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Summary of Contents for ZIEHL-ABEGG MODBUS RTU System
- Page 1 MODBUS RTU System Technical description and installation Technical information COMM Parameter MB Holding Register Address Access RW, NW Minimum value Maximum value 65535 Bit [15:8] ……... MODBUS R-TIL08_01-GB 1215 Part.-No.
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Page 2: Table Of Contents
Ziehl-Abegg MODBUS-RTU Description ........ -
Page 3: General Description
Technical information MODBUS RTU System – model series General description 1 General description Intended use This technical information is only complete together with the corresponding operating instruc- tions of the connected components. Therefore the safety information in the operating instruc- tions of the connected components must also be observed. -
Page 4: Hardware Installation (Bus Topology)
- Main channel (between control unit and passive repeaters with max. 63 fans) - End channel (at the output of a passive repeater with max. 63 fans) Attention: If the "Ziehl-Abegg-Auto-addressing" is to be used, no repeater may be used because the repeaters cannot pass on the auto-addressing. -
Page 5: Modbus Structuring
Technical information MODBUS RTU System – model series Hardware installation (Bus topology) Picture 3: General two-wire topology In addition to the two signal wires, the MODBUS line can have two other wires for the 24V supply. This voltage is always required to supply the terminals of the "AXG" type series. The voltage can be fed in by the first slave for example. -
Page 6: Physical Modbus Transmission Layer
Technical information MODBUS RTU System – model series Physical MODBUS transmission layer 4 Physical MODBUS transmission layer Number of devices on a Bus segment One channel, unless otherwise specified, max. consist of 63 active nodes • MODBUS-master • MODBUS-slave •... -
Page 7: Line Termination
There are different ways to avoid dropping below the specified total resistance of 54 Ω of a network channel: 1. Insert external resistances (Ziehl-Abegg 150 Ω) on the bus 2. Use internal resistances (Ziehl-Abegg 150 Ω) at the bus connections of the repeaters 3. a combination of internal and external resistors R-TIL08_01-GB 1215 Part.-No. -
Page 8: Bias Of The Line
Technical information MODBUS RTU System – model series Physical MODBUS transmission layer Information The internal terminations of the repeaters are not activated in the factory setting. Those of the display and operating devices are activated in the factory setting. If a resistance is activated at the input or output, it is 150 Ω... -
Page 9: Rj45 Pin Assignment (Acc. To Modbus Specification)
Technical information MODBUS RTU System – model series Physical MODBUS transmission layer 4.5.1 RJ45 pin assignment (acc. to MODBUS specification) 2W - MODBUS and RJ45 connection FRONT Common Picture 9: RJ45 MODBUS assignment Pair assignment patch cable CAT5/7 RJ45 Pair number... -
Page 10: Shielding
Technical information MODBUS RTU System – model series MODBUS transmission layer 4.5.3 Shielding The use of shielded cables is normally not demanded but offers high protection against electro- magnetic interferences, especially high frequencies. However, the effectiveness of the shield depends on careful installation of the line. -
Page 11: Communication Parameters
Technical information MODBUS RTU System – model series MODBUS transmission layer Master Slave Initiierung der Anforderung Funktionscode Anforderungsdaten Ausführung der Aktion Initiierung der Antwort Funktionscode Antwortdaten Empfang der Antwort MODBUS-Transaktion (ohne Fehler) Master Slave Initiierung der Anforderung Funktionscode Anforderungsdaten Fehlererkennung in Aktion... -
Page 12: Setting The Slave Address
Technical information MODBUS RTU System – model series MODBUS transmission layer 5.2.2 Setting the slave address The members are delivered with slave address 247 (unless specified otherwise). The slave addresses must always be set to ensure that the bus master can access the slaves connected to the bus line. -
Page 13: Ziehl-Abegg Modbus-Rtu Description
6 Ziehl-Abegg MODBUS-RTU Description Introduction The Ziehl-Abegg device series are equipped with an RS-485 interface (A [D+], B [D-], GND). The device can be controlled and parameterised by the MODBUS-RTU protocol by using this interface. The MODBUS-RTU protocol implementation of the device complies with the standards as described in the "MODBUS Application Protocol Specification 1.1". - Page 14 Technical information MODBUS RTU System – model series Ziehl-Abegg MODBUS-RTU Description A-G-247NW + 3,3 V IRDA-RXD IRDA-TXD IRDA-SD (D+) (D-) + 5 V ECblue MODBUS ECblue MODBUS 3...63 MODBUS MODBUS MODBUS MODBUS (RS-485) (RS-485) (RS-485) (RS-485) (D+) (D-) (D+) (D-)
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Page 15: Enclosure
Technical information MODBUS RTU System – model series Enclosure 7 Enclosure Examples for Bus signals (oscilloscope measurements) Request node without RT without FS Request node with RT and FS RT = Terminations resistance (150 Ω) FS = Fail safe termination... -
Page 16: Manufacturer Reference
Technical information MODBUS RTU System – model series Enclosure Manufacturer reference Our products are manufactured in accordance with the relevant international regulations. If you have any questions concerning the use of our products or plan special uses, please contact: Ziehl-Abegg AG Heinz-Ziehl-Straße...
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