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MS-887VFD + A1000 control system

Cofa do poprzedniego slajdu przenosi do następnego slajdu

The control system is dedicated to rotary screw compressors with a motor power of up to 500 kW and uses a Yaskawa A1000 frequency converter. The system features, among others:

  • supervision of 2 x pressures, oil and motor temperature
  • network management of up to four compressors
  • calendar of individual, cyclical and network operation
  • separate lines of information about the status of all filters
  • 24V short circuit detection and protection
  • auto restart system and remote operation mode (REM)
  • multi-variant motor protection system
  • Y valve test and safety valve test

It has 6 programmable outputs to handle, among others: condensate drain, dryer, fan, oil heating.

This system is used to modernize fixed speed rotary compressors with a power of up to 500kW into variable speed compressors. The system uses a MIKROEL MS-887VFD controller and a Yaskawa A1000 series inverter selected depending on the rated motor power. Please contact MIKROEL when selecting a control system. We will verify whether a given compressor can be modernized to a variable-speed version and advise the optimal control system. 

Basic controller functions and parametersStatus / value
For compressors in the motor power range0 – 500 kW
Display size3,5”
Colour / monochrome displaycolor
Control of motors without a frequency inverter / with a frequency inverter– / ●
Measurement and control of pressure: main / network / pressure switch● / ● / –
Motor current control: asymmetry /current measurement/ on/off per hour● / ● / ●
Motor temperature control: Thermic / KTY-84 / PTC● / ● / ●
Oil temperature check PT-100 / PT-1000● / –
Operation: Condensate drain (DRAIN)/ Drier (DRYER) / Fan (VE) / Heater Mode1 (H1) or Mode2 (H2)● / ● / ● / ●
Support: ERROR / ACK output – Confirmation line output for REM remote operation● / ●
Oil (OF)/ Air (AF) / Separator (Sep) filter inspection● / ● / ●
AUTOTLSE automatic operation time optimization function●
Automatic restart function after voltage loss●
Network operation via Modbus (in modes: Auto, Const, Local) as: SLAVE / MASTER○ / ○
Remote operation mode (REM)●
Work calendar: scheduled individual, cyclical / network● / ●
Optional MS-Connect 2 visualization and diagnostics system–
Access control to the user / service menu● / ●
Y valve tests/safety valve test● / ●
Defined / programmable service counters6/2
List of recent events / critical errors / non-critical errors● / ● / ●
Saving / restoring controller settings● / ●
24V short circuit detection●
Language versionsPL, RUS, EN, DE

● the controller has this function
– the controller does not have this function
○ the controller can optionally have this function

The controller has two Modbus communication protocols. One port is used to operate the inverter, the other can support MS-Connect2 visualization and diagnostics system or network operation mode working as MASTER or SLAVE. The controller can also be managed remotely within the REM input as a slave controller. If network operation or MS-Connect2 visualization and diagnostics system is required for a compressor equipped with an inverter, the MS-887VFD controller should be selected regardless of the compressor motor power because it has two Modbus outputs. For details of the MS-Connect2 system, go to the “Visualization and Diagnostics Systems” product category.

Related products

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MS-Connect2 visualisation system