ST RE71 User manual

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temperature controller
RE71
user’s manual

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CONTENTS
1. APPLICATION ................................................................... 5
2. CONTROLLER SET .............................................................. 5
3. BASIC REQUIREMENTS, OPERATIONAL SAFETY .......................... 6
4. INSTALLATION .................................................................. 6
4.1. Controller Installation ............................................................6
4.2. Electrical Connections ..........................................................8
4.3. Installation Recommendations ..............................................9
5. STARTING TO WORK ......................................................... 10
6. SERVICE ........................................................................ 10
6.1. Programming Controller Parameters ..................................12
6.2. Programming Matrix ............................................................13
6.3. Setting Change ...................................................................14
6.4. Parameter Description ........................................................14
7. CONTROL ....................................................................... 17
7.1. ON-OFF Algorithm ..............................................................17
7.2. Innovative SMART PID algorithm ........................................18
8. ALARMS ........................................................................ 20
9. ADDITIONAL FUNCTIONS .................................................... 21
9.1. Displaying the controller signal ..........................................21
9.2. manual Control ....................................................................22
9.3. Manufacturer’s Setting ........................................................22
10. ERROR SIGNALLING .......................................................... 23
11. TECHNICAL DATA ............................................................. 24
12. KONTROLLER EXECUTION CODES .......................................... 27
13. MAINTENANCE AND GUARANTEE ........................................... 29

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1. APPLICATION
The RE71 controller is destined for the temperature control in plastics,
food, dehydration industries and everywhere when the temperature sta-
bilizing is necessary.
Main features of the RE71 controller:
ldirect co-operation with resistance thermometers (RTD) or thermo-
couple (TC) sensors,
ltwo-stage control acc. to the PID or ON-OFF algorithm,
lone control output or alarm, relay output with make-and-break
configuration, allowing to the direct control of low power objects
An innovative SMART PID algorithm has been implemented in the
controller.
2. CONTROLLER SET
The delivered controller set is composed of:
1. RE71 controller ................................................ 1 pc
2. Plug with 6 screw terminals............................. 1 pc
3. Plug with 8 screw terminals............................. 1 pc
4. Screw clamp to fix the controller in the panel... 4 pcs
5. Seal.................................................................. 1 pc
6. User’s manual.................................................. 1 pc
When unpacking the controller, please check whether the type and ex-
ecution code on the data plate correspond to the order.

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3. BASIC REQUIREMENTS,
OPERATIONAL SAFETY
In the safety service scope, the controller meets to requirements of the
EN 61010-1 standard.
Observations Concerning the Operational Safety:
· All operations concerning transport, installation, and commissioning
as well as maintenance, must be carried out by qualified, skilled
personnel, and national regulations for the prevention of accidents
must be observed.
· Before switching the controller on, one must check the correctness
of connections to the network.
· The removal of the controller casing during the guarantee contract
period may cause its cancellation.
· The controller fulfills requirements related to electromagnetic
compatibility in the industrial environment
· When connecting the supply, one must remember that a switch or
a circuit-breaker should be installed in the room. This switch should
be located near the controller, easy accessible by the operator, and
suitably marked as an element switching the controller off.
· Non-authorized removal of the casing, inappropriate use, incorrect
installation or operation, creates the risk of injury to personnel or
meter damage.
For more detailed information, please study the User’s Manual.
4. INSTALLATION
4.1. Controller Installation
Fix the controller in the panel, which the thickness should not exceed
15 mm, by means of four screw clamps acc. the fig. 1.

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Fig. 1. Controller fixing
Fig. 2. Controller overall dimensions
The panel cut-out should have 45+0,6 x 45+0,6 mm dimensions.
The controller must be introduced from the panel front with disconnec-
ted supply voltage. Before the insertion into the panel, one must check
the correct placement of the seal.
After the insertion into the hole, fix the controller by means of screw
clamps.
Controller overall dimensions are presented on the fig. 2.

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4.2. Electrical Connections
Make electrical connections to terminal strip and next, insert strips
into the controller sockets.
The controller has two separable terminal strips. One strip enables
the connection of the supply and outputs by a wire of 2.5 mm2cross-
section, the second strip enables input signal connections by a wire
of 1.5 mm2cross-section.
Fig. 3. View of controller connection strips.
RTD Pt100,
in 2-wire system
RTD Pt100,
in 3-wire system
thermocouple
Fig. 4. Connection of input signals.

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Fig. 5. Connection of the supply and load circuit.
Supply Output - Relay Output – binary voltage
vor SSR control
4.3. Installation Recommendations
In order to obtain a full fastness against electromagnetic noise in an
environment with unknown noise level, it is recommended to observe
following principles:
– do not supply the controller from the network, in the proximity of
devices generating high pulse noise and do not apply common
earthing circuits,
– apply network filters,
– apply metallic shields in the shape of tubes or braids to conduct
supplying wires,
– wires leading measuring signals should be twisted in pairs, and for
resistance sensors in 3-wire connection, twisted of wires of the same
length, cross-section and resistance, and led in a shield as above,
– all shields should be one-side earthed or connected to the protec-
tion wire, the nearest possible to the controller,
– apply the general principle, that wires leading different signals
should be led at the maximal distance between them (no less than
30 cm), and the crossing of these groups of wires made at right
angle (90°).

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5. STARTING TO WORK
After switching the supply on, the controller carries out the display test,
displays the re71, inscription, the program version and next, displays
the measured value.
A character message informing about abnormalities may appear on the
display (table 4). The On-Off control algorithm with hysteresis given in
the table 2 is set by the manufacturer.
Changing the Set Value
The set point value is displayed after pressing the or the
button, then the SP diode is lighting. In order to change the set value,
one must press the or button again (fig. 6). The beginning
of the change is signaled by the dot flickering on the display. One must
accept the new set point value by the button in the laps of 30
seconds from the last pressure of the or button, in the
opposite case, the controller transits to display the measured value with
the previously set up set point value.
Fig. 6. Change of the set value.
6. SERVICE
The controller service is presented on the Fig. 7.