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MC2-FC mode FC
Document no.:200064 Version: 1.5
Page 4 of 44
1 Functional specification
1.1 Introduction
The MC2-FC is a controller that can control, monitor and register the temperature, humidity and
ventilation of cooling and storage cells. The controller is very suitable for the control of fruit storage
cells, but it can also be used for many other control applications. There are 2 versions: a wall-mount
version and a panel-mount version, see sections 6.1 and 7.
The controller has Pt1000 temperature sensor inputs, digital inputs and relay outputs that are freely
configurable. The inputs are used to supply the controller with the measurements and external data
required for the control processes. The controller uses these inputs in combination with the control
settings (set points, parameters, etc.) to calculate the control values. The control values are
transmitted by means of relays to the processes to be controlled.
Multiple controllers can be connected to each other through a network (RS485 or Ethernet,
depending on the mode) so that they can exchange technical control data. In this way, they can be
combined to create an integrated control system with mutually coordinated control actions, while
retaining their autonomous operation in the event of network malfunctions.
The controller supports two modes: the mode FC (standard) and the mode MC. In the mode FC, the
controller functions in the same way as the FC785-PC controllers. The controller can work together
with FC785-PC controllers and other MC2-FC controllers through the RS485 Alfanet. In the mode FC,
has the controller the same parameters as the FC785-PC controller.
There are two difference between the MC2-FC in mode FC and the FC785-PC:
· The MC2-FC uses 2-conductor Pt1000 sensors instead of 3-conductor Pt100 sensors.
· The MC2-FC cannot be operated with the Alfanet PC program. Instead, the VDH Alfa Server
Program (VASP) is now available. That program can be used to operate both the MC2-FC
controllers and the FC785-PC controllers (from software version 2.10).
In the mode MC, the controller can work together with MC3-FRUIT and MC3-COOL controllers through
the Ethernet. This mode is described in another manual. It is possible to switch between the two
modes using an internal web page (see section 5.2).
The controller can be operated using the touchscreen. Remote operation is possible using the VASP.
VASP provides access to the advanced control functions such as registrations, alarm handling
settings, etc.