akYtec SMI2 User guide
EN
SMI2_2016.05_0113_EN
SMI2
RS485 Display
User guide
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: +49 (0) 511 16 59 672-0 · www.akytec.de
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Contents
1
Safety guidelines ............................................................................................................................................ 2
2 Intended use ................................................................................................................................................... 3
3 Specification ................................................................................................................................................... 4
4 Functional description ................................................................................................................................... 5
5 Installation and commissioning .................................................................................................................... 6
5.1 Installation ................................................................................................................................................ 6
5.2 Programming ........................................................................................................................................... 6
5.3 Configuration ........................................................................................................................................... 6
5.4 Configuration check ................................................................................................................................. 7
5.5 “Factory settings” mode ........................................................................................................................... 7
6 Operation ......................................................................................................................................................... 8
6.1 Slave mode .............................................................................................................................................. 8
6.2 Master mode ............................................................................................................................................ 8
6.3 Operating parameters .............................................................................................................................. 8
6.4 Alarm logic ............................................................................................................................................... 8
6.5 Error display ............................................................................................................................................. 9
7 Maintenance .................................................................................................................................................. 10
8 Transportation and storage ......................................................................................................................... 11
9 Scope of delivery .......................................................................................................................................... 12
Appendix A Dimensions ................................................................................................................................... 13
Appendix B Electrical connection ................................................................................................................... 14
Appendix C Communication protocol ............................................................................................................. 15
Appendix D Functions and data transfer ........................................................................................................ 16
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: +49 (0) 511 16 59 672-0 · www.akytec.de
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Safety guidelines
1 Safety guidelines
Please read through the user guide carefully before commissioning the device. Damages that arise from
non-observance of the guidelines in the user guide shall be devoid of any liability.
– The device may only be used in the manner described in this user guide.
– No technical modifications may be made to the device.
– The device may not be used if the environmental conditions (temperature, humidity etc.) are not within
the limits indicated in the specification.
– The device may not be used in explosive areas and there may be no chemically active substances in the
atmosphere.
– The device should only be cleaned with a damp cloth. No abrasives or solvent-based cleaners should be
used.
Non-observance of the safety guidelines may result in damage to the device and injury to users
.
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: +49 (0) 511 16 59 672-0 · www.akytec.de
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Intended use
2 Intended use
The device is intended for use in a RS485 network and supports the protocols Modbus RTU, Modbus ASCII
and akYtec. It can operate either as a slave or a master.
The field of application of the device includes the control and monitoring of industrial processes. The device
can be used in automated systems as a primary or secondary display.
The device may only be operated
– properly installed and
– in accordance with the specification.
Improper use
– The SMI2 may not be used for medical devices that sustain, monitor or otherwise affect human life
or health.
– The device may not be used in potentially explosive environment.
– The device may not be used in an atmosphere with chemically active agents.
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: +49 (0) 511 16 59 672-0 · www.akytec.de
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Power supply
12 / 24 (10.5…30) V DC
Power consumption, max.
1.5 W
Protocol
Modbus RTU/ASCII, akYtec
Interface
RS485 (2-wire bus)
Baud rate
2.4…115.2 kBit/s
Display
LED, 7-segment display, 4-digit
Character height
14 mm
Display colour
red
IP Code
front IP65, rear IP20
Dimensions
48 x 26 x 65 mm
Weight
approx. 30 g
Protection class
III
Ambient temperature
-25…+55 °C
Storage temperature
-40…+70 °C
Humidity
up to 80% (non-condensing)
Galvanic isolation
yes
Specification
3 Specification
Table 3.1 Specification
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: +49 (0) 511 16 59 672-0 · www.akytec.de
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PS
Display
SMI2
Converter
TTL
↔RS485
Micro-
8 8 8 8
RESET
RS485
controller
10.5...30 V DC
Functional description
4 Functional description
A 4-digit, 7-segment LED display (red) with 14 mm character height displays data received from the RS485
network, error messages and/or configuration parameters of the device.
The secondary voltage source with galvanic isolation guarantees a stable power supply to the device and
offers protection against polarity reversal.
The RESET button is positioned on the cylindrical surface of the device. The button enables to retrieve the
configuration parameters and to restore factory settings, if necessary.
The device has the following functions:
– receiving data from a master device in the slave mode
– querying data from a slave device in the master mode
– processing received data according to the set parameters
– displaying transmitted value
– displaying transmitted value of a type Int or Word with the set number of decimal points
– optional flashing function
– displaying errors if the data transfer is faulty or the received value cannot be displayed (see 6.5)
– displaying configuration parameters of the device
– modifying configuration parameters according to data received from the master
PS – Power supply
Fig. 1 Block diagram
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: +49 (0) 511 16 59 672-0 · www.akytec.de
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Switch panel
Gasket
Nut
Enclosure
Installation and commissioning
5 Installation and commissioning
5.1 Installation
The SMI2 is designed for switch panel mounting in a borehole of Ø22.5 mm (see Appendix A for dimensions).
Carefully position the supplied gasket on the display rear surface. Insert the cylindrical part of the device into
the borehole and tighten the nut from the rear side of the switch panel. Connect the device to the auxiliary
voltage and signal cables in accordance with Appendix B.
The factory settings can be changed before assembly if necessary (see Appendix D.3). For this purpose the
device must be connected to the RS485 interface of the programming device (PC) and to the auxiliary power
supply. For further details see 5.3.
Fig. 2 Mounting
5.2 Programming
The display may only be programmed in the RS485 network with the communications protocol Modbus
RTU/ASCII or akYtec in the slave mode. The protocol type is specified in the parameter Protocol type (t.Pro)
(see Table D3).
The configuration software „Konfigurator SMI2“ allows to configure the device via the akYtec protocol. The
CD with the configuration software is supplied with the device. Further steps are given in 5.3.
The parameters are divided into two main groups: the configuration parameters and transmitted data.
The configuration parameters are device information, network parameters and operating parameters. The
latter determine how the device processes the received information.
The configuration parameters are constants and are saved in the permanent memory (Table D3).
The transmitted data are variable data exchanged between the master and slave. These are not saved (Table D4).
Each parameter has a name consisting of Latin letters (up to four), which can be separated by points.
5.3 Configuration
Required steps for configuration:
– Connect a USB/RS485 or RS232/RS485 converter (not supplied) to the PC
– Connect the display to the 24 V DC power supply and to the RS485 terminals of the converter according
– Switch on auxiliary voltage
– Install and start SMI2 configuration software
– In the menu select “Device -> Port configuration…“ and set the parameters to the device factory settings
to Fig. B1
(see 5.5)
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: +49 (0) 511 16 59 672-0 · www.akytec.de
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