blocking
• O2 Function output 2
• RM Maximum speed
14.3.6. First start of the multipump system
Make the hydraulic and electrical connections of the whole system as described in chapter 6.2 Plumbing and piping connection and 6.3
Electrical connection. Switch on the devices and create the associations as described in paragraph AS: Association of devices.
14.3.7. Multipump adjustment
When a multipump system is switched on, the addresses are automatically assigned and an algorithm selects one device as the
adjustment leader. The leader decides the speed and starting order of each device in the chain. The adjustment mode is sequential (the
devices start one at a time). When starting conditions occur, the first device starts, when it has reached maximum speed the next one
starts, and then the others in sequence. The starting order is not necessarily in ascending order according to the machine address, but
it depends on the working hours done, see ET: Max. switching time.
14.3.8. Assigning the starting order
Each time the system is switched on a starting order is associated with each device. Depending on this, the sequential starts of the
devices are decided. The starting order is modified during use as necessary by the following two algorithms.
• Reaching the maximum switching time.
• Reaching the maximum inactivity time
14.3.9. Maximum switching time
Depending on the parameter ET (maximum switching time), each device has a working time counter, and depending on this the starting
order is updated with the following algorithm:
• if at least half of the ET value has been exceeded, the priority is exchanged the first time the inverter switches off (exchange to
standby);
• if the ET value is reached without ever stopping, the inverter is switched off unconditionally and is taken to minimum restarting
priority (exchange during running).
If the parameter ET (Max. switching time) is set at 0, there is an exchange at each restart. See ET: Max. switching time.
14.3.10. Reaching the maximum inactivity time
The multipump system has an anti-stagnation algorithm, the aim of which is to keep the pumps in perfect working order and to maintain the
integrity of the pumped fluid. It works by allowing a rotation in the pumping order so as to make all the pumps supply at least one minute of
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