Efficient control of compressor operation not only improves production efficiency but also becomes more important in terms of energy-saving and labour-saving.
When faced with such a demand, please choose a number controller (Multiroller EX) that can efficiently control multiple compressors. Smaller, lighter and more functional than older models.
System Features
About 25% of energy-saving through multiple compressor control
Complete variety
In addition to the intensive type that can control 4/8/12 compressors, there is also a built-in compressor type.
Equipped with LCD touch screen, easy to monitor and operate
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Operational status at a glance
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The composition of the picture is clear and clear
Three control modes
Easily realize the combination of multiple variable speed machines and multiple fixed speed machines
Detailed and sensitive predictive pressure control
Multiple Controls Emphasizing Preventive Maintenance
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Schedule operation (second pressure can also be set)
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Manage the history of faults and alarms
Can also control external devices
Auxiliary equipment such as air dryers, cooling water pumps, and oil filters can also be controlled to further exert an energy-saving effect. (Optional support is available)
System Components
There are two methods: traditional intensive type and RS485 connection for communication control (embedded type).
Style 1 Intensive (External)
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HISCREW2000 series (except V type) do not require compressor modification.
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Also applies to the already set HISCREW, DSP.
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Up to 12 (total) compressors can be added via RS-485 multiplexing.
Style 2 Embedded
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Using RS-485 multi-channel connection, the field wiring is very convenient.
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3 to 12 (total) compressors can be added.
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Compressor built-in type eliminates the need for installation space in a control cabinet.
The main function
At-a-glance, easy-to-use LCD touch screen
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Operational operations and various settings can be easily performed through a conversational interface.
Weekly schedule operation function
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It is possible to set a schedule for the operation of multiple controllers within a week.
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After setting the 2nd pressure, different pressures can be used on different days and time periods to save energy.
Three control modes
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Among them, the 2-loop control mode can be easily combined with the V-type machine.
Rotary control |
2-loop control |
Rotary control. |
Example: 4 fixed-speed compressors
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Example: 2 variable speed compressors and three fixed-speed compressors
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Example: 3 fixed-speed compressors with different displacements (rotary control is limited to fixed-speed compressors)
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Pressure Predictive Control Function (Patent No.: 3404492)
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Calculate the pressure drop speed, predict the pressure's starting point, and start the compressor in advance to control the pressure drop before the pressure drops to the lower limit value. (This function is only valid when the fixed speed compressor is combined.)
Traditional Pressure Control |
Pressure Predictive Control |
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Collect the pressure drop rate to predict the pressure after starting and unloading ↓
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Prevent pressure from falling below the lower limit.
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Standard
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*1
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Applicable models of compressor built-in Multiroller EX (built-in main unit): HISCREW2000S/M model with 55kW or more, NEW DSP with 75kW or more (except V model).
System Selection Considerations
About the operation of the compressor
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When the Multiroller EX is set to "Restart after power failure", the multi-unit control will be restarted after the power is restored. The compressor will be commanded to operate. Therefore, when performing maintenance on the compressor, be sure to set the compressor separately and turn off the circuit breaker before starting the operation.
about electrical
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When combined with a DSP-V compressor, the DSP-V and Multiroller EX must use the same power supply system to ensure that both power supplies are turned off at the same time in the event of a sudden power failure.
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It is recommended to use the same power system for the compressor and Multiroller EX, with separate circuit breakers set up and connected.
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To prevent malfunction, use shielded cables for the AC and DC cables of the compact Multiroller EX, and use twisted-pair communication cables for the compressor-embedded Multiroller EX.
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The grounding of each compressor and Multiroller EX should be reliable, especially the grounding wire of the V-type compressor should be connected to the grounding separately from other grounding wires.
About applicable compressors
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The PQ wide-range mode function of Vplus will not be available (as of March 2005).