User Guide
MCX-RTU
Rooftop unit
User Guide | MCX-RTU Rooftop
Contents
Document history ........................................................................3
Product Introduction...................................................................3
Ordering .......................................................................................3
Specifications ...............................................................................4
Approvals .....................................................................................4
Installation ...................................................................................5
Connections .................................................................................6
Network Topology .......................................................................8
Sequence of Operation ...............................................................9
Cooling Mode ..................................................................................... 9
Heating Mode ...................................................................................10
Dehumidification Mode................................................................10
CO2 Mode ..........................................................................................11
DOAS Mode ....................................................................................... 11
Status Screens ............................................................................12
Configuration .............................................................................14
Overrides ....................................................................................24
Schedule Enable ........................................................................25
How it works .....................................................................................25
Backup / Restore ........................................................................26
Purpose ............................................................................................... 26
How it works .....................................................................................26
Using More Than One Zone Sensor ..........................................26
Data Logging .............................................................................27
How it works .....................................................................................27
Broadcast Configuration ...........................................................28
How it works .....................................................................................28
Configure Sensors ...........................................................................28
Configure Schedules ......................................................................28
Configure Load Shed .....................................................................28
AK-SM 800 MCX-RTU Commission ...........................................29
IO List ..........................................................................................34
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Document history
Product Introduction
Version Init. Date Description
1.00 FF 12/01/15 Initial MCX-RTU User Guide
1.04 FF 7/31/2018 Firmware v1.04 Update
Ordering
The MCX-RTU controller is a complete solution for controlling a small to medium sized commercial rooftop unit. The controller provides energy efficient control of the rooftop while maintaining designed comfort levels and safety of the controlled space. It is also designed to complement the Danfoss full store control via the connection to the AK-SM 800 series front end.
Type Function Application Code no.
MCX-RTU Controller for small to medium sized
rooftops
MCX08M2 Optional additional IO for MCX-RTU IO Expansion 080G0307
MMIGRS2 Optional Remote Display Remote Display 080G0294
Rooftop Controller 080G0304
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User Guide | MCX-RTU Rooftop
Specifications
Supply Voltage
85 – 265 V AC, 50/60 Hz Maximum power consumption: 27 W, 48 VA insulation between power
supply and the extra-low voltage: reinforced
Modbus
It is important that the installation of the data communication cable be installed correctly.
Remember to terminate each end of the bus. EIA485 Rated cable must be used.
See separate literature No. RC8AC902.
DO - Digital outputs, 15 pcs. DO1 – DO15
DO1 - DO15, all are mechanical relays, no solid state relays
AO - Analog output, 6 pcs. AO1 – AO6
Outputs are 0 – 10 V DC by default
AI - Analog Inputs, 14 pcs. AI1 – AI14
All temperature sensors default to PT1000, Pressure transducers default to .5 – 4.5 V DC
ratiometric with 5 V DC supply. All other inputs are 0 – 5 V DC by default
DI - Digital switch inputs DI1 – DI17
All Dry contacts except DI17 (24 V AC or 230 V AC driven)
AK-SM 800 Firmware required to interface with the MCX-RTU must be VG8.033 or greater and
StoreView Desktop version 1.13 or greater must be used for remote access.
Approvals
EU Declaration of Conformity
This product is in conformity with the following directive(s), standard(s) or other normative
document(s), provided that the product is used in accordance with our instructions.
EMC directive 2014/30/EU
By fulfilling the requirements in the following standards
EN 61000-6-4: 2007 + A1: 2011 Generic standards. Emissions standard for industrial environments
EN 61000-6-2: 2005 Generic standards. Immunity for industrial environments
and
LVD directive 2014/35/EU
By fulfilling the requirements in the following standards
EN60730-1: 2011 Automatic electrical controls for household and similar use. General
requirements
EN60730-2-9: 2010 Particular Requirements for Temperature Sensing Controls
and
RoHS Directive 2011/65/EU
By fulfilling the requirements in the following standards
EN 50581:2012
UL Approval
UL file: E31024
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110
60
Danfoss
80G8044.01
Installation
The MCX-RTU is mounted on a DIN rail with enough room to easily connect power and other
interface wires.
This image provides the dimensions of the MCX-RTU controller for determining space for
mounting. Make sure that you allow enough space for easy routing of the required interface
cables for power, inputs and outputs.
280
63
The MCX-RTU must be mounted in a space that meets the environmental standards named in
the specification section of this document.
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Connections
Wiring Diagram MCX 152V - top and bottom
COM 1
AK-SM 800
Modbus connection
VLT Drive
Modbus connection
D1 +
D1 -
COM 2
D2 +
D2 -
RS485-1
RS485-2
MCX152V - TOP
MOTOR 2
MOTOR 1
STEPPER
STEPPER
ST2 4
ST2 3
ST2 2
ST2 1
ST1 4
ST1 3
ST1 2
ST1 1
Not used
Mixed Air (PT1000)
Outdoor Temp (PT1000)
Light Level (5VDC)
Compr. 1 Press (5VDC)
Compr. 2 Press (5VDC)
Compr. 3 Press (5VDC)
Compr. 4 Press (5VDC)
AI 8
AI 9
AI 10
AI 11
5V+
15V+
COM
COM
AI 12
AI 13
AI 14
ANALOG INPUT 8-14
MEMORY CARD ANALOG OUTPUT 1-6 ANALOG INPUT 1-7
AO 6
AO 5
AO 4
COM
AO 3
AO 2
AO 1
COM
COM
COM
15V+
AI 7
AI 6
AI 5
5V+
AI 4
AI 3
AI 2
AI 1
SD/MMC
Damper AO
VS compressor 4
VS compressor 3
VS compressor 2
VS compressor 1
Fan AO
DP Outside/Mixed Air
Zone CO2 (0-5V DC)
Outdoor RH (0-5V DC)
Zone RH (0-5V DC)
Return Air (PT1000)
Supply Air (PT1000)
Zone Temp(PT1000)
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SD/MMC
RS485-2
D2 +
D2 -
MEMORY CARD ANALOG OUTPUT 1-6 ANALOG INPUT 1-7
ANALOG INPUT 8-14
ST1 2
ST1 1
AO 6
AO 5
AO 4
COM
AO 3
AO 2
AO 1
COM
COM
COM
15V+
AI 7
AI 6
AI 5
5V+
AI 4
AI 3
AI 2
AI 1
COM
COM
15V+
AI 14
AI 13
AI 12
5V+
AI 11
AI 10
AI 9
AI 8
User Guide | MCX-RTU Rooftop
Wiring Diagram MCX 152V - top and bottom
Input Voltage
110-230 V AC
Stepper Backup
NOT USED
Fan Proof
Phase Loss
Shutdown 1
Shutdown 2
Fan Drive Fault
Compr 1 Drive Fault
Compr 2 Drive Fault
Compr 3 Drive Fault
Compr 4 Drive Fault
Filter Clogged Fault
Damper Override
Title 24
Schedule Override
Cool 1 Proof
Cool 2 Proof
Cool 3 Proof
Reheat (N.O.)
Damper (N.O.)
Heat Reclaim 1 (N.O.)
Heat Reclaim 2 (N.O.)
Heat Pump (N.O.)
Fan Low Speed (N.O.)
Fan High Speed (N.C.)
L
N
COM
+ BATT
15V+
COM
DI 1
DI 2
DI 3
DI 4
COM
DI 5
DI 6
DI 7
DI 8
COM
DI 9
DI 10
DI 11
DI 12
COM
DI 13
DI 14
DI 15
DI 16
DI 18H
DI 18
COM 18
C 9
NO 9
C 10
NO 10
C 11
NO 11
C 12
NO 12
C 13
C 13
NO 13
NC 13
C 14
NO 14
NC 14
C 15
NO 15
NC 15
SUPPLY
POWER
STEPPER BACKUP
DIGITAL INPUT 1-8 DIGITAL INPUT 9-16
DIGITAL INPUT 18
DIGITAL OUTPUT 9-12 DIGITAL OUTPUT 13-15
MCX152V- BOTTOM
COM
CANCAN-RJ
CANL
CANH
R120
CAN-RJ
ETHERNET DIGITAL INPUT 17
ETH
COM 17
DI 17
DI 17H
NO 8
DIGITAL OUTPUT 6-8
NO 7
NO 6
NO 5
DIGITAL OUTPUT 1-5
NO 4
NO 3
NO 2
NO 1
Danfoss
80G8043.02
Optional IO
Expansion
Optional Remote Display
Not Used
Cool 4 Proof
Aux Heat 4 (N.O.)
C 8
Aux Heat 3 (N.O.)
C 7
Aux Heat 2 (N.O.)
C 6
Aux Heat 1 (N.O.)
C 5
Cool 4 (N.O.)
C 4
Cool 3 (N.O.)
C 3
Cool 2 (N.O.)
C 2
Cool 1 (N.O.)
C 1
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Network Topology
The network cable must be EIA485 rated. The cable is connected from controller to controller, and no branches (stars) are allowed on the cable. If the cable length exceeds 1200 meters
(1312 yards) a repeater must be inserted. One repeater must be added for every 32 controllers.
If the data communication cable runs through an electrically noisy environment which impairs
the data signal, one or more repeaters must be added to stabilize the signal. When configuring
Modbus devices on the control bus, the highest device address that can be used is 120 (max 120
Modbus control devices in total). The wires are looped from device to device and must observe
polarity. A is connected to A and B is connected to B. The shield must be connected and complete a path from the device, all controllers, any repeaters finally landed on the ground/shield
terminal at the AK-SM 800. The shield must not be connected to earth ground except at the AKSM 800. At the AK-SM 800 the shield must be attached to the shield terminal and then extended
to an external earth ground. See AK-SM 800 User Guide for system 485 wiring instructions.
The maximum number of MCX-RTU is dependent on which AK-SM 800 is used.
The AK-SM 880 (080Z4008 and 080Z4009) may use a maximum of 45 MCX-RTU controllers.
The AK-SM 820 (080Z4004) may use a maximum of 10 MCX-RTU controllers.
The AK-SM 800 User Manual can be found at:
http://food-retail.danfoss.com/knowledge-center/software/ak-sm-800/
Be sure to configure the Modbus repeater AKA 222 (code#084B2240) to the correct baud rate.
MCX-RTU baud rate must be set to 38.4 K when used with the AK-SM 800. MCX-RTU cannot be
on the same 485 bus with SLVs.
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Sequence of Operation
Cooling Mode
The Controller is in Cooling Mode when the Zone Temperature is above Cool1 Target minus two
times the programmed Cool Range. At this point Free Cooling will be active if the Damper and
Free Cooling are enabled. The Damper will modulate to maintain the Supply Air or Mixed Air
target temperature. Free Cooling is enabled when Zone Enthalpy is above Outdoor Enthalpy and
the above conditions are met. Free Cooling will lockout if the Outdoor Enthalpy, Temperature or
Relative Humidity are above their specific lockout values.
The Cooling stages will become active when the Zone Temperature is above Cool1 Target minus
the Cool Range. Before any cooling stages are activated, the fan must be proofed by either a
digital input or analog input to insure the fan is operational. The method of operation depends
on the Cooling stages configuration. It is required for the previous stage of Cooling be ON prior
to the next stage activating.
If all Cooling stages are configured to use Relay Outputs, then the stages will turn on at Cool
Target plus the Range and off at Cool Target minus the Range. Each stage has a Target, PreDelay
and PostDelay. PreDelay is the delay period once the conditions have been met for the stage to
activate. PostDelay is the period the output will stay on once the conditions have been met for
the stage to deactivate.
If any cooling stages are configured to use an Analog Output, the sequence of operation changes. All stages that use an Analog Output must precede stages that use Relay Outputs. In this
configuration, the first stage will start when the Zone Temperature reaches the Cool 1 Target
minus the Range. The Analog Output will be set to the Min Compr1 Speed. The speed ramps to
100% when the Zone Temperature reaches the Cool 1 Target plus the Range. When Zone Temperature reaches the Cool 2 Target minus the Range the second stage activates, and the first stage
reduces to Min Compr1 Speed. If the second stage uses an Analog Output, then the output will
use the same value used by Cool Stage 1. If there are more than 2 stages, Min Compr Speed will
adjust so the total cooling capacity will equal the maximum capacity of the previous cooling
stage. All the Cooling Analog Outputs will always be in sync as they rise.
Fan control during Cooling Mode depends on the type of fan controlled. For Single Speed Fan,
the fan will be ON whenever there is a demand for cooling. If the fan is configured for continuous operation, then the fan runs all the time. For Two Speed Fan, the fan will be on high
speed whenever there is a demand for cooling. If the fan is configured for continuous operation,
the fan will switch to Low Speed with no demand for cooling. If the fan is configured for On
Demand, the fan switches off when there is no demand for cooling. For Variable Speed Fan, the
fan modulates to maintain the Cooling Supply Air Target with a demand for cooling. If the fan
is configured for continuous operation the fan modulates to the Cool Min Fan Speed with no
demand for cooling. If the fan is configured for On Demand, and there is no demand for cooling,
the fan either modulate to Cool Min Fan Speed or turns OFF, depending on setting of the Fan
Control Demand parameter.
Note: On DOAS units with more than 2 stages of cooling, the first two stages turn ON together.
With the balance of the stages turning ON sequentially.
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Heating Mode
The Controller is in Heating Mode when the Zone Temperature is below Cool1 Target minus 2x
the Cool Range. Before any heating stages are activated, the fan must be proofed by either a
digital input or analog input to insure the fan is operational.
The first type of heating is Heat Reclaim. The first stage of Heat Reclaim will turn on when the
Zone Temperature is below Heat Reclaim 1 Target minus the Heat Reclaim Range. The first stage
of Heat Reclaim will turn off when the Zone Temperature is above Heat Reclaim 1 Target plus
the Heat Reclaim Range. This occurs for each stage of Heat Reclaim. Each stage has their own
Target, PreDelay and PostDelay. PreDelay is the delay period once the conditions have been met
for the stage to activate. PostDelay is the period the output will stay on once the conditions have
been met for the stage to deactivate. It is required that the previous stage of Heat Reclaim be
ON prior to the next stage activating.
The first type of heating is the Aux Heat. The first stage of Aux Heat will turn on when the Zone
Temperature is below Aux Heat 1 Target minus Aux Heat Range. The first stage of Aux Heat
will turn off when the Zone Temperature is above Aux Heat 1 Target plus Aux Heat Range. This
will occur for each stage of Aux Heat. Each stage has its own Target, PreDelay and PostDelay.
PreDelay is the period the output delays once the conditions have been met for the stage to
activate. PostDelay is the period the output will stay on once the conditions have been met for
the stage to deactivate. It is required that the previous stage of Aux Heat be ON prior to the next
stage activating.
Fan control during Heating Mode depends on the type of fan being controlled. For Single Speed
Fan, the fan will be on whenever there is a demand for heating. If configured for continuous
operation, then the fan will run all the time. For Two Speed Fan, the fan will be on high speed
whenever there is a demand for heating. If the fan is configured for continuous operation, the
fan switches to Low Speed when there is no demand for heating. If the fan is configured for
On Demand, the fan will switch OFF when there is no demand for heating. For Variable Speed
Fan, the fan modulates to maintain the Aux Heat Supply Air Target when there is a demand for
heating. If the fan is configured for continuous operation the fan modulates to the Heat Reclaim/
Aux Heat Min Fan Speed with no demand for heating. If the fan is configured for On Demand,
and there is no demand for heating the fan either modulates to Heat Reclaim/Aux Heat Min Fan
Speed or turns OFF depending on the setting of the Fan Control Demand parameter.
Dehumidification Mode
The Controller is in Dehumidification Mode when the Zone RH or Dewpoint is above Dehumidification 1 Target plus the Dehumidification Range. Before any dehumidification stages are
activated, the fan must be proofed by either a digital input or analog input to insure the fan is
operational.
If all Cooling stages are configured to use Relay Outputs, then the Dehumidification stages turn
on when the Zone Relative Humidity or Zone Dewpoint is above the Dehumidification Target
plus the Range and off at Dehumidification Target minus the Range. Each stage has its own Target, PreDelay and PostDelay. PreDelay is the delay period once the conditions have been met for
the stage to activate. PostDelay is the period the output stays on once the conditions have been
met for the stage to deactivate.
If any of the Cooling stages are configured to use Analog Outputs, then the Dehumidification
stages use a modulating capacity method. The Dehumidification Mode is enabled when the
Zone RH or Dewpoint is above Dehumidification 1 Target plus the Dehumidification Range.
Once the Dehumidification Mode is enabled the first stage compressor turns on and modulates
to maintain the Compressor 1 Target Pressure. Each stage has its own Target and Range used to
enable that stage of Dehumidification. If the compressor uses an Analog Output, then the compressor modulates to the compressor target pressure. If the compressor uses a Relay Output,
then the compressor is turned ON while the stage is enabled. The Dehumidification PreDelay
and PostDelay is only used to determine when the Dehumidification Stage is enabled. It does
not control the compressors directly.
Fan control during Dehumidification Mode depends on the type of fan being controlled. For
Single Speed Fan, the fans ON whenever there is a demand for dehumidification. If the fan is
configured for continuous operation, the fan will run all the time. For Two Speed Fan, the fans on
high speed whenever there is a demand for dehumidification. If the fan is configured for continuous operation, the fan switches to Low Speed with no demand for dehumidification. If the fan
is configured for On Demand, the fan switches OFF when there is no demand for dehumidificati-
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on. For Variable Speed Fan, the fan will run at Cooling Max Fan Speed until all stages of dehumidification are running at 100% capacity for the time specified in the Max Capacity Period setting.
Once this occurs, the fan modulates trying to lower the compressor capacity to 98%. If the fan
is configured for continuous operation the fan modulates to the Cool Min Fan Speed with no
demand for dehumidification. If the fan is configured for On Demand, and there is no demand
for dehumidification, the fan will either modulate to Cool Min Fan Speed or turn OFF depending
on the setting of the Fan Control Demand parameter.
CO2 Mode
The CO2 Mode is for health and safety of everyone in the facility. CO2 Mode has priority over all
other modes. And there are no lockouts to effect operation.
CO2 control requires an Analog Output to control the damper. The damper activates when the
Zone CO2 level reaches CO2 Target minus the CO2 Range. The damper modulates proportionally
between the CO2 Target minus the CO2 Range and CO2 Target plus the CO2 Range.
DOAS Mode
DOAS Mode is a combination of all the above modes.
DOAS Mode is controlled by the value for C23 under Setup Options. If set to yes, then the operation is as follows.
Fan Speed is fixed to the value set by parameter FN7 – OvrdFanSpeed(Parameters->Fan)
Outdoor Temperature and Outdoor Relative Humidity are used in place of both the Zone Temperature and Zone Relative Humidity for the Cooling/Heading/Dehumidification modes.
The Damper is set to the DM0(Damper Ovrd Value) value and does not modulate. This value will
typically be set to 80%. Note that if this value is less than 100%, and CO2 Mode is calling for the
Damper to open more, then the Damper will open to the value requested by the CO2 mode.
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Status Screens
Main Status Screen
What the keys do on the Main Status Screen
Enter – Parameter Screen
ESC – Current Alarms
Down Arrow – Current Sensor Values
Left Arrow – Broadcast Sensor Values Received
Access Current Sensor Values from Main Status Screen using the Down Arrow button.
Current Sensor Screen
Sensor Error Values
20000 = Sensor Open
20001 = Sensor Short
20002 = Broadcast Value Not Updating
20003 = Sensor Disabled
ZNTP – Zone Temp ZNRA – Return Air Temp
ZNRH – Zone RH OTTP – Outdoor Temp
ZNET – Zone Enthalpy OTRH – Outdoor RH
ZNDP – Zone Dewpoint OTET – Outdoor Enthalpy
ZNC2 – Zone CO2 Level OTDP – Outdoor Dewpoint
ZNSA – Supply Air Temp OCO2 – Outdoor CO2
ZNMA – Mixed Air Temp Cmp1 – Compr 1 Suction Pressure
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Access Broadcast Sensor Values from the Main Status Screen using the Left Arrow button.
Broadcast Sensor Screen
This screen shows the values that have been received via the broadcast from the AK-SM 800. The
sensors that start with RH and CO2, are just that.
Then you have the three outdoor sensors. The two values at the bottom right are
SCHD(Schedules – bit mask) and LDSH(Load Shed Value)
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Configuration
The configuration screens are accessed by pressing the Enter button (lower right button) on the
controller.
Select Login and enter the password( default: 300) for the following screen. Note that every time
the Main Status Screen is visible the password entered is cleared and must be reentered to access
the password protected items.
Select Service and then Serial Settings to edit the communication Address of the control.
Press enter to put controller in Edit mode, then use the Up/Down arrows to edit. Press enter to
save.
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To configure the controller, go to the Setup Options menu and make selections for your installation. Below is a list of the Setup Options along with their definitions.
OPT Setup Options Function Default Units
C01 Fan Type Select Fan Type – Single Speed, Two Speed or
C02 Fan Control Open Select fan operation during Open periods –
C03 Fan Control Closed Select fan operation during Closed periods –
C04 Fan Proof Select Disable, DI or CT DI
C05 Monitor phase loss Select No or Yes Yes
C06 Cool Stages Select number of cooling stages(0-4) 2
C07 CL1 Stage Size Set size of cooling stage(0.0 – 2000.0) 1000.0
C08 CL1 Stage Type Select RO or AO AO
C09 CL2 Stage Size Set size of cooling stage(0.0 – 2000.0)
C10 CL2 Stage Type Select RO or AO RO
C11 CL3 Stage Size Set size of cooling stage(0.0 – 2000.0)
C12 CL3 Stage Type Select RO or AO RO
C13 CL4 Stage Size Set size of cooling stage(0.0 – 2000.0)
C14 CL4 Stage Type Select RO or AO RO
C15 Heat Reclaim
Stages
C16 Aux Heat Stages Select number of Aux Heat Stages(0-4) 2
C17 Use Gas Heat Does Aux Heat use Gas Heat(Yes/No) Yes
C18 Enable Dehumidi-
fication
C19 Control Dehumid onSelect Control Dehumidification with RH sensor
C20 Reheat Cntl Reheat Control(No, AuxRly,HeatReclaim,Both) HtRclm
C21 Reheat Cntrl
Sensor
C22 Enable Damper Enable Damper using(Disable, DO, or AO) AO
C23 Enthalpy Cntl Enable Enthalpy Control(Yes/No) Yes
C24 Free Cooling Enable Free Cooling(Disable/Enable) Enable
C25 CO2 Option Select CO2 Damper Control(Disable, Monitor,
C26 Damper Cntrl
Sensor
C27 Enable HP Valve Enable Heat Pump Valve in None, Heat or Cool
C28 Fan Control De-
mand
C29 Fan AO Type Select AO Range for Fan(0-5,1-5,0-10,2-
C30 Compr1 AO Type Select AO Range for Cool1(0-5,1-5,0-10,2-
C31 Compr2 AO Type Select AO Range for Cool2(0-5,1-5,0-10,2-
VariSpeed
Continuous or on Demand
Continuous or on Demand
Select number of Heat Reclaim Stages(0-4) 2
Enable Dehumidification(Yes/No) Yes
or CalcDP
Select Reheat Control Sensor(SupplyAir/ZoneTemp)
Control)
Select Damper control sensor(SupplyAir/MixedAir)
Mode
For VS Fan, set fan to Off or Min when no
demand
10,Custom)
10,Custom)
10,Custom)
VS Fan
Continuous
Demand
CalcDP
SplyAir
Control
SplyAir
None
Min
0-10 vdc
1-5 vdc
1-5 vdc
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OPT Setup Options Function Default Units
C32 Compr3 AO Type Select AO Range for Cool3(0-5,1-5,0-10,2-
C33 Compr4 AO Type Select AO Range for Cool4(0-5,1-5,0-10,2-
C34 Damper AO Type Select AO Range for Damper(0-5,1-5,0-10,2-
C35 Custom AO Min Set Min VDC for Custom AO(0.0-10.0vdc) 1.5 vdc
C36 Custom AO Max Set Max VDC for Custom AO(0.0-10.0vdc) 5.0 vdc
C37 Ovrd Night Set-
back
C42 Invert Fan AO Invert Fan AO(Normal/Invert) Normal
C43 Invert Compr 1 AO Invert Compr1 AO(Normal/Invert) Normal
C44 Invert Compr 2 AO Invert Compr2 AO(Normal/Invert) Normal
C45 Invert Compr
10,Custom)
10,Custom)
10,Custom)
If Yes, then Night Setback can be
overridden(Yes/No)
Invert Compr3 AO(Normal/Invert) Normal
1-5 vdc
1-5 vdc
2-10 vdc
No
3 AO
C46 Invert Compr
Invert Compr4 AO(Normal/Invert) Normal
4 AO
C47 Invert Damper AOInvert Damper AO(Normal/Invert) Normal
C48 Zone RH Select Sensor for Zone
Local
RH(Disable,Local,GlobalRH1-5,Avg)
C49 Zone CO2 Select Sensor for Zone CO2(Disable,Local,
Local
GlobalCO2-1-5)
C50 Outdoor Temp Select Sensor for Outdoor
Local
Temp(Disable,Local,Global)
C51 Outdoor RH Select Sensor for Outdoor
Local
RH(Disable,Local,Global)
C52 Outdoor CO2 Select Sensor for Outdoor
Disable
CO2(Disable,Local,Global)
C40 Supply Air
Select Sensor for Supply Air(Disable,Local) Local
Sensor
C39 Return Air
Select Sensor for Return Air(Disable, Local) Local
Sensor
C38 Mixed Air Sensor Select Sensor for Mixed Air(Disable, Local) Local
C41 Zone Cntl Sensor Zone Control uses the Zone or Return Air
Zone
sensor
C53 HT/CL Ctrl Mode Select HT/CL Ctrl Mode(Standard/Supply
Standard
Air)
C54 Fan VLT Modbus Enable Fan VLT Modbus Control(Disable/
Disable
Enable)
C55 HTReset AO Type Select AO Range for HTReset AO(0-5,1-5,0-
0-10
10,2-10,Custom)
C56 Invert HTReset AOInvert HTReset AO(Normal/Invert)
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C57 Zone Control Zone Sensor
Single
Config(Single;Average;High;Low)
C58 BldPress Sensor Select Sensor for Building Pressure
Local
Control(Disable;Local;Global)
C59 Condenser Cntl Enable AO Condenser Control(No/Yes) No
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Next go to the Parameters menu for the screen below.
The table below shows all the parameters available to edit along with their definitions.
GEN Parameters >
General
y01 ON/OFF Master Switch (Off/On) On
y05 Temperature Units Select Temperature/Pressure Units (C/F)
y06 Reset Runtime/
Cycle
y07 Reset to Default Resets all settings to default values (No/Yes),
y08 Night Setback Can be used to put unit into night setback if
y27 Load Shed Value Current Load Shed value from front end. (Read
y28 Load Shed Set If Load Shed Value is above this setting, unit is
y26 Select Schedule If Load Shed Value is above this setting, unit is
y29 Select Title24 Select which schedule in the front end the unit
y09 Enable Alarms Master Alarm Enable (No/Yes) Yes
y10 Changeover Delay Set delay time between switching between
y02 Enable Expansion Enable Expansion Module (No/Yes) No
y11 Enable AI Filters Enable AI Filters (No/Yes) Yes
y12 Global AI Filter Set Global AI Filter Value (0, 2, 4, 16)
y13 Startup Delay Set power up delay before control starts. (5-600) 600 s
y14 MorningStartup-
Period
y15 Sensors Broadcast Number of sensors to broadcast (Read Only)
y16 Broadcast Sensor 1 Select which sensor to broadcast as sensor 1
y17 Broadcast Sensor 2 Select which sensor to broadcast as sensor 2
y18 Broadcast Sensor 3 Select which sensor to broadcast as sensor 3
y19 Broadcast Sensor 4 Select which sensor to broadcast as sensor 4
y20 Broadcast Sensor 5 Select which sensor to broadcast as sensor 5
Function Default Units
Also sets pressure to BAR when C used, PSI
when F used.
Reset Runtime/Cycle values (No/Yes), resets to
No once values are cleared
resets to No once values are set to default
Select Schedule is zero. (Day/Night)
Only)
placed in Load Shed Mode (0-4, zero disables
load shed)
placed in Load Shed Mode (0-4, zero disables
load shed)
will use for night setback.(0-16, zero disables
using front end schedule)
Heat and Cool mode. (0-60)
How many samples are used to average an AI
sensor.
Delay between Night Setback and Normal
Mode(0-360
None/ZnRH1-ZnRH5/ZnCO21-ZnCO25/OtdTp/
OtdRH/OtdCO2
None/ZnRH1-ZnRH5/ZnCO21-ZnCO25/OtdTp/
OtdRH/OtdCO2
None/ZnRH1-ZnRH5/ZnCO21-ZnCO25/OtdTp/
OtdRH/OtdCO2
None/ZnRH1-ZnRH5/ZnCO21-ZnCO25/OtdTp/
OtdRH/OtdCO2
None/ZnRH1-ZnRH5/ZnCO21-ZnCO25/OtdTp/
OtdRH/OtdCO2
F
No
No
Day
--
0
0
0
5 m
16
360 m
None
None
None
None
None
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GEN Parameters >
General
y21 Avg RH1 Select RH1 sensor for Average(None/Local/
y22 Avg RH2 Select RH2 sensor for Average(None/Local/
y23 Avg RH3 Select RH3 sensor for Average(None/Local/
y24 Not Used Not Used
y25 Not Used Not Used
y30 SelectExhaustFan Select Exhaust Fan Schedule(0-16) 0
y31 Aux RO 1 Schedule Select Aux RO 1 Schedule(0-16) 0
y32 Aux RO 2 Schedule Select Aux RO 2 Schedule(0-16) 0
y33 Aux RO 3 Schedule Select Aux RO3 Schedule(0-16) 0
y34 Aux RO 4 Sche-
Function Default Units
None
Glbl1-5)
None
Glbl1-5)
None
Glbl1-5)
Select Aux RO4 Schedule(0-16) 0
dule
y35 Enable Broadcast Enable Broadcast feature(No/Yes) Yes
y36 Night Shutdown Night Shutdown(No/Yes) No
y37 Enable Logging Enable Logging(No/Yes) No
y38 Logging Interval Set Logging Interval 1 m
FAN Parameters >
Function Default Units
Fan
FN1 Fan Off Delay Fan Off Delay (0-30) 2 m
FN2 Fan Proof Value Fan Proof Value (0.0-100.0)
2.0 a
Used with the Fan CT AI . If AI is above this
value the is ON
FN3 Min Fan Speed Min Fan Speed when in Fan Only Mode
30.0 %
(0.0-100.0)
FN4 Fan PI Gain Fan PI Gain Value (0.0-100.0) 5.0
FN5 FanPIIntegrati-
Fan PI Integration Time (6-1000) 60
onTime
FN6 Building Press
Building Pressure Target(-1.00-1.00) 0.00
Target
FN7 OvrdFanSpeed Stage One Fan Speed if exhaust fan one
enabled
FN8 OvrdFanHigh Stage Two Fan Speed if exhaust fan two
enabled
FN9 Cond Target 1 Condenser Target 350 PSI bar/psi
FNA Cond Target 2 Condenser Target if Reheat enabled 400 PSI bar/psi
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COL Parameters >
Cool
Ct1 CL1 Target Cool 1 Target Temperature (10.0-40.0°C) 40.0 °C/°F
Cb1 CL1 PreDelay Cool 1 Pre Delay (0-240) 0 m
Ca1 CL1 PostDelay Cool 1 Post Delay (0-240) 0 m
Ct2 CL2 Target Cool 2 Target Temperature (10.0-40.0°C) 40.0 °C/°F
Cb2 CL2 PreDelay Cool 2 Pre Delay (0-240) 240 m
Ca2 CL2 PostDelay Cool 2 Post Delay (0-240) 240 m
Ct3 CL3 Target Cool 3 Target Temperature (10.0-40.0°C) 40.0 °C/°F
Cb3 CL3 PreDelay Cool 3 Pre Delay (0-240) 240 m
Ca3 CL3 PostDelay Cool 3 Post Delay (0-240) 240 m
Ct4 CL4 Target Cool 4 Target Temperature (10.0-40.0°C) 40.0 °C/°F
Cb4 CL4 PreDelay Cool 4 Pre Delay (0-240) 240 m
Ca4 CL4 PostDelay Cool 4 Post Delay (0-240) 240 m
CLr CL Range +/- Cool Range +/- (0.0-10.0K) 0.5 K/F
CL1 CL Ambient
Lockout
CL2 CL Lockout
Range +/-
CnS CL Night Setback Cool Mode Night Setback (0.0-30.0K) 0.6 K/F
Cs1 CL SupplyAir Cool Mode Supply Air Target for VS Fan
Cm1 CL Min Fan
Speed
Cm2 CL Max Fan
Speed
CC1 CL Min Compr 1
Speed
CC2 CL Min Compr 2
Speed
CC3 CL Min Compr 3
Speed
CC4 CL Min Compr 4
Speed
CLi PI Integ Time 120
CLg PI Gain 8.0
Cns CL Neutral SA 20.0 °C/°F
Rt1 HR1 Target Heat Reclaim 1 Target Temperature (10.0-
Function Default Units
Cool Mode Ambient Lockout (0.0-85.0°C) 15.6 °C/°F
Cool Mode Ambient Lockout Range +/(0.0-10.0K)
(0.0-100.0°C)
Cool Mode Min Fan Speed (0.0-100.0) 50.0 %
Cool Mode Max Fan Speed (0.0-100.0) 75.0 %
Cool Min Compressor 1 Speed (0.0-100.0) 5.0 %
Cool Min Compressor 2 Speed (0.0-100.0) 30.0 %
Cool Min Compressor 3 speed (0.0-100.0) 30.0 %
Cool Min Compressor 4 speed (0.0-100.0) 30.0 %
40.0°C)
1.1 K/F
15.0 °C/°F
22.2 °C/°F
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HRC Parameters >
Heat Reclaim
Rb1 HR1 PreDelay Heat Reclaim 1 Pre Delay (0-240) 240 m
Ra1 HR1 PostDelay Heat Reclaim 1 Post Delay (0-240) 240 m
Rt2 HR2 Target Heat Reclaim 2 Target Temperature (10.0-
Rb2 HR2 PreDelay Heat Reclaim 2 Pre Delay (0-240) 240 m
Ra2 HR2 PostDelay Heat Reclaim 2 Post Delay (0-240) 240 m
Rt3 HR3 Target Heat Reclaim 3 Target Temperature (10.0-
Rb3 HR3 PreDelay Heat Reclaim 3 Pre Delay (0-240) 240 m
Ra3 HR3 PostDelay Heat Reclaim 3 Post Delay (0-240) 240 m
Rt4 HR4 Target Heat Reclaim 4 Target Temperature (10.0-
Rb4 HR4 PreDelay Heat Reclaim 4 Pre Delay (0-240) 240 m
Ra4 HR4 PostDelay Heat Reclaim 4 Post Delay (0-240) 240 m
HRr HR Range +/- Heat Reclaim Range +/- (0.0-10.0K) 0.2 K/F
HR1 HR Ambient
Lockout
HR2 HR Lockout
Range +/-
RnS HR Night Set-
back
HRs HR SupplyAir Heat Reclaim Mode Supply Air Target for
Rm1 HR Min Fan
Speed
Rm2 HR Max Fan
Speed
HET Parameters >
Aux Heat
Ht1 HT1 Target Aux Heat 1 Target Temperature (10.0-
Hb1 HT1 PreDelay Aux Heat 1 Pre Delay (0-240) 240 m
Ha1 HT1 PostDelay Aux Heat 1 Post Delay (0-240) 240 m
Ht2 HT2 Target Aux Heat 2 Target Temperature (10.0-
Hb2 HT2 PreDelay Aux Heat 2 Pre Delay (0-240) 240 m
Ha2 HT2 PostDelay Aux Heat 2 Post Delay (0-240) 240 m
Ht3 HT3 Target Aux Heat 3 Target Temperature (10.0-
Hb3 HT3 PreDelay Aux Heat 3 Pre Delay (0-240) 240 m
Ha3 HT3 PostDelay Aux Heat 3 Post Delay (0-240) 240 m
Ht4 HT4 Target Aux Heat 4 Target Temperature (10.0-
Hb4 HT4 PreDelay Aux Heat 4 Pre Delay (0-240) 240 m
Ha4 HT4 PostDelay Aux Heat 4 Post Delay (0-240) 240 m
HTr HT Range +/- Aux Heat Range +/- (0.0-10.0K) 0.5 K/F
HT1 HT Ambient
Lockout
HT2 HT Lockout
Range +/-
Function Default Units
22.2 °C/°F
40.0°C)
20.0 °C/°F
40.0°C)
19.4 °C/°F
40.0°C)
Heat Reclaim Mode Ambient Lockout (0.0-
85.0°C)
Heat Reclaim Mode Ambient Lockout
Range +/- (0.0-10.0K)
Heat Reclaim Mode Night Setback (0.0-
30.0K)
VS Fan (0.0-100.0°C)
Heat Reclaim Mode Min Fan Speed (0.0-
100.0)
Heat Reclaim Mode Max Fan Speed (0.0-
100.0)
Function Default Units
40.0°C)
40.0°C)
40.0°C)
40.0°C)
Aux Heat Mode Ambient Lockout (0.0-
85.0°C)
Aux Heat Mode Ambient Lockout Range
+/- (0.0-10.0K)
37.8 °C/°F
1.1 K/F
2.8 K/F
30.6 °C/°F
50.0 %
75.0 %
20.8 °C/°F
20.3 °C/°F
18.9 °C/°F
18.3 °C/°F
37.8 °C/°F
1.1 K/F
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User Guide | MCX-RTU Rooftop
HnS HT Night Set-
back
Htd Gas Fan Delay OffGas - Fan Delay Off (0-600) 60 s
HTs HT SupplyAir Aux Heat Mode Supply Air Target for VS
Hm1 HT Min Fan
Speed
Hm2 HT Max Fan
Speed
HTi HT PI Integ Time
HTg Heat PI Gain
HUM Parameters >
Dehumd
Dt1 DH1 Target Dehumidification 1 Target Temperature
Db1 DH1 PreDelay Dehumidification 1 Pre Delay (0-240) 240 m
Da1 DH1 PostDelay Dehumidification 1 Post Delay (0-240) 240 m
Dt2 DH2 Target Dehumidification 2 Target Temperature
HUM Parameters >
Dehumd
Db2 DH2 PreDelay Dehumidification 2 Pre Delay (0-240) 240 m
Da2 DH2 PostDelay Dehumidification 2 Post Delay (0-240) 240 m
Dt3 DH3 Target Dehumidification 3 Target Temperature
Db3 DH3 PreDelay Dehumidification 3 Pre Delay (0-240) 240 m
Da3 DH3 PostDelay Dehumidification 3 Post Delay (0-240) 240 m
Dt4 DH4 Target Dehumidification 4 Target Temperature
Db4 DH4 PreDelay Dehumidification 4 Pre Delay (0-240) 240 m
Da4 DH4 PostDelay Dehumidification 4 Post Delay (0-240) 1000 m
DHr DH Range +/- Dehumidification Range +/- (0.0-10.0K) 10.0
DH1 DH Ambient
Lockout
DH2 DH Lockout
Range +/-
DnS DH Night Set-
back
DrT DH Reheat
Target
DrR DH Reheat
Range +/-
DH3 Max_Capacity
Period
Dp1 Cp1 Press Target Dehumidification Compr 1 Pressure Target
Aux Heat Mode Night Setback (0.0-30.0K) 0.0 K/F
30.6 °C/°F
Fan (0.0-100.0°C)
Aux Heat Mode Min Fan Speed (0.0-100.0) 50.0 %
Aux Heat Mode Max Fan Speed (0.0-100.0) 75.0 %
Function Default Units
100.0
(10.0-40.0°C)
100.0
(10.0-40.0°C)
Function Default Units
100.0
(10.0-40.0°C)
100.0
(10.0-40.0°C)
Dehumidification Mode Ambient Lockout
(0.0-85.0°C)
Dehumidification Mode Ambient Lockout
Range +/- (0-10.0K)
Dehumidification Mode Night Setback
(0.0-30.0K)
Dehumidification Reheat Target (0.0-
40.0°C)
Dehumidification Reheat Range +/- (0.0-
30.0K)
Period for compressors at max capacity
before VS Fan will modulate. (0-60)
(0.0-100.0)
100.0 °C/°F
10.0 K/F
30.0
40.0 °C/°F
30.0 K/F
2 m
8.2 bar/psi
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HUM Parameters >
Dehumd
Dp2 Cp2 Press Target Dehumidification Compr 2 Pressure Target
Dp3 Cp3 Press Target Dehumidification Compr 3 Pressure Target
Dp4 Cp4 Press Target Dehumidification Compr 4 Pressure Target
Gn1 Cp1 PI Gain Dehumidification Compr 1 PI Gain (0.0-
It1 Cp1 Integ Time Dehumidification Compr 1 Integration
Gn2 Cp2 PI Gain Dehumidification Compr 2 PI Gain (0.0-
It2 Cp2 PI Integ
Time
Gn3 Cp3 PI Gain Dehumidification Compr 3 PI Gain (0.0-
It3 Cp3 PI Integ
Time
Gn4 Cp4 PI Gain Dehumidification Compr 4 PI Gain (0.0-
It4 Cp4 PI Integ
Time
DMP Parameters >
Damper Config
DM1 DAM Min Open Damper Min Open (0.0-100.0) 7.0 %
DM2 DAM Max Open Damper Max Open (0.0-100.0) 100.0 %
DM3 DAM Air Target Damper Free Cooling Supply/Mixed Air
DM4 High Amb Temp
Lockout
DM5 High Otdr RH
Lockout
DM6 High Otdr En-
thalpyLockout
DM7 DM Min Fan
Speed
DM8 DM Max Fan
Speed
DMa Damper PI Gain Damper Free Cooling Pi Gain (0.0-100.0) 5.0
DMi Damper PI Integ
Time
Dc1 CO2 Target Damper CO2 Target (0-2000) 900 ppm
Dc2 CO2 Range +/- Damper CO2 Range +/- (0-200) 50 ppm
DM0 Ovrd Value 80.0 %
ALM Parameters >
Alarm Config
S01 Fan Proof Delay Fan Proof Alarm Delay (0-15) 5 s
S02 Zone - High
Temp
Function Default Units
8.2 bar/psi
(0.0-100.0)
8.2 bar/psi
(0.0-100.0)
8.2 bar/psi
(0.0-100.0)
10.0
100.0)
120
Time (5-1000)
10.0
100.0)
Dehumidification Compr 2 Integration
Time (5-1000)
100.0)
Dehumidification Compr 3 Integration
Time (5-1000)
100.0)
Dehumidification Compr 4 Integration
Time (5-1000)
Function Default Units
Target (0.0-40.0)
Damper Free Cooling High Ambient Lockout (0.0-100.0)
Damper Free Cooling High Outdoor RH
Lockout (0.0-100.0)
Damper Free Cooling High Enthalpy Lockout (0.0-100.0)
Damper Min Fan Speed (0.0-100.0) 30.0 %
Damper Max Fan Speed (0.0-100.0) 75.0 %
Damper Free Cooling PI Integration Time
(5-1000)
Function Default Units
Zone Temp High Alarm (0.0-40.0) 30.0 °C/°F
120
10.0
120
10.0
120
18.0 °C/°F
25.0 °C/°F
80.0 %
60.0
60
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ALM Parameters >
Alarm Config
S03 Zone - Low Temp Zone Temp Low Alarm (0.0-40.0) 5.0 °C/°F
S04 Zone - Delay Zone Temp Delay (0-240) 240 m
S05 CO2 - High Level CO2 High Alarm (0-2000) 1000 ppm
S06 CO2 - Delay CO2 Alarm Delay (0-240) 15 m
S07 Fan High Run-
time
S08 Fan High Cycle Fan High Daily Cycles (0-1000) 1000
S09 Cool1 High
Runtime
S10 Cool1 High Cycle Cool 1 High Daily Cycles (0-1000) 1000
S11 Cool2 High
Runtime
S12 Cool2 High Cycle Cool 2 High Daily Cycles (0-1000) 1000
S13 Cool3 High
Runtime
S14 Cool3 High Cycle Cool 3 High Daily Cycles (0-1000) 1000
S15 Cool4 High
Runtime
S16 Cool4 High Cycle Cool 4 High Daily Cycles (0-1000) 1000
S17 Heat1 High
Runtime
S18 Heat1 High Cycle Heat 1 High Daily Cycles (0-1000) 1000
S19 Heat2 High
Runtime
S20 Heat2 High Cycle Heat 2 High Daily Cycles (0-1000) 1000
S21 Heat3 High
Runtime
S22 Heat3 High Cycle Heat 3 High Daily Cycles (0-1000) 1000
S23 Heat4 High
Runtime
S24 Heat4 High Cycle Heat 4 High Daily Cycles (0-1000) 1000
Function Default Units
Fan High Daily Runtime (0-1500) 1500 m
Cool 1 High Daily Runtime (0-1500) 1500 m
Cool 2 High Daily Runtime (0-1500) 1500
Cool 3 High Daily Runtime (0-1500) 1500 m
Cool 4 High Daily Runtime (0-1500) 1500 m
Heat 1 High Daily Runtime (0-1500) 1500 m
Heat 2 High Daily Runtime (0-1500) 1500 m
Heat 3 High Daily Runtime (0-1500) 1500 m
Heat 4 High Daily Runtime (0-1500) 1500 m
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Overrides
Overrides OV1 and OV2, are used to enable Night Setback and Title24 modes.
Overrides OV3 – OV8 are used to place the specific features (as shown below) in manual operation. The override value will be displayed by stage, %, OFF, ON, etc. For analog outputs a value of
zero shuts down the feature and 100 will enable 100% of the feature overridden.
OV0 Service > Over-
rides
OV1 Override Night-
Setback
OV2 Override Title24 Override Title24 – Enables Title24(Off/On) Off
OV3 Override Fan Override Fan(Auto/Override) Auto
OV4 Override Fan % Sets Speed of Fan when in Override(0.0 –
OV5 Override Dam-
per
OV6 Override Cooling Override Cooling(Auto/Off/Stg1/Stg2/
OV7 Override Heat
Reclaim
OV8 Override Aux
Heat
OV9 Override Time-
out
Function Default Units
Override Night Setback – Enables Night
Setback(Off/On)
100.0)
Override DamperAuto/
Off/25%/50%/75%/100%)
Stg3/Stg4/All On)
Override Heat Reclaim(Auto/Off/Stg1/
Stg2/Stg3/Stg4/All On)
Override Aux Heat(Auto/Off/Stg1/Stg2/
Stg3/Stg4/All On)
Override Timeout – Removes override after
so much time (0-30)
Off
0.0 %
Auto
Auto
Auto
Auto
0 m
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User Guide | MCX-RTU Rooftop
Schedule Enable
How it works
On the AK-SM 800, select the MCX-RTU to assign a schedule and select the Schedule tab.
(Note: it is preferred to set up schedules under configuration -> Refrigeration -> Schedules – see
page 28)
If no schedule has been setup, you will see a screen, similar to the one below. If there is no schedule the MCX-RTU will follow the configuration of the unit.
To add a schedule, double click on the “Num of schedules” and set the number of schedules.
Each schedule allows programming a Start and Stop time.
© Danfoss | ADAP-KOOL® | 2018.11
This On/Off Schedule will completely shutdown the MCX-RTU between midnight and 9:45 AM.
This Eco/Com Schedule will place the MCX-RTU in night setback from 10:00pm to 6:45am.
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User Guide | MCX-RTU Rooftop
Backup / Restore
Using More Than One
Zone Sensor
Purpose
Allows the user to backup/restore the parameters in the MCX-RTU to a SD card.
How it works
The Backup/Restore feature menu items are located in the Service Menu.
Backup - After you have inserted a SD card into the MCX-RTU, go to the Service Menu and select
Backup. Allow a minute for the backup to complete. The backup file is saved to the SD card with
the Modbus address of the MCX-RTU as part of the name.
Restore – Insert a SD card that has a backup file on the card. Go to the Service Menu and select
Restore. Allow a minute for the restore to complete.
Note: There is no indication when the backup/restore are complete.
To use more than one zone sensor for a MCX-RTU, use parameter C57(Zone Control).
The allowed settings for this parameter are
Single – Only uses a single sensor for control
Average – Uses the average of 2 to 3 sensors for control
Low – Uses the lowest value of 2 to 3 sensors for control
High – Uses the highest value of 2 to 3 sensors for control
To add sensors to the configuration change the function of an unused analog input to either
Zone Temp 2 or Zone Temp 3. To change the function, go to Service->IO Config located in the
MCX-RTU menu. Then select an unused AI point and edit the FUNC to “Zone Temp 2” or “Zone
Temp 3” and set sensor type/min/max values to PT1000/-22.0/338.0.
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Data Logging
How it works
Logs the list of points below using the logging interval.). The parameter is located at Parameters>General. Set y37(Logging Interval) to the frequency of logging and y36(Enable Logging). to
Yes to start the logging.
Data Log Points
1. Zone 1 Zone 1 Sensor
2. Zone 2 Zone 2 Sensor(if used)
3. Zone 3 Zone 3 Sensor(if used)
4. ZoneTemp Zone Temp used for control
5. ZoneRH ZoneRH(may be local or global sensor)
6. ZoneDewpoint Calculated Zone Dewpoint
7. SupplyAir Supply Air Sensor
8. ReturnAir Return Air Sensor
9. MixedAir Return Air Sensor
10. OutdoorAir Outdoor Air Sensor(may be local or global sensor)
11. OutdoorRH Outdoor RH Sensor(may be local or global sensor)
12. OutdoorDewpoint Calculated Outdoor Dewpoint
13. GlobalSchedules Bit map of the first 16 refrigeration schedules
14. AlarmStatus Alarm Status
15. Mode MCX-RTU Mode
16. EffSetp Calculated Setpoint(heat or cool setpoint depending on
mode)
17. FanOut Fan Control Output
18. FanFail Fan Proof not on when FanOut is ON.
19. PhaseLoss On means PhaseLoss is good
20. ShutdownFlag One of the shutdown DI’s is active
21. CoolHeatModeGlobal What is the control mode(0 = Cool, 1 = Heat)
22. NightSetback Night Setback is active
23. SystemOnOff Master Switch Status
24. CoolStatus1 Cool 1 Status
25. CoolStatus2 Cool 2 Status
26. CoolStatus3 Cool 3 Status
27. CoolStatus4 Cool 4 Status
28. AuxHeatStatus1 Aux Heat Status 1
29. AuxHeatStatus2 Aux Heat Status 2
30. FanStatusAO Fan AO Status – 0-100%
31. DamperStatusAO Damper AO Status – 0-100%
32. GlobalOutdoorTemp Value of Global Outdoor Temp
The Data Log file may be converted to an Excel file by using the DecodeLog converter program.
The program can be requested from Danfoss Tech Support.
© Danfoss | ADAP-KOOL® | 2018.11
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User Guide | MCX-RTU Rooftop
Broadcast Configuration
How it works
The AK-SM 800 scans all the MCX-RTU controllers once a minute for any sensors setup to broadcast to all the controllers. If YES the AK-SM 800 requests the current sensor values from the
MCX-RTU controllers. Then the SM 800 broadcasts up to 14 sensor values to all the MCX-RTU
controllers in one message. Along with the sensor values a Load Shed Value and status for the
16 Schedules are broadcasted twice a minute. All the broadcast settings are within the MCX-RTU
parameters, there are no AK-SM 800 settings for this feature.
Configure Sensors
Select the Sensors to Broadcast. On each controller go to Parameters -> General. Then use
parameters y16, y17, y18, y19 and y20 to select the sensors that you want to share with the other
controllers. Note that each broadcast value may only be used once.
Select the Broadcast Sensors to use on each MCX-RTU controller. On each controller go to Setup
Options, then set parameters C48, C49, C50, C51 and C52. These parameters tell the controller
whether to use the Local sensor or the Global sensors. You can also use these parameters to disable the sensors.
Configure Schedules
The schedules used by the MCX-RTU are setup on the AK-SM 800. The schedule status of the first
16 schedules are broadcasted to all the MCX-RTU controllers. There is no assignment of individual MCX-RTU at the AK-SM 800. The schedule assignments are only configured in the MCX-RTUs.
The schedules at the AK-SM 800 are setup at Configuration->Control->Refrigeration->Schedules.
Even though the AK-SM 800 allows for a max of 100 schedules, only the first 16 schedules are
broadcast to the MCX-RTU controllers.
To select Schedule for Night Setback at the MCX-RTU go to Parameters->General. Edit setting
y26 to the schedule number to control Night Setback.
To select Schedule for Title24, go to Parameters->General. Edit setting y29 to the schedule
number you wish to use to control the Title24 option. The Title24 schedule places the controller
in Night Setback.
Configure Load Shed
To set Load Shed Setting, go to Parameters->General.
Edit settings y28 to the Load Shed value. If the Load Shed value that is broadcast from the AKSM 800 is greater than this value, the controller will use Night Setback settings.
See the AK-SM 800 User Manual for details on configuring the AK-SM 800 for Load Shedding.
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User Guide | MCX-RTU Rooftop
AK-SM 800 MCX-RTU Commission
To commission a MCX-RTU controller on a AK-SM 800, use the following steps.
Connect to the AK-SM 800 using Storeview Desktop or a web browser and log in. Next go to
Configuration.
Next click on the HVAC Layout image.
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This starts the Layout wizard. Click the Right Arrow on the upper right corner.
Enable the MODBUS-RS485 channel by selecting Disabled next to MODBUS-RS485 and change to
Enabled.
Click the arrow to advance to next screen
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Click the Scan button to start the scanning process.
Once scanning is complete a list of the HVAC controllers are displayed.
Click Right Arrow (upper right corner) to proceed.
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Now add additional offline controllers or proceed. To add offline controllers, follow the instructions on the screen. Click the Right Arrow (upper right corner) to proceed.
View a summary of the HVAC controllers attached to the AK-SM 800. If correct click on the Right
Arrow (upper right corner) . If something is missing, click the Left Arrow (upper left corner) and
make changes.
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Pop Up indicating completion using HVAC Layout Wizard.
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IO List
I/O CONFIGURATION
AI ANALOG INPUTS Min Max Type
1 Zone Temperature -30.0°C 170.0°C PT1000
2 Supply Air -30.0°C 170.0°C PT1000
3 Return Air -30.0°C 170.0°C PT1000
4 Zone RH 0.0 % 100.0 % 0-5 V
5 Outdoor RH 0.0 % 100.0 % 0-5 V
6 Indoor CO2 0 ppm 2000 ppm 0-5 V
7 Building Pressure 0.0 100.0 0-5 V
8 Mixed Air -30.0°C 170.0°C PT1000
9 Outdoor Air -30.0°C 170.0°C PT1000
10 Light Level -1.00 1.00 00-5 V
11 Compr 1 Press 0.0bar 34.5 bar 0-5 V
12 Compr 2 Press 0.0 bar 34.5 bar 0-5 V
13 Compr 3 Press 0.0 bar 34.5 bar 0-5 V
14 Compr 4 Press 0.0 bar 34.5 bar 0-5 V
15 Aux AI 1 (Located on Expansion Module) 0.0 200.0 0-5 V
16 Aux AI 2 (Located on Expansion Module) 0.0 200.0 0-5 V
17 Aux AI 3 (Located on Expansion Module) 0.0 200.0 0-5 V
18 Aux AI 4 (Located on Expansion Module) 0.0 200.0 0-5 V
19 Aux AI 5 (Located on Expansion Module) 0.0 200.0 0-5 V
20 Aux AI 6 (Located on Expansion Module) 0.0 200.0 0-5 V
21 Aux AI 7 (Located on Expansion Module) 0.0 200.0 0-5 V
22 Outdoor CO2 (Located on Expansion Module) 0 2000 0-5 V
DI DIGITAL INPUTS Min Max Type
1 Fan Proof 0 1 N.O.
2 Phase Loss 0 1 N.C.
3 Shutdown 1 0 1 N.O.
4 Shutdown 2 0 1 N.O.
5 Fan Drive Fault 0 1 N.O.
6 Compr1 Drive Fault 0 1 N.O.
7 Compr2 Drive Fault 0 1 N.O.
8 Compr3 Drive Fault 0 1 N.O.
9 Compr4 Drive Fault 0 1 N.O.
10 Filter Clogged Fault 0 1 N.O.
11 Damper Override 0 1 N.O.
12 Title24 Override 0 1 N.O.
13 Schedule Override 0 1 N.O.
14 Cool 1 Proof 0 1 N.O.
15 Cool 2 Proof 0 1 N.O.
16 Cool 3 Proof 0 1 N.O.
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DI DIGITAL INPUTS Min Max Type
17 Cool 4 Proof 0 1 N.O.
18 (Located on Expansion Module) 0 1 N.C.
19 (Located on Expansion Module) 0 1 N.C.
20 (Located on Expansion Module) 0 1 N.C.
21 (Located on Expansion Module) 0 1 N.C.
22 (Located on Expansion Module) 0 1 N.C.
23 (Located on Expansion Module) 0 1 N.C.
24 (Located on Expansion Module) 0 1 N.C.
25 (Located on Expansion Module) 0 1 N.C.
26 (Located on Expansion Module) 0 1 N.C.
AO ANALOG OUTPUTS Min Max Type
1 Fan AO 0 % 100 % 0-10 V
2 VS Compr 1 0 % 100 % 1-5 V
3 VS Compr 2 0 % 100 % 1-5 V
4 VS Compr 3 0 % 100 % 1-5 V
5 VS Compr 4 0 % 100 % 1-5 V
6 Damper AO 0 % 100 % 2-10 V
7 Not Available 0 % 100 % NO
8 Not Available 0 % 100 % NO
9 (Located on Expansion Module) 0 % 100 % NO
10 (Located on Expansion Module) 0 % 100 % NO
11 (Located on Expansion Module) 0 % 100 % NO
12 (Located on Expansion Module) 0 % 100 % NO
DO DIGITAL OUTPUTS Min Max Type
1 Cool 1 0 1 N.O.
2 Cool 2 0 1 N.O.
3 Cool 3 0 1 N.O.
4 Cool 4 0 1 N.O.
5 Aux HT 1 0 1 N.O.
6 Aux HT 2 0 1 N.O.
7 Aux HT 3 0 1 N.O.
8 Aux HT 4 0 1 N.O.
9 Reheat 0 1 N.O.
10 Damper 0 1 N.O.
11 HT RCLM 1 0 1 N.O.
12 HT RCLM 2 0 1 N.O.
13 Heat Pump 0 1 N.O.
14 Fan Low 0 1 N.O.
15 Fan High 0 1 N.C.
16 (Located on Expansion Module) 0 1 N.O.
17 (Located on Expansion Module) 0 1 N.O.
18 (Located on Expansion Module) 0 1 N.O.
19 (Located on Expansion Module) 0 1 N.O.
20 (Located on Expansion Module) 0 1 N.O.
21 (Located on Expansion Module) 0 1 N.O.
22 (Located on Expansion Module) 0 1 N.O.
23 (Located on Expansion Module) 0 1 N.O.
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already on order provided that such alternations can be made without subsequential changes being necessary in specifications already agreed.
All trademarks in this material are property of the respective companies. Danfoss and Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
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ADAP-KOOL®
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