VDH MC2-FC User manual

Description:
MC2
-
FC mode FC
(software 181030 v3.00)
Pages:
44
Doc. no.
190236
Type:
Manual
By:
BVDB
Version:
1.5
File:
Do200064 MC2-FC mode FC V15 EN.docx
Initials:
Date:
28
-
02
-
2020
VDH Products BV
Manual
MC2-FC mode FC

MC2-FC mode FC Document no.:200064 Version: 1.5
Page 2of 44
Table of Contents
1Functional specification..............................................................................................................................4
1.1 Introduction...........................................................................................................................................4
1.2 Commissioning.....................................................................................................................................5
1.3 Phases and cooling..............................................................................................................................6
1.4 Heating...................................................................................................................................................6
1.5 Defrost....................................................................................................................................................7
1.6 Ventilation functions...........................................................................................................................8
1.7 Dehumidification..................................................................................................................................8
1.8 Humidification......................................................................................................................................8
1.9 Day/night mode....................................................................................................................................9
1.10 Set point link.........................................................................................................................................9
1.11 Blocking..................................................................................................................................................9
1.12 Alarms ....................................................................................................................................................9
1.13 Counters.................................................................................................................................................9
1.14 Sensor offsets.................................................................................................................................... 10
2Control ......................................................................................................................................................... 11
2.1 Cell name ............................................................................................................................................ 11
2.2 Touchscreen....................................................................................................................................... 12
2.2.1 Power-up page.......................................................................................................................... 14
2.2.2 Cell page 1.................................................................................................................................. 14
2.2.3 Cell page 2.................................................................................................................................. 15
2.2.4 Status page 1 and 2................................................................................................................. 15
2.2.5 Status page 3............................................................................................................................ 16
2.2.6 Settings page 1......................................................................................................................... 16
2.2.7 Settings page 2......................................................................................................................... 17
2.2.8 Parameter page........................................................................................................................ 17
2.2.9 Access code page..................................................................................................................... 18
2.2.10 Temperature set point page................................................................................................... 18
2.2.11 Day counters 1 page................................................................................................................ 19
2.2.12 Day counters 2 page................................................................................................................ 19

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2.2.13 Free-running counters page.................................................................................................. 20
2.2.14 Alarm pages............................................................................................................................... 20
3Parameters................................................................................................................................................. 21
4Alarms.......................................................................................................................................................... 28
5Ethernet....................................................................................................................................................... 29
5.1 Define IP address.............................................................................................................................. 29
5.2 Define mode....................................................................................................................................... 31
5.3 Define name....................................................................................................................................... 32
5.4 Displaying status inputs and outputs........................................................................................... 33
5.5 Parameter web page ........................................................................................................................ 34
6Connections................................................................................................................................................ 35
6.1 Controller............................................................................................................................................ 35
6.1.1 Wall-mount version.................................................................................................................. 36
6.1.2 Panel-mount version............................................................................................................... 37
6.2 RS485 connections........................................................................................................................... 38
6.3 Extension module 907.100054 MC3-EM [1Do12,1Rth16]....................................................... 39
7Dimensions................................................................................................................................................. 41
7.1 Controller wall-mount version........................................................................................................ 41
7.2 Controller panel-mount version..................................................................................................... 42
7.3 Extension module 907.100054 MC3-EM [1Do12,1Rth16]....................................................... 43

MC2-FC mode FC Document no.:200064 Version: 1.5
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1Functional 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 arefreely
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-FCcontrollers 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 controllercan worktogether 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 ispossible using the VASP.
VASP provides access to the advanced control functions such as registrations, alarm handling
settings, etc.

MC2-FC mode FC Document no.:200064 Version: 1.5
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The controller has 5 temperature sensor inputs (which can also be used as digital inputs) and 5
relays. If more inputs or relays are necessary, the controller can be expanded with an optional
907.100054 MC3-EM [1Do12,1Rth16] extension module. That adds 11 temperature sensor inputs
and 12 relays to the controller.
1.2 Commissioning
The following must be taken into account before the controller is commissioned:
·When the Ethernet connection is used, the IP address must be checked/defined (see section
5.1).
·The correct mode (FC or MC) must be selected (see section 5.2)
·The desired controller name must be defined (see section 5.3).
·The desired input and output functions must be defined with parameters (see section3, with
name parameters P1011..P116 and P951..P964).
·If the controller must work together with other controllers, the controllers must be linked to
each other through the RS485 network. Then a network number (P801) must be defined on
every controller.
·The other parameters must be checked/defined.
The software version number of the controller can be retrieved using parameter P991. To
ensure that multiple controllers can work together in a single network, it is recommended that
controllers with similar software versions are used. Controllers with different software versions
do not always work well together.
In addition, we strongly recommend that after a controller has been commissioned you
carefully note down the defined parameters and store them in a safe place. Then, if a controller
needs to be exchanged, that can be done much faster and more easily.
The functional operation of the controller is described in the following sections.
1In this user guide, parameters are indicated with P<x>, where x = the parameter number.

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1.3 Phases and cooling
The controller functions in 3 phases. These phases mainly relate to the control of the mechanical
cooling (fluid valve and a suction valve, where relevant).
Cool phase: In this phase, the cell starts mechanically cooling whenthecontrol temperature exceeds
the temperature set point + temperature differential. The cooling stops when the temperature set
point is reached. Cell cooling is only started if it doesn’t exceed the maximum total cooling capacity
of the cooling cells (P804). For that reason, the cooling capacity of every cell must be defined before
the cool phase (P803). Due to this maximisation, cells must sometimes wait until cooling capacity
becomes available.
Store phase: For the cells in this phase, a regular store cycle isrunning in which it is the turn of each
cell to cool mechanically once per cycle until the control temperature has reached the temperature
set point. It is possible to define the time between two successive cycles (P307). As many cells as
possible with a cooling demand will be started if this is permitted by the maximum number of cooling
cells in store phase (P308). The sequence in which the cells in the cycle start cooling is determined
by the network number.This uses asequence of ascending network number, but the network number
with which a cycle starts rotates every cycle. The first cycle starts, for example, with cell number 1,
the second cycle with cell number 2, and so on.
When a cell cannot be started – for example, because it is defrosting – there is a slight deviation
from the sequence. However, if a subsequentcellcan be started, it isindeed started toavoid the loss
of cooling capacity. The store phase is very suitable for controlling several cells with a limited
compressor capacity and a limited number of compressor starts.
Standby phase: In this phase, the cell only cools (mechanically) if that is required in order to deliver
hotgas to another cell that is waiting for a hotgas defrost action. The other functions of this cell
(defrost, heating, humidification and automatic ventilation) are blocked. This phase can be released
or blocked (P901).
1.4 Heating
The heating (Heating relay function) is switched on when the control temperature drops below the
current temperature set point - differential. The heating stops when the current temperature set
point has been reached.

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1.5 Defrost
The controller supports 3 defrost methods, which are described in detail below.
A defrost action can be started manually or on the basis of clock time intervalsor real-time intervals
(P810..P843). A defrost action only starts when the defrosting temperature is lower than the defrost
release temperature (P850).
Off-cycle defrost: During the defrost, the "Cooling ventilation" function of the evaporators is
switched on and the cooling is blocked. The defrost will stop automatically when the maximum
defrost time (P518) has elapsed. If there are multiple evaporators, theevaporators are defrosted at
the same time.
Electric defrost: During a defrost, the "Cooling ventilation" function of the evaporators remains
switched off. The defrost will stop automatically when the end-defrost temperature (P519) is
reached or the maximum defrost time (P518) has elapsed.After a defrost, adripoff takes place.After
an electric defrost, the ventilation can be released on the basis of the time and/or the temperature
(P521, P529, P530). If there are multiple evaporators, the evaporators are defrosted one after the
other.
Hotgas defrost: This defrost method requires one or more other cells (in the same sub-network)
that cool to supply hotgas. The number of cooling cells required for hotgas defrosting can be
configured(P524.).Whena cell is waiting for 15 for hotgas, other cells in the sequence ofdescending
cooling demand are forced to start cooling in order to supply hotgas. When two or more cells are
waiting for hotgas, the waiting time of 15 minutes is skipped.
During a defrost, the "Cooling ventilation" function of the evaporators remains switched off. The
defrost will stop automatically when the end-defrost temperature (P519) is reached or the
maximum defrost time (P518) has elapsed. Defrost will also stop if there is no more hotgas available.
After the defrost, the dripoff and a pumpdown take place. After a hotgas defrost, the ventilation can
be released on the basis of time and/or temperature (P521, P529, P530). If there are multiple
evaporators, the evaporators are defrosted one after the other.

MC2-FC mode FC Document no.:200064 Version: 1.5
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1.6 Ventilation functions
The controller supports 2 separate ventilation functions:
Cooling ventilation:This ventilation function is linked to an evaporator and used during cooling and
off-cycle defrosting. The function can be switched on and off automatically, but can also be
continuously switched on manually. This choice can be made with the cooling ventilation mode.
Automatic ventilation: This ventilation function is not linked to cooling. The function can be
switched on during real-time periods, on a pulse/pause basis, on a pulse/pause basis synchronised
with cooling or based on combinations of these options (P402..P412). Pulse/pause synchronised
with cooling means that: After a cooling action and the ventilation switch-off delay, the automatic
ventilation starts with a pause time.
1.7 Dehumidification
Dehumidification is performed by cooling (when the temperature is above the temperature set point)
and heating at the same time. Here it is assumed that the cooling has a larger capacity than the
heating. In this way, the temperature set point is ultimately reached.
The dehumidification can be manually started (continuously or with a run-off timer) with a
parameter (P382). An automatic start on the basis of a time interval and a dehumidification time
can also be defined (P380..P381).
1.8 Humidification
The controller supports 3 humidification modes:
Off: The humidification control is continuously disabled.
Continuous: The humidification control is continuously active.
Automatic: The humidification control is activated on the basis of advanced automatic
humidification timing settings, which include pulse/pause timing and synchronisation with cooling
and ventilation (P390..P398).
An overruling limitation provision can be used to limit the total humidification time in a time period:
A maximum humidification time in a blocking time can be configured (P393..P394).

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1.9 Day/night mode
The day/night mode is used to determine the temperature set points. The mode is automatically
switched on using parameters (P350..P351).
1.10 Set point link
The temperature set point can be linked to another cell (P805]. The controller then uses the same
temperature set point as the cell to which it is linked.
1.11 Blocking
If blocking is activated, all the control functions are stopped. Blocking can be activated during real-
time time periods (P701..P716) or with a digital input. If required, the blocking can be ignored for
automatic ventilation (P720).
1.12 Alarms
The controller has adjustable temperature alarms. Using parameters(P601..P618), it can be defined
for each phase how the alarms must function: absolutely and/or relatively compared to the current
set point, with which alarm delay and with which actions.
Using a digital input, an external alarm can be sent to the controller.
1.13 Counters
The controller has the following free-running counters. These counters can be read and manually
reset from the control.
·Cooling actions/pulses
·Cooling time
The controller has the following daycounters. These counters can be read using the controls and are
automatically reset at midnight.
·Cooling actions/pulses
·Cooling time
·Ventilation time (function "Cooling ventilation" or "Automatic ventilation" active)
·Cooling ventilation time (function "Cooling ventilation" active)
·Automatic ventilation time (function "Automatic ventilation" active)
·Humidification time

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1.14 Sensor offsets
The controller hasa sensor offset parameter for every sensor(P200..P216).It canbe used to correct
the indication by the inaccuracy ofthe sensor and (partly) the measurement circuit of the controller.
If the controller indicates too much for a temperature sensor – for example, 2˚C – the offset
parameter of that sensor must be lowered by 2 K.