WELBA MRF-2 Series User manual

1. Introduction
104781 - MRF-2 | MRH-2 - V2.4 - 22.07.2020 Page 1
Programmable PID multichannel
temperature controller
MRF-2 ...
MRH-2 ...
Installation and operating instructions
for plant engineering companies
Software version V2.4
Programmable via
configuration software
WELBA „KONSOFT"
Measuring - Controlling - Regulating
All from the same source

1. Introduction
Page 2104781 - MRF-2 | MRH-2 - V2.4 - 22.07.2020
Publisher:
Welba GmbH
Electronic Control Engineering
Gewerbepark Siebenmorgen 6
D-53547 Breitscheid
Fon: +49 (0)2638 / 9320-0
Fax: [phone] / 9320-20
[email protected]
www.welba.de

1. Introduction
104781 - MRF-2 | MRH-2 - V2.4 - 22.07.2020 Page 3
Content
1. Introduction ................................................................................................................................................4
1.1 Information about this operating instructions .................................................................................4
1.2 Limitation of liability ........................................................................................................................5
1.3 Appliance description .....................................................................................................................6
1.4 Model / type plate...........................................................................................................................7
1.5 Items supplied ................................................................................................................................8
1.6 Disposal..........................................................................................................................................8
1.7 Cleaning instructions......................................................................................................................8
1.8 Dimensions.....................................................................................................................................9
1.9 Technical data ..............................................................................................................................10
2. Safety .......................................................................................................................................................11
2.1 General Information .....................................................................................................................11
2.2 Intended use.................................................................................................................................13
2.3 Wiring, screening, earthing ..........................................................................................................14
2.4 Electrical safety ............................................................................................................................14
3. Installation ................................................................................................................................................15
3.1 Location and climatic conditions ..................................................................................................15
3.2 Unpacking and storage ................................................................................................................15
3.3 Installation of housing ..................................................................................................................15
3.4 Fitting the sensor..........................................................................................................................16
4. Electrical connection ................................................................................................................................17
4.1 Safety during installation ..............................................................................................................17
4.2Procedure.....................................................................................................................................17
4.3 Wiring ...........................................................................................................................................18
4.4 Circuit diagram .............................................................................................................................18
5. Operation .................................................................................................................................................19
5.1 General Hints and Tips ................................................................................................................19
5.2 BG ETEMController overview ......................................................................................................20
5.3 Controls / Displays .......................................................................................................................21
5.3.1 Meaning of LED’s........................................................................................................................21
5.3.2 Button functions (Working level) .................................................................................................21
5.4 Controller architecture..................................................................................................................22
5.4.1 Explanation of controller and function blocks .............................................................................23
5.5 The quick way to set parameters .................................................................................................25
5.6 Parameter Quick-Guide ...............................................................................................................26
5.7 Parameter levels ..........................................................................................................................27
5.7.1 Operation of parameter levels.....................................................................................................28
5.7.2 Changing and storing parameters ..............................................................................................28
5.8 Parameter lists .............................................................................................................................29
5.8.1 C- parameters (Programming level) ...........................................................................................29
5.8.2 P- parameters (configuration level).............................................................................................31
5.8.3 H- parameter (option level) .........................................................................................................35
5.8.4 d- parameter (hardware configuration) .......................................................................................39
6. Other information .....................................................................................................................................42
6.1 Setting the actual value correction ...............................................................................................42
6.2 Fault indication .............................................................................................................................43
6.3 General measures when using electronic control systems..........................................................44

1. Introduction
Page 4104781 - MRF-2 | MRH-2 - V2.4 - 22.07.2020
1. Introduction
1.1 Information about this operating instructions
These operating instructions are intended for the use by plant engineers, installers
or service technicians of the MRF-2 | MRH-2 PID multichannel temperature control-
ler. This manual contains all necessary suggestions, informations, recommendations
and advice for the safe and proper installation and commissioning of the controller.
It is only with the knowledge of this operating instruction that errors in the controller
can be avoided and a trouble-free operation is guaranteed.
Read the assembly instructions carefully and adhere to the recommendations descri-
bed in order to ensure proper operation. In addition, the local accident prevention
regulations and general safety regulations are to be observed for the field of appli-
cation of the controller.
When delivered, the parameterization of the MRF-2 | MRH-2 does not
necessarily correspond to the intended use. This must be adjusted ac-
cordingly during the installation.
Basically, the installer of the system is responsible for the commissio-
ning of the control.
Operation instruction for the operator
The plant engineers, the installer or the service technician must prepare operating
instructions for the operator of the controller. In this case the parameterization of the
delivery state must be clearly documented.
We recommend to only document those parameters which the operator of the con-
troller needs.
When preparing the operating instructions for the operator the local regulations have
to be observed –see chapter “Safety”.
These operating instructions include important technical and safety in-
formation. It is vital to carefully study all these instructions before the
installation of the control or in case of any other work with the control!
These instructions have been prepared with the utmost care. However, the informa-
tion contained herein is not an assurance of product characteristics.
The manufacturer accepts no liability for errors and reserves the right to make tech-
nical changes at any time. All rights reserved.
NOTICE for storing the operating instructions
This instruction manual is part of the product and must always be readily available
for the service technician.
WARNING
NOTICE

1. Introduction
104781 - MRF-2 | MRH-2 - V2.4 - 22.07.2020 Page 5
1.2 Limitation of liability
The proper function of the WTS-300 depends on many external factors
on which the manufacturer has no influence. The manufacturer
assumes no liability for damage to connected components or
downstream process components.
All information and instructions in this manual have been compiled taking into ac-
count the applicable standards and regulations, the state of the art and our long-term
experiences.
WELBA GmbH does not assume any liability for damages due to:
- Non-observance of the installation instruction
- Improper use
- Installation by unqualified staff
- Non-professional installation by third parties
- Unauthorized modifications
- Technical modifications
Otherwise, our general terms and conditions as well as the terms of delivery of
WELBA GmbH and the legal regulations valid at the time of conclusion of the
contract are applicable.
We reserve the right to make technical changes in the context of improving the pro-
perties of use and further developments,
WARNING

1. Introduction
Page 6104781 - MRF-2 | MRH-2 - V2.4 - 22.07.2020
1.3 Appliance description
Controllers in the MRF-2 | MRH-2 series are universal four-channel PID temperature
controllers used to regulate and control industrial heating and cooling applications.
The four built-in controller components offer complex setting options for optimum
performance of the widest possible range of different control tasks. This means that
two-point and three-point control operations, continuous and pulsed PID control ope-
rations, multi-zonal control, absolute and difference temperature control, and other
complex control tasks up to and including compressor rotation in composite systems
are all possible.
The four autonomous control channels can be combined with external items such
as digital inputs, fault indicators, temperature alarms or button functions. The con-
troller architecture circuit diagram illustrates the full range of combination options
offered by the modular hardware concept.
The MRF-2 | MRH-2 has up to three analogue universal temperature sensor inputs,
one configurable analogue input and up to five digital inputs. Temperature sensor
types KTY, PT-100 (2 or 3 leads) or PT1000 can be connected to it. The analogue
input can be configured to 0 .. 10 V or 4 .. 20 mA.
External plant components such as heating systems, condensing units, control val-
ves, mixing valves, pumps, fans, signal transmitters etc. can be controlled through
up to five relay outputs or a freely configurable analogue output.
The operation and prior setting of the parameters of the MRF-2 | MRH-2 is divided
into four operating levels. Access rights for each level must be determined by the
plant engineering company. The programming level includes, for example, the para-
meters which the end user must be able to adjust during subsequent operation. As
interference with the basic configuration by the end user can result in dangerous
changes to functions, access to the other parameter levels is made more difficult by
the use of codes.
A type RS-485 interface is provided for communication with higher-level systems.
WELBA “KONSOFT”
The configuration software available as an option offers a simple way to set parame-
ters and update the temperature controller. The values measured by the three sen-
sors, the analogue input and the analogue output control signal can be transmitted
to a PC.
These instructions have been compiled with maximum care and attention. However,
their content does not constitute an assurance of product features.
The manufacture cannot be held liable for errors and may at any time make changes
serving technical progress. All rights reserved.

1. Introduction
104781 - MRF-2 | MRH-2 - V2.4 - 22.07.2020 Page 7
1.4 Model / type plate
These instructions apply to all controllers in the series MRF-2 | MRH-2. They contain
detailed descriptions for operation and parameter setting for all variants.
The type designation and the exact connection diagram for your controller can be
found on the controller as a connection sticker.
Example:
Controller type designation:
and
You can find a more detailed connection diagram for your controller on the accom-
panying device documentation.
Example:
LN
34 42
K1..K4: 230V AC 5A AC1
K1
13 14 23 24
K2 K3
31 41 44
K4
32A1 A2
104444
230V (50/60Hz)AC
MRF-2-001-A
76 5
i1 4 3 2 1 i2i3i4 8
Sonsor:
PT100-2/3L
KTY 81-210
-
+
RX/TX
RX/TXKTY 81-110
PT1000
A1 ANALOG
IN
DIGITAL IN-RS 485Sensor 1Sensor 2
GNDU/I
L N
34 42
K1..K4: 230V 5A 1AC AC
K1
13 14 23 24
K2 K3
31 41 44
K4
32A1 A2
104444
230V (50/60Hz)AC
MRF-2-001-A

1. Introduction
Page 8104781 - MRF-2 | MRH-2 - V2.4 - 22.07.2020
1.5 Items supplied
- Controller MRF-2 | MRH-2
- Holder
- Rubber seal
- Fixing screws
- Accompanying documentation
- Software “WELBA-KONSOFT” (optional)
1.6 Disposal
For the purposes of disposal, the device is classified as waste electronic equipment
within the meaning of European Directive 2002/96/EC (WEEE) and must not be in-
cluded with household waste. It must be disposed of through the correct channels.
Local and current legislation must be observed.
1.7 Cleaning instructions
The enclosure front (front foil) can be cleaned with usual detergents.
ATTENTION: The enclosure front is not resistant to aggressive acids
and alkalis, abrasive cleaners and cleaning with high-pressure
cleaners!
The use of these cleaners and cleaning methods may lead to damages!
NOTICE

1. Introduction
104781 - MRF-2 | MRH-2 - V2.4 - 22.07.2020 Page 9
1.8 Dimensions
MRF-2
1
2
3
4
°C
MRH-2
R5
1
2
3
4
°C
Panel cutout
87,5 x 66,5 mm
Pin size welding studs M3
96 x 53 mm
Panel cutout
87 x 56 mm

1. Introduction
Page 10 104781 - MRF-2 | MRH-2 - V2.4 - 22.07.2020
1.9 Technical data
Operating voltage
see circuit diagram sticker
Relay contact
depending on device - see circuit diagram sticker
max. switching current
depending on device - see circuit diagram sticker
max. switching voltage
depending on device - see circuit diagram sticker
Display
13 mm LED-Display, 3 digits
Display range
-99 .. 999
Number of inputs
2 or 3
Usable sensors
KTY 81-110
KTY 81-210
PT 100 (2- oder 3-Leiter)
PT 1000
Measurement range
- KTY 81-110
- KTY 81-210
- PT 100 - 2 Leiter
- PT 100 - 3 Leiter
- PT 1000
-50° .. +150°C
-50° .. +150°C
-99° .. +400°C
-99° .. +400°C
-99° .. +400°C
Digital inputs
up to 5 (via opto coupler)
Temperature alarms
2 (independently)
Control mode
two-step / three-step control
PID (continuous or pulsed)
Hysteresis
0,1 K .. 99,9 K freely adjustable
Housing MRF-2
(Front panel mount.)
Housing MRH-2
(Rear wall mount.)
- Front size 106 x 68 mm
- Front panel cut 87 x 56 mm
- Overall dimension 108 x 80 mm
- Front panel cut 87,2 x 66,2 mm
Installation conditions
Regulator is designed as ,built-in appliance‘
Degree of protection
- Housing front
- Rear
IP 64
IP 00
Electrical safety
Overvoltage category III, pollution degree I
Connection
Plug-in screw connections
for cables up to 2,5 mm²
Environment specifications:
- Operation temperature
- Storage temperature
- max. humidity
0° .. +50°C
-20° .. +70°C
75% (no dew)
Pollution degree
Electrically conductive pollution must not enter the
housing interior
Overvoltage category
CAT II
Technical data subject to change