EN SMI2 RS485 Display User guide SMI2_2016.05_0113_EN akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: +49 (0) 511 16 59 672-0 · www.akytec.
Contents 1 Safety guidelines ............................................................................................................................................ 2 2 Intended use ................................................................................................................................................... 3 3 Specification ...................................................................................................................................................
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.
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.
Specification 3 Specification Table 3.1 Specification Power supply Power consumption, max. Protocol Interface Baud rate Display Character height Display colour IP Code Dimensions Weight Protection class Ambient temperature Storage temperature Humidity Galvanic isolation 12 / 24 (10.5…30) V DC 1.5 W Modbus RTU/ASCII, akYtec RS485 (2-wire bus) 2.4…115.2 kBit/s LED, 7-segment display, 4-digit 14 mm red front IP65, rear IP20 48 x 26 x 65 mm approx.
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.
Installation and commissioning 5 5.1 Installation and commissioning 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.
Installation and commissioning – – Check connection with the device (menu “Device -> Check connection”) A new device can be configured immediately. As soon as the parameter Protocol type (t.Pro) is changed and saved, the communication with the device is interrupted. To enable the SMI2 configuration software to communicate with the device again, the “Factory settings” mode must be temporarily activated. 5.
Operation 6 Operation The operating mode is automatically enabled as soon as the device is supplied with power. The device supports master and slave modes. The mode can be set in the parameter dEv.r (see Table D3). The factory setting is 0 (slave). 6.1 Slave mode In the slave mode the SMI2 receives the data from the master and processes it in accordance with the operating parameters. The results are shown on the display. 6.2 Master mode To enable the master mode, the parameter dEv.r must be set to 1.
Operation U-Logic (parameter AL.t = 2) − the display flashes if the current value lies outside the interval (Т – Δ) < t < (T + Δ). If the parameter AL.t = 0, the function is deactivated. For the String (dAtA = 3) and Image (dAtA = 4) data types alarm logic is not implemented. 6.5 Error display Table 6.2 Error display Display |- - | dt.LL dt.hh ► NOTICE Cause There is no data packet within the defined time (parameter t.out). Transmitted value is too small, e.g.
Maintenance 7 Maintenance The maintenance includes: – – – cleaning the housing and the terminals from dust, dirt and debris checking the fastening of the device checking the wiring (connecting leads, fastenings, mechanical damage) The device should be cleaned with a damp cloth only. No abrasives or solvent-containing cleaners may be used. The safety guidelines in Section 1 must be observed when carrying out maintenance. akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.
Transportation and storage 8 Transportation and storage Pack the device in such a way as to protect it reliably against impact for storage and transportation. The original packaging provides optimum protection. If the device is not taken immediately after delivery into operation, it must be carefully stored at a protected location. The device should not be stored in an atmosphere with chemically active substances.
Scope of delivery 9 – – – – – Scope of delivery SMI2 Gasket Mounting nut User guide CD with configuration software 1 1 1 1 1 akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: +49 (0) 511 16 59 672-0 · www.akytec.
Appendix A Dimensions RE SET Appendix A Dimensions 26 65 48 10 Fig. A1 To prevent the device spinning, the borehole in the front panel must correspond to the dimensions in Fig. A2. Fig. A2 akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: +49 (0) 511 16 59 672-0 · www.akytec.
Appendix B Electrical connection Appendix B Electrical connection SMI2 + 1 24 V DC 2 - 3 B/- 4 А/+ RS485 Fig. B1 akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany · Tel.: +49 (0) 511 16 59 672-0 · www.akytec.
Appendix C Communication protocol Appendix C Communication protocol The device supports the following protocols: Modbus RTU, Modbus ASCII and akYtec. The protocol akYtec is an internal protocol and is used by the configuration software. C.1 Addressing The device receives an individual address so that it can be addressed selectively. The broadcast address is a reserved address that can be used to address all devices.
Appendix D Functions and data transfer Appendix D Functions and data transfer The following functions are supported in the Modbus protocol: – 03, 04 (read registers) – read one or more registers; – 06 (write single register) – write one register; – 16 (write multiple registers) – write block of registers; – 17 (report server ID) – read the device name and the firmware version. Example. Function 17 (Report Server ID) This function is used to read the device name and the firmware version.
Appendix D Functions and data transfer D.1 Parameters Comment: Default values are printed in bold. Table D3 Configuration parameters Parameter Device name dEv Firmware version vEr Register no. (dec) 0-1 2-3 Baud rate bPS 4 Data bits Len Parity PrtY 5 Stop bits Sbit Response delay rS.dL Time-out t.out Device address Addr Protocol t.Pro 7 6 8 Values Device information SMI2 X.YY Network parameters 0 – 2.4 kBd 1 – 4.8 kBd 2 – 9.6 kBd 3 – 14.4 kBd 4 – 19.2 kBd 5 – 28.8 kBd 6 – 38.4 kBd 7 – 57.
Appendix D Functions and data transfer 3 – 0x0003 4 – 0x0004 Operating parameters 0 – Int 1 – Word 2 – Float 3 – String[8] 4 – Image 0 (- - - -) 1 (- - - -.) 2 (- - -.-) 3 (- -.- -) 4 (-.- - -) 200 … 9999 ms Modbus function *) SLA.F 44 Data type dAtA 17 Decimal point position dP 18 Flash interval PF Alarm logic AL.t 19 Setpoint C.SP Hysteresis (Δ) HYST 21-22 0 – off 1 – ∩-Logic 2 – U-Logic -999 … 0.0 … +9999 23-24 0 … 10.
Appendix D Functions and data transfer Comments *) Available only in master mode **) The display supports the following characters: ̶ ̶ Figures 0 … 9; Upper and lower case letters of the Latin alphabet; Symbols " ", "_", "–", "." ̶ Examples: 1) char[8] = "A.B.C.D"; 2) char[8] = "ABCD"; 3) char[8] = "ABCD." ***) 4 bytes data shows the status of each display segment. The first byte is reserved for the first digit from the right.
Appendix D Functions and data transfer D.4 Symbol presentation Table D7 ASCII code and the symbol presentation ASCIICode .0 .1 .2 .3 .4 .5 .6 .7 .8 .9 .A .B .C 2. 3. D.5 – . – . .F 1 2 3 4 5 6 7 8 9 0 1 A 2 B 3 C 4 D 5 E 6 F 7 G 8 H 9 I J K L M N O A Q b R C S d T E U F V G W H X i Y J Z K L M N O _ Q a R b S c t d U e V f W g X h Y i Z j p a q b r c s d t E u F v G w h x i y J z P Q r S t U V W X Y Z P P 6. 7.
