VDH FC 785-PC User manual

Description : FC 785-PC Fruit thermostat Doc. nr.: 012063
Type: MANUAL Number of pages: 20 Version: V2.0
File: Do012063 FC785-PC v2.0
EN.wpd
Software: MC785FC Version: V2.04
By: BJB Date: 29-04-2010
VDH Products BV - Roden - Holland Signed: File: Doc 01
FC 785-PC
User manual
(Wall and panel mounting)

User manual Document nr. : 012063 Version : V2.0
FC 785-PC Client : General Page : 2 of 20
The information contained in this document is assumed to be accurate. However VDH Products BV accepts
no liability for eventual mistakes or errors and has the right to change this document without notice.
Table of contents
1. Technical specifications ........................................................3
1.1 FC 785-PC controller .......................................................3
1.2 LMS Relay (extension) module ...............................................5
1.3 LMS Pt100 (extension) module ...............................................5
1.4 LMS Supply module for extension modules ......................................5
2. Functional specifications .......................................................6
3. Control .....................................................................7
3.1 Switching the controller On/Off ...............................................7
3.2 Viewing the measured temperature of the sensor groups ...........................7
3.3 Viewing the measured temperature of the individual sensors ........................7
3.4 Viewing and changing the set point and differential ...............................7
3.5 Setting controller-mode .....................................................7
3.6 Setting fan-mode ..........................................................7
3.7 Setting defrost mode .......................................................8
3.8 Starting defrost manually ....................................................8
3.9 Viewing and adjusting time ..................................................8
3.10 Viewing or resetting the pulse- and hours counters ...............................8
3.11 The menu ...............................................................8
4. Programming internal settings ...................................................9
4.1 Parameter table ..........................................................10
5. Sensor calibration ...........................................................13
6. Alarm .....................................................................13
7. Front views .................................................................14
8. Connections ................................................................15
9. Dimensions ................................................................19

User manual Document nr. : 012063 Version : V2.0
FC 785-PC Client : General Page : 3 of 20
1. Technical specifications
1.1 FC 785-PC controller:
General
Type : FC 785-PC Fruit thermostat
Wall mounting:
Housing : Grey plastic
Material : Polystyrol 454h KG 2 natur BASF
Dimensions : 213 x 180 x 85mm (bhd)
Front : Polycarbonate (IP-44)
Panel mounting:
Housing : Steel plate panel
Material : Steel in silver grey
Dimensions : 217 x 155 x 85mm (wdh)
Panel cut-out : min. 208 x 146mm (wh)
Front : Polycarbonate (IP-44)
Temperature range : -40.0/+50.0C per 0,1C
Supply : 230 Vac; 50/60 Hz (-10/+5%).
Used power : 9 VA
Operating temperature : -20/+50C
Store temperature : -20/+60C
Humidity : 10/+90 % RH not condensing
Accuracy : ± 0,5 % of the range
Note:
The software version number of the FC 785-PC controller can be obtained with parameter P991.
To enhance cooperation of multiple FC 785-PC controllers on one Alfanet RS485 Network,
it is advised that the FC 785-PC controllers to apply must have the same software version
numbers. Controllers with different software version numbers may not properly work together.
Front
Display : 4-digit display for measured temperature
4-digit display for cooling pulses
4-digit display for real-time clock
4-digit display for running hours
Led's : Control = Led Control temperature on display
Product = Led Product temperature on display
Defrost = Led Defrost temperature on display
= Led Alarm active (blinking)
= Led Cooling active
= Led Defrost active
= Led Fan active
= Led Fan in manual-mode
= Led Fan in automatic-mode
Blocking = Led Blocking active
0 = Led Defrost-mode no defrost
= Led Defrost-mode off cycle defrost
= Led Defrost-mode electrical defrost
= Led Defrost-mode hot-gas defrost

User manual Document nr. : 012063 Version : V2.0
FC 785-PC Client : General Page : 4 of 20
Keys : ON/OFF = Controller ON/OFF key with LED
SETP. = Set point push key with LED
(UP) = Up key (increase value)
(DOWN) = Down key (decrease value)
DIFF. = Differential key with LED
= Fan-mode auto/continue key
SENS. = Sensor select key
COOL PHASE = Start pre-cooling phase key with LED
STORE PHASE = Start store phase key with LED
= Defrost-mode selection key
= Reset pulse-counter key
= Reset running hour counter key
= Adjust clock key
In- and outputs
Sensors : Temperature sensor-1 (Prog.) Default Control (Pt-100, 3-wire DIN/IEC 751)
Temperature sensor-2 (Prog.) Default Product (Pt-100, 3-wire DIN/IEC 751)
Temperature sensor-3 (Prog.) Default Defrost (Pt-100, 3-wire DIN/IEC 751)
Temperature sensor-4 (Prog.) Def. Not active (Pt-100, 3-wire DIN/IEC 751)
Please note! Sensor-functions are programmable, thru the internal
parameters settings (P101 .. P116).
Communication : I²C network (Max.5M) (2-wire shielded; 0V(Shield),SDA,SCL)
RS485 network (Max.1KM) (2xTwisted-pair shielded; Shield,2xGND,A,B)
Relay outputs : RY1 Relay-1 (Prog.) Default Alarm (C/NO/NC, 250Vac/10A not inductive)
Next relays have one central common;
RY2 Relay-2 (Prog.) Default not active (NO, 250Vac/10A not inductive)
RY3 Relay-3 (Prog.) Default not active (NO, 250Vac/10A not inductive)
RY4 Relay-4 (Prog.) Default not active (NO, 250Vac/10A not inductive)
RY5 Relay-5 (Prog.) Default not active (NO/NC, 250Vac/10A not inductive)
Please note! Relay-functions are programmable, thru the internal parameters
settings (P951 .. P962).
Please note! RS485-network: Use 2x twisted pair 0,75mm
2shielded cable, withLine-A
connected to Line-A, Line-B connected to Line-B and GND connected to GND.
Connect the shield only at one side of the network cable to earth. The network
cable may not have any side branches only one long serial connection of
controllers, the maximum length of the network cable is 1 KM. A terminator
resistor of 250 Ohm between Line-A and Line-B must be connected at the
beginning and at the end of the RS485 network cable.
Pleas note! Connect the I
2C-extension bus with a 2x 0,75mm 2shielded cable,with
connection SCL to SCL, connection SDA to SDA and shield connected to 0V.
(not to earth). The network cable may not have any side branches only one long
serial connection of controllers with a maximum length of 5 meter.
This cable is only for additional LMS-units when used.
For connections see chapter 8 in this manual!!

User manual Document nr. : 012063 Version : V2.0
FC 785-PC Client : General Page : 5 of 20
1.2 LMS Relay (extension) module: (Max. 1 module)
Supply : 12Vdc (100mA) (From separate supply)
Communication : I2C network (3-wire 0V,SDA,SCL)
Address-jumpers : Place J1 and J2 always.
Relay outputs : RY1 Relay-6 (Prog.) Def. not active (C/NO/NC, 250Vac/10A not inductive)
RY2 Relay-7 (Prog.) Default not active (C/NO, 250Vac/10A not inductive)
RY3 Relay-8 (Prog.) Default not active (C/NO, 250Vac/10A not inductive)
RY4 Relay-9 (Prog.) Default not active (C/NO, 250Vac/10A not inductive)
Please note! Relay functions are programmable thru the
internal parameter settings (P951 .. P962).
1.3 LMS Pt100 (extension) module: (Max. 3 modules)
Supply : 12Vdc (100mA) (From separate supply)
Communication : I2C network (3-wire 0V,SDA,SCL)
Address-jumpers : Pt100-module-1; place J1and J2, don’t place J3. (Sensor 5 .. 8)
Pt100-module-2; place J2, don’t place J1and J3. (Sensor 9 .. 12)
Pt100-module-3; place J1, don’t place J2 and J3. (Sensor 13 .. 16)
Pt100 inputs : Temperature sensor-1 (Prog.) (Pt-100, 3-wire DIN/IEC 751)
Temperature sensor-2 (Prog.) (Pt-100, 3-wire DIN/IEC 751)
Temperature sensor-3 (Prog.) (Pt-100, 3-wire DIN/IEC 751)
Temperature sensor-4 (Prog.) (Pt-100, 3-wire DIN/IEC 751)
Please note! Sensor functions are programmable thru the
internal parameter settings (P101 .. P116).
1.4 LMS Supply module for extension modules
Supply : 230Vac 50/60Hz, 7VA
Outputs : 3x 12Vdc

User manual Document nr. : 012063 Version : V2.0
FC 785-PC Client : General Page : 6 of 20
2. Functional specifications
-The FC-785 PC has three function-modes namely;
1. Standby-phase:
The controller switches only on when hot-gas for another controller, to defrost, is needed.
2. Pre-cooling-phase:
The controller continuously cools (if temperature is higher than set point).
Controllers with the same pre-cool group number (P 806) within the same subnet (P 807)
will start cooling at the same time.
3. Store-phase:
The controller cools only once during the cycle-time (P 307) minutes, until the temperature
is lower or equal to it’s set point. During this cooling the other controllers, in the same
subnet, are blocked as the maximum number of simultaneously cooling controllers during
storage (P308) has been reached. Within a subnet a controller can be assigned to a
storage group (P802). If a controller of a particular storage group (P802) starts to cool
during the store-phase , the other controllers with the same storage group number (P802)
(and subnet numbers) also start with cooling, independently of the mentioned maximum
number (P308). If the temperature exceeds the set point plus the forced-cooling
temperature (P 306), the cooling will also be turned on, even though the controller in the
subnet may still not cool. The temperature is then cooled down to it’s set point. This is to
prevent, that not all controllers succeed in cooling to their set point within the cycle time,
when the number of controllers is large.
-The control parameters can be set in the internal parameter settings. There is a selection of
several defrost-modes like; No defrosting, off cycle defrosting, electrical defrosting or hot-gas
defrosting. Defrost will start on real-time (with max. 12 start-defrost-times) or on interval base.
The interval time (P 516) is adjustable between 1 and 48 hours. As long as the defrost
temperature sensor measures a temperature higher than the defrost-release temperature
(P517), the defrosting can not be started. After defrosting the fan will only start when the fan-
delay-time (P 521) is finished. After defrost the fan is activated as the fan delay time (P 521) is
finished.
a. no defrosting
The fan relay is active when the thermostat requires cooling. If the cooling stops, the fan
will stay on during the programmable delay-time (P401).
b. off cycle defrosting
Fan control during cooling same as at a). During defrosting the fan is continuously on and
none of the programmed defrost relays will be active.
c. electrical defrosting
Fan control during cooling same as at a). Defrost starts on real-time or on interval-time. The
relay for electrical defrosting becomes active. The defrosting will stop on the end-of-defrost
temperature (P 519), with a time limitation (P 518). During defrosting the fan is deactivated.
After defrosting the cooling and the fan will be blocked during the drip-off-time (P 520).
After this time the fan will start if the fan-delay-time (P 521) has ended. If the fan-delay-
time (P 521) is negative, the fan will be activated for (P 521) minutes before the cooling will
start.
d. hot gas defrosting
Fan control during cooling same as at a). Defrost starts on real-time or on interval-time.
The relay for hot-gas defrosting becomes active. For hot-gas defrosting it is necessary that
one or more controllers on the network are cooling. If non of the controllers is cooling, the
controller will wait for 30 minutes. If there is still no unit cooling after this period, then the
controller which temperature has the largest differential to it’s set point, will be activated. In
this way, there will be hot gas available for defrosting. The defrosting will stop on the end-
of-defrost temperature (P 519), with a time limitation (P 518). During defrosting the fan is
deactivated. After defrosting the cooling and the fan will be blocked during the drip-off-time
(P 520). After this time the fan will start if the fan-delay-time (P 521) has ended.
If the fan-delay-time (P 521) is negative, the fan will be activated for (P 521) minutes before
the cooling will start.
- If an alarm input becomes active, the cooling and fan are being stopped and the alarm LED
lights up.

User manual Document nr. : 012063 Version : V2.0
FC 785-PC Client : General Page : 7 of 20
3. Control
At Power-up the controller waits several seconds before starting to control. In the upper right display
“St.UP” appears to indicate this.
During normal operation the upper displays will show the measured temperature and the time. The
lower displays will show the pulses and running hours of the cooling.
3.1 Switching the controller On/Off.
With the ON/OFF key the controller can be switched on or off.
3.2 Viewing the measured temperature of the sensor groups.
When the controller is switched on, the average temperature of the active control-sensors is
shown on the display. For read out the average temperature of the active product-sensors, push
the SENS key. The LED Produkt (product) will be on to indicate this status. Push the SENS-key
again to readout the lowest temperature of the active defrost-sensors. The LED Ontd. (defrost)
will be on to indicate this.
By pushing the SENS-key again the average temperature of the active control-sensors is shown
again. The LED Regel (control) will be on to indicate this. The last chosen readout will remain.
(Remark: When the second defrost sensor is selected, the most left LED also flashes.)
3.3 Viewing the measured temperature of the individual sensors.
To enter the individual sensor display mode, press the SETP. and SENS. keys simultaneously.
The temperature value is shown in the temperature display and to indicate which sensor is
shown the right display shows “SE 1" (Sensor-1). The other sensors can be selected by
pressing the UP or DOWN keys. (“SE 2" = Sensor-2 etc. ) When no key is pushed for 10
seconds the controller will leave the sensor display mode and returns back to it’s normal
operation.
3.4 Viewing and changing the set point and differential.
To view or change the set point or the differential the SETP. or DIFF. key must be pushed. The
set point or differential appears on the temperature-display. It can be adjusted with the UP or
DOWN key as long as the SETP. or DIFF. key is pushed.
Please note! If parameter P805 is not ‘0', the set point will be blinking with an “n”, meaning that
the set point comes from another controller.
In case the controller is using the night-set point (parameters 350 and 351) for control, the
display on the right shows “nAch” when looking at the set point. The night set point can be
adjusted with the UP or DOWN as long as the SETP. key is pushed. In day-mode the display on
the right shows the time as usual.
If both set points (day and night) has to be changed, hold SETP. key for more than 7 seconds.
Now the night set point is shown. After releasing the SETP. key the readout can be altered
between night and day set point by pushing the SETP. key. With the UP or DOWN key the
value of the shown set point can be changed.
3.5 Setting controller-mode.
At power-up the controller starts with the pre-cooling phase.
Push the STORE-PHASE key to set the controller in store-mode. The LED above this key will
illuminate to indicate this. Push the COOL-PHASE key to set the controller into the pre-cool
mode. The LED above this key will illuminate to indicate this. By pushing the COOL-PHASE
and STORE-PHASE key simultaneously the controller can be put into the standby mode (if P
901 = 1). For the indication for this mode both LEDS will flash.
3.6 Setting fan-mode
By pushing the (Fan-mode) key, the fan can be set to automatic-mode (LED is on) or to
continue-mode (LED is on). During electrical- or hot-gas-defrost the fan switches off.
The LED’S next to the pulses-display shows the status of the fan. The LED is on if the fan is
active. At power-up, the FC 785-PC fan-mode is set to automatic-mode ( ).

User manual Document nr. : 012063 Version : V2.0
FC 785-PC Client : General Page : 8 of 20
3.7 Setting defrost mode.
By pressing the key one ore more times the defrost-mode can be set, depending on
parameter P 501 and P 502. The LED’s besides the running hour counter shows the defrost-
mode which is used for controlling the defrost.
3.8 Starting defrost manually.
By pressing the UP and DOWN keys at the same time the defrost can be started (forced)
manually, independently to the defrost-timer.
3.9 Viewing and adjusting time.
The upper right display shows the time. Adjust the clock by pushing the key for more than
one second. The time can now be adjusted by pushing the UP and DOWN keys. The weekday
can be adjusted by pressing once more, for longer than 1 second, the key.
By pushing the ON/OFF key or if no key is touched for 30 seconds, the display returns to its
normal operation mode.
3.10 Viewing or resetting the pulse- and hours counters.
The lower left display shows the cooling pulses and the lower right display shows the cooling
running hours.
By pushing the (reset pulses) key from the cooling pulses or the (reset hours) key from the
running hours-counter the according counter will be reset to zero. If the counters reaches
numbers larger than ‘999' or ‘999,9', OFL(overflow) will appear in the according display.
3.11 The menu.
The menu can be entered by pushing the COOL-PHASE key if the controller is in the pre-cool
mode or by pushing the STORE-PHASE key if the controller is in the store-mode.
To leave the menu press the COOL-PHASE or STORE-PHASE key or press no key for more
than 10 seconds. The menu has the following items to select from, which can be selected by
pushing the SENS. key;
1. Pulses/running hours per 24 hours.
The upper left display shows “PulS” (Pulses) and the lower left display shows the total
amount of pulses during this day (started at 0:00 hour). The upper right display shows
“UrEn” (Hours) and the lower right display shows the total hours of the cooling counted
this day from 0:00 hour.
The controller stores the pulses and hour counts for one week. To see the other days of
the week push the UP or DOWN keys, the day LED’s in the upper right display shows
which day is selected from the past week.
2. Dehumidify function.
With this menu item, it is possible to activate the dehumidify function of the controller.
The upper left display shows “ontV” (Dehumidify function) and the upper right display
shows “ON” or “OFF” to indicate whether the function is active or not.
When the humidify function is activated the lower right display shows “cont.”, indicating
that this function stays active until the function is set manually inactive, or the display
shows a countdown counter which indicates how many minutes are remaining.
To manual switch the dehumidify function on or off, push the UP or DOWN keys, the
upper right display switches from “ON” to “OFF” to indicate the status.
As the dehumidify function is activated this way, the function will continuously dehumidify.
To set the countdown counter for the dehumidify function push the SETP. key and hold it
together with the UP or DOWN key to increase or decrease the interval with 10 minutes.
The dehumidification may also be started automatically using parameter P380 and P381.
To indicate that the controller is dehumidifying, at normal operation, all decimal dots are
blinking on the upper displays.
Dehumidifying will be achieved by activating the cooling and heating at the same time
above set point. Because the cooling capacity is higher than the heating capacity the
temperature will reach it’s set point slower and so the product will dry longer.

User manual Document nr. : 012063 Version : V2.0
FC 785-PC Client : General Page : 9 of 20
3. INFO menu
During the info menu, the status of relay 1 .. 7 is indicated by the day LEDs mo .. su.
The upper left display shows “INFO”, now the controller gives supplementary information
of the status of the controller. By pushing the UP or DOWN keys the following status
information will by shown;
Cool status The lower left display shows “COOL” and the lower right display
shows the cooling status, which can have following values;
0 = Controller is not cooling
1 = Controller is not cooling because it is blocked
2 = Controller wants to cool and waits for the network
3 = Controller is cooling and is now active on the minimum cooling time (P301)
4 = Controller is cooling
5 = Controller wants to stop cooling but waits for the network
6 = Controller is active in pump-down time
7 = Controller may not cool because the minimum time between two cool actions
(P302) has not been passed.
8 = Controller wants to stop cooling to start defrost but waits for the network
9 = Controller will start cooling but is now equalising pressure (P526)
In case this controller is the master, then the upper right display shows the
remaining time for the next store cycle.
Defrost status The lower left display shows “dEfr” and the lower right display shows
the defrost status, which can have the following values;
0 = Controller is not defrosting
1 = Controller is starting defrost soon
2 = Controller is starting off cycle defrost soon
3 = Controller is starting electrical defrost soon
4 = Controller waits for the network to start hot-gas defrost
10 = Controller is active in off cycle defrost
11 = Controller is active in electrical defrost
12 = Controller is active in hot-gas defrost
13 = Controller is active in drip off time
14 = Controller is active in pump-down time
15 = Controller is fan-on delay
In case of interval-defrost the upper right display shows also the time in minutes to
the next defrost-cycle.
Network status Only as this controller is the master on it’s subnet
The lower left display shows “nEt” and the lower right display shows the number of
controllers active in this subnet.
4. Programming internal settings
Push the SETP. and DIFF. key simultaneously for more than 5 seconds to enter the internal
programming mode.
If P904 is not zero, the controller will ask for a password. The lower display shows ‘code’ and the
required password can be entered in the upper display. The first digit flashes and by pressing the UP
or DOWN key the value of this digit can be changed. If the right value is entered you can confirm it by
pressing the SETP key. Now the next digit can be entered. If the last digit is confirmed by the SETP
key the controller checks the password. If this is correct you enter the parameter-mode. If it is not
correct the controller returns to it’s normal operation.
If parameter P904 is zero, the password check is disabled and the controller goes directly into the
parameter-mode.
In the parameter-mode ‘P1' will appear in the temperature display. The P is flashing. The number
behind the P is the parameter-number which can be changed by pushing the UP or DOWN key.
In the pulse-counter display the value of the chosen parameter will appear. By pushing the SETP. key
simultaneously with the UP or DOWN key the value can be changed.
When no key is pushed for 30 seconds the controller will leave the programming menu and returns
back to it’s normal operation.

User manual Document nr. : 012063 Version : V2.0
FC 785-PC Client : General Page : 10 of 20
4.1 Parameter table.
Nr Description Range Units Default
Sensor function group:
P 101
P 102
P 103
P 104
P 105
P 106
P 107
P 108
P 109
P 110
P 111
P 112
P 113
P 114
P 115
P 116
Function sensor-1 (FC785-PC Pt100-1)
0 = not present
1 = control sensor
2 = product sensor
3 = defrost sensor
4 = defrost sensor-2
5 = alarm contact (no): control off
6 = door contact (no): cooling + fan off during max. time
(P 902)
7 = blocking contact (no): everything off
Function sensor-2 (FC785-PC Pt100-2)
Function sensor-3 (FC785-PC Pt100-3)
Function sensor-4 (FC785-PC Pt100-4)
Function sensor-5 (LMS-UNIT-1 Pt100-1)
Function sensor-6 (LMS-UNIT-1 Pt100-2)
Function sensor-7 (LMS-UNIT-1 Pt100-3)
Function sensor-8 (LMS-UNIT-1 Pt100-4)
Function sensor-9 (LMS-UNIT-2 Pt100-1)
Function sensor-10 (LMS-UNIT-2 Pt100-2)
Function sensor-11 (LMS-UNIT-2 Pt100-3)
Function sensor-12 (LMS-UNIT-2 Pt100-4)
Function sensor-13 (LMS-UNIT-3 Pt100-1)
Function sensor-14 (LMS-UNIT-3 Pt100-2)
Function sensor-15 (LMS-UNIT-3 Pt100-3)
Function sensor-16 (LMS-UNIT-3 Pt100-4)
0..7
0..6
0..6
0..6
0..4
0..4
0..4
0..4
0..4
0..4
0..4
0..4
0..4
0..4
0..4
0..4
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
1
2
3
0
0
0
0
0
0
0
0
0
0
0
0
0
Sensor offsets group: (for calibration)
P 201
P 202
P 203
P 204
P 205
P 206
P 207
P 208
P 209
P 210
P 211
P 212
P 213
P 214
P 215
P 216
Sensor-1 offset (FC785-PC Pt100-1)
Sensor-2 offset (FC785-PC Pt100-2)
Sensor-3 offset (FC785-PC Pt100-3)
Sensor-4 offset (FC785-PC Pt100-4)
Sensor-5 offset (LMS-UNIT-1 Pt100-1)
Sensor-6 offset (LMS-UNIT-1 Pt100-2)
Sensor-7 offset (LMS-UNIT-1 Pt100-3)
Sensor-8 offset (LMS-UNIT-1 Pt100-4)
Sensor-9 offset (LMS-UNIT-2 Pt100-1)
Sensor-10 offset (LMS-UNIT-2 Pt100-2)
Sensor-11 offset (LMS-UNIT-2 Pt100-3)
Sensor-12 offset (LMS-UNIT-2 Pt100-4)
Sensor-13 offset (LMS-UNIT-3 Pt100-1)
Sensor-14 offset (LMS-UNIT-3 Pt100-2)
Sensor-15 offset (LMS-UNIT-3 Pt100-3)
Sensor-16 offset (LMS-UNIT-3 Pt100-4)
-10.0..10.0
-10.0..10.0
-10.0..10.0
-10.0..10.0
-10.0..10.0
-10.0..10.0
-10.0..10.0
-10.0..10.0
-10.0..10.0
-10.0..10.0
-10.0..10.0
-10.0..10.0
-10.0..10.0
-10.0..10.0
-10.0..10.0
-10.0..10.0
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
°C
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Cooling group:
P 301
P 302
P 303
P 304
P 305
P 306
P 307
P 308
P 350
P 351
Minimum cooling-time
Minimum time between two cooling-actions
Maximum cooling-time during storing
Pump-down time after cooling-action
Maximum cool-temperature below set point;
after this cooling is switched off (forced), provided that
minimum cooling-time (P301) has elapsed
Maximum temperature above set point;
after this the cooling will switched on (forced)
Cycle-time start cooling at store mode
Maximum number of units cooling at the same time during store
mode (in subnet)
Start time night set point (24.00 = not active)
End time night set point
0..99
0..99
0..99
0..999
0..10.0
0..10.0
10..240
1..31
00.00..24.00
00.00..24.00
minutes
minutes
minutes
seconds
°C
°C
minutes
-
hrs.min
hrs.min
0
0
0
0
0.5
1.5
90
1
24.00
24.00
Dehumidifying group
P 380
P 381 Dehumidifying time (0 = Only manual start dehumidifying) Dehumidifying interval 0..120 1..96 Minutes hours 0 24

User manual Document nr. : 012063 Version : V2.0
FC 785-PC Client : General Page : 11 of 20
Nr Description Range Units Default
Ventilation group:
P 401
P 402
P 403
P 404
P 405
P 406
P 407
P 408
P 409
P 410
P 411
P 412
Ventilation delay after cooling switches off
Automatic ventilation mode:
0 = no automatic ventilation
1 = automatic ventilation on real-time
2 = automatic ventilation on pulse/pause
Pulse-time automatic ventilation
Pause-time automatic ventilation
Automatic ventilation start-time nr-1 (24.00 = not active)
Automatic ventilation stop-time nr-1
Automatic ventilation start-time nr-2
Automatic ventilation stop-time nr-2
Automatic ventilation start-time nr-3
Automatic ventilation stop-time nr-3
Automatic ventilation start-time nr-4
Automatic ventilation stop-time nr-4
0..99
0..2
0..999
0..999
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
minutes
-
minutes
minutes
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
0
0
0
0
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
Defrost group:
P 501
P 502
P 503
P 504
P 505
P 506
P 507
P 508
P 508
P 510
P 511
P 512
P 513
P 514
P 515
P 516
P 517
P 518
P 519
P 520
P 521
P 522
P 523
P 524
P 525
P 526
P 527
P 528
P 529
P 530
Electrical defrost possible 0 = no 1 = yes
Hot-gas defrost possible 0 = no 1 = yes
Defrost mode
0 = on real-time base
1 = on interval base
Defrost start time-1 (24.00 = not active)
Defrost start time-2
Defrost start time-3
Defrost start time-4
Defrost start time-5
Defrost start time-6
Defrost start time-7
Defrost start time-8
Defrost start time-9
Defrost start time-10
Defrost start time-11
Defrost start time-12
Defrost interval time
Defrost release temperature
Maximum defrost time
End-of-defrost temperature
Drip off time
Fan-on delay time after defrosting
When negative the fan will x minutes be on before any
cooling action
Maximum number of cells which are defrosting electrical
simultaneously (in subnet)
Maximum number of cells which are defrosting hot-gas
simultaneously (in subnet)
Minimum number of cells cooling needed for hot-gas defrosting
(in subnet)
Number of condensers to be defrosted
Pressure equalizing time before cooling
Cool down after defrost 0 = no , 1 = yes
Pump down time after defrost
Fan on after defrost on
0 = time(P521)
1 = temperature(P530)
Temperature to start fan
0..1
0..1
0..1
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
1..48
-10.0..40.0
0..99
-10.0..40.0
0..99
-10..99
1..31
1..31
1..3
1..2
0..500
0..1
0..999
0..1
-40.0..50.0
-
-
-
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hours
°C
minutes
°C
minutes
minutes
-
-
-
-
seconds
-
seconds
-
°C
0
0
0
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
6
0.0
10
0.0
0
0
1
1
1
1
180
0
0
0
10.0

User manual Document nr. : 012063 Version : V2.0
FC 785-PC Client : General Page : 12 of 20
Nr Description Range Units Default
Alarm group:
P 601
P 602
P 603
P 604
P 605
P 606
P 607
P 608
P 609
P 610
P 611
P 612
P 613
P 614
P 615
P 616
P 617
P 618
Absolute minimum alarm during pre-cooling
Absolute minimum alarm delay during pre-cooling
Absolute maximum alarm during pre-cooling
Absolute maximum alarm delay during pre-cooling
Relative minimum alarm during pre-cooling
Relative minimum alarm delay during pre-cooling
Relative maximum alarm during pre-cooling
Relative maximum alarm delay during pre-cooling
Absolute minimum alarm during storage
Absolute minimum alarm delay during storage
Absolute maximum alarm during storage
Absolute maximum alarm delay during storage
Relative minimum alarm during storage
Relative minimum alarm delay during storage
Relative maximum alarm during storage
Relative maximum alarm delay during storage
Action at minimum alarm:
0 = Only report with alarm relay
1 = Report with alarm relay and everything off
Action at maximum alarm:
0 = Only report with alarm relay
1 = Report with alarm relay and everything off
-40.0..50.0
0..99
-40.0..50.0
0..99
-40.0..40.0
0..99
-40.0..40.0
0..99
-40.0..50.0
0..99
-40.0..50.0
0..99
-40.0..40.0
0..99
-40.0..40.0
0..99
0..1
0..1
°C
minutes
°C
minutes
°C
minutes
°C
minutes
°C
minutes
°C
minutes
°C
minutes
°C
minutes
-
-
0.0
0
50.0
0
-10.0
0
10.0
0
0.0
0
50.0
0
-10.0
0
10.0
0
0
0
Blocking group:
P 701
P 702
P 703
P 704
P 705
P 706
P 707
P 708
P 709
P 710
P 711
P 712
P 713
P 714
P 715
P 716
P 720
Blocking start time-1 Monday till Friday (24.00 = not active)
Blocking stop time-1 Monday till Friday
Blocking start time-2 Monday till Friday
Blocking stop time-2 Monday till Friday
Blocking start time-3 Monday till Friday
Blocking stop time-3 Monday till Friday
Blocking start time-4 Monday till Friday
Blocking stop time-4 Monday till Friday
Blocking start time-1 Saturday till Sunday
Blocking stop time-1 Saturday till Sunday
Blocking start time-2 Saturday till Sunday
Blocking stop time-2 Saturday till Sunday
Blocking start time-3 Saturday till Sunday
Blocking stop time-3 Saturday till Sunday
Blocking start time-4 Saturday till Sunday
Blocking stop time-4 Saturday till Sunday
Ventilation still active during blocking 0 = no, 1 = yes
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
00.00..24.00
0..1
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
hrs.min
-
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
0
Network group:
P 801
P 802
P 803
P 804
P 805
P 806
P 807
Network number
(set a unique number for each controller in the network)
Storage group number:
Controllers with equal group numbers, in the same subnet,
will cool simultaneously during storage (0 = not active)
Cooling capacity of this cell (As P 802 = 0 than not active)
Maximum cool capacity demand for pre-cooling (in subnet)
Set point from controller with network number (in same subnet)
(0 = set point not linked)
Pre-cooling group number:
Controllers with equal group numbers, in same subnet, will
cool simultaneously during pre-cooling (0 = not active)
Sub-Network number
Controllers with the same Sub-Network number work
together in a network. (F.i. Used when more than one Master
is needed in one Network)
1..31
0..31
0.0..100
1..500
0..31
0..31
0..31
-
-
kW
kW
-
-
-
1
0
0.0
500
0
0
0
Other group:
P 901
P 902
P 903
P 904
Cell may be used as standby-cell if hot-gas is needed
0 = no, 1 = yes
Maximum time door open
Log interval
Password ( [0000] = not active)
0..1
0..999
1..120
[0000].[9999]
-
minutes
minutes
-
0
5
5
[0000]

User manual Document nr. : 012063 Version : V2.0
FC 785-PC Client : General Page : 13 of 20
Nr Description Range Units Default
Relay assignment group:
P 951
P 952
P 953
P 954
P 955
P 956
P 957
P 958
P 959
P 960
P 961
P 962
P 963
Function solenoid valve to relay
0 = none relay assigned
1..5 = relay-1..5 on controller
6..9 = relay-1..4 on LMS relay module
Function suction valve to relay
Function off cycle defrosting to relay
Function electrical defrosting to relay
Function hot-gas defrosting to relay
Function ventilation during cooling to relay
Function ventilation during ventilation to relay
Function heating to relay
Function alarm to relay
Function electrical defrosting-2 to relay
Function hot-gas defrosting-2 to relay
Function pressure equalizing to relay
Function collect hot-gas defrost to relay
Remark:
It is possible to assign more than one function to a single
relay. Example; Ventilation during cooling (P 956) and during
ventilation (P 957) to the same relay
0..9
0..9
0..9
0..9
0..9
0..9
0..9
0..9
0..9
0..9
0..9
0..9
0..9
-
-
-
-
-
-
-
-
-
-
-
-
-
0
0
0
0
0
0
0
0
1
0
0
0
0
Software / production group:
P 991
P 992
P 993
Software version number
Serial number
Production date
-
-
-
-
-
year/wk
-
-
-
5. Sensor calibration
The temperature sensors 1 till 16 can be calibrated with the parameters P 201 till P 216.
If a temperature-sensor shows 0,2C to much, than the according sensor-offset must be lowered with
0,2C.
6. Alarm
If a relay is configured (P 959) as a alarm relay (default relay-1), then normally the relay is closed and
opens when an alarm occurs. So there is also an alarm given when the supply voltage has been cut
off. During the alarm the LED will flash on the front. Depending of the internal parameters the
controller will stop or continue. An alarm can be caused by:
Sensor failure: E1 = Temperature sensor-1 control Sensor-1 defective
E2 = Temperature sensor-2 control Sensor-2 defective
E3 = Temperature sensor-3 control Sensor-3 defective
E4 = Temperature sensor-4 control Sensor-4 defective
E5 = Temperature sensor-5 LMS module-1 Pt100-1 defective
.. until ..
E16 = Temperature sensor-16 LMS module-3 Pt110-4 defective
Temperature alarm: A lo = Absolute minimum temperature alarm
A hi = Absolute maximum temperature alarm
r lo = Relative minimum temperature alarm
r hi = Relative maximum temperature alarm
Other alarms: A1 = No hot-gas defrosting possible because there are no other
FC 785-PC’s in the subnet.
The alarm-reports will be visualized in the temperature display (upper left display).
Alarm Reset:
If a new alarm occurs, the alarm will be first continuously displayed in the display.
The new alarms can be confirmed one by one by pressing the UP or DOWN button.
If all new alerts have been confirmed, the normal contents of the display flashes and is
alternated with the remaining alarms. With the UP or DOWN key you can switch between the
remaining alarms.

User manual Document nr. : 012063 Version : V2.0
FC 785-PC Client : General Page : 14 of 20
7. Front views
Front view FC 785 -PC wall mounting
Front view FC785-PC panel mounting, drawing 100416

User manual Document nr. : 012063 Version : V2.0
FC 785-PC Client : General Page : 15 of 20
8. Connections
Connections FC 785-PC wall-mounting, drawing 992374w6

User manual Document nr. : 012063 Version : V2.0
FC 785-PC Client : General Page : 16 of 20
Connection diagram 992468w7:
FC785-PC wall-mounting + LMS Relay module + LMS Pt100 module LMS Supply module

User manual Document nr. : 012063 Version : V2.0
FC 785-PC Client : General Page : 17 of 20
Connections FC785-PC panel-mounting, drawing 992375w5

User manual Document nr. : 012063 Version : V2.0
FC 785-PC Client : General Page : 18 of 20
Connections RS 485 Network:
Connections RS485-network with network numbers and subnetwork numbers:

User manual Document nr. : 012063 Version : V2.0
FC 785-PC Client : General Page : 19 of 20
9. Dimensions
Dimensions FC785-PC wall-mounting, drawing 940024
Dimensions FC785-PC panel-mounting, drawing 961271

User manual Document nr. : 012063 Version : V2.0
FC 785-PC Client : General Page : 20 of 20
Dimensions LMS Relay-module, drawing 970983
Dimensions LMS Supply-module and LMS Pt100-module, drawing 970908
-.-.-.-.-.-.-.-.-.-
@