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1. Network operation of compressors
Solutions based on network operation of compressors are becoming increasingly popular in the industry. In order to reduce the intensity of compressor operation, time intervals are used in this equipment. In consequence, the functions of the compressor passing to idle status are taken up by another device. This secures continuous operation at reduced individual work load of each compressor and ensures energy savings due to more efficient allocation of working time to each machine.
Industrial controllers by MIKROEL allow cooperation in a sequential or cascade mode of networking. Networking is always managed by a master MSR controller. It can be either the Master controller (egMS4CMPXv2) dedicated specifically to this function ,or an industrial controller that implements the Master algorithm (eg MS585).
Depending on the model of the industrial controller, network operation can be carried out on the REM, RS485 or CAN lines. Modbus RTU protocol (on RS485 or CAN interface), implemented in newer MIKROEL industrial controllers, provides a detailed and fast data rate exchange between master and slave drivers. In case of REM, mode control of slave controllers is done by using REM line (switching compressor on / off ) and ACK line (acknowledged work line). Choosing the right networking configuration (interface and algorithm work) should be based primarily on the type of compressors used and on industrial controllers managing them.
Network operation algorithms:
2. Communication with PC's
Unattended operation of devices and thus their remote monitoring are now becoming increasingly important. Customers often are interested in an option of controlling operation of compressor or a group of compressors using a PC that is usually located away from the site in which the compressors are located. Industrial controllers by MIKROEL – thanks to their implemented transmission protocols - allow such communication using the following links:
Data exchange between PC and the driver is carried out by one of the converters:
We design and provide PC client applications - in order to enable such control. Currently we offer:
Our applications allow for:
The latest of MIKROEL industrial controllers employ the Modbus protocol for data transmission. It allows communication of industrial controllers with a PC application (eg MSAirControl visualization system) as well as communication between controllers themselves in a network mode. Depending on the model of industrial controller, a Modbus protocol can be based on either RS485 or CAN interface. The CAN bus is a network of multi-master type that allows simultaneous communication between controllers themselves and with the computer (see figure below). In addition, this interface allows very high data transmission rate that is remarkably immune to interference and errors.
RS485 bus is a single-master network type. In this type of network there can be only a one device initiating transmission (master). When connected as shown on below figure a master device will be a PC application and network mode operation can be performed on the auxiliary REM lines of REM managed by MS4CMPXv2 industrial controller.
Date Added: 07 marzec 2012