Actuator controls AUMATIC ACExC 01.2 Modbus RTU

Transcription

1 Actuator controls AUMATIC ACExC 01.2 Modbus RTU To be used in combination with the operation instructions only! The present short instructions do NOT replace the operation instructions! They are only intended for persons already familiar with the operation instructions where safety instructions, assembly, operation and commissioning are already described in detail! The operation instructions must always be available. Short instructions FO connection

2 Table of contents Table of contents 1. Short description FO connection Basic information 2.2. Terminal compartment: open 2.3. FO cables: connect 2.4. Terminal compartment: close 3. Network topologies Line topology 3.2. Star topology 4. Corrective action LED indications 4.2. Troubleshooting Line and star topology 5. Technical data FO coupler 6. Appendix Calculation of achievable FO range 6.2. Measuring methods 6.3. Reference addresses 6.4. Literature Page

3 Short description 1. Short description AUMA actuator controls with FO connection are intended for use in optical fieldbus networks. The FO connection integrated in the electrical connection enables the conversion from electrical RS-485 signals into optical signals and vice versa. FO connection behaviour is transparent at the bus, i.e. control of AUMA actuators via bus is identical to control via copper cables (RS-485). Contrary to RS-485 based systems, different topologies are possible: Line topology Star topology Apart from the large distances, FO cables offer further advantages: In environments with electromagnetic interference Lightning arrester or overvoltage protection Equipotential earth bonding and earthing Galvanic separation of the actuator Use of common cable trenches for power and signal cables Prevention of interference emissions along the transmission line This allows for customised solutions and various applications such as water/waste water industries, tunnelling, power plants, thermal industry or telecontrol engineering. 3

4 FO connection 2. FO connection 2.1 Basic information Hazardous voltage! Risk of electric shock. Failure to observe this warning can result in death or serious injury. The connection must be carried out exclusively by suitably qualified personnel. Prior to opening: Disconnect both system and device from the mains. Observe basic information contained in this chapter. Observe safety instructions contained in the operation instructions pertaining to the actuator. Eye damage caused by open fibre optic cable ends! NEVER look directly into open cable ends or FO cable connections. Connection or receive problems when ignoring the installation instructions! Only use FO cable connection (connector types) with the wiring techniques indicated in these instructions. Only mount connector types with locking mechanisms in the defined position. Protect unused FO cable connections against contamination or dust with protective caps/plugs supplied by the factory. Connect incoming FO cable with the optical receiver, the outgoing FO cable with the optical sender. NOT vice versa! Do NOT kink FO cables! Observe bending radius of cable manufacturer. Cable and wire types Table 1: Cables and wires according todin VDE 0888 part 3: Core diameter Fibre Range Damping coefficient 62.5 µm or 50 µm 62.5/125 µm Multi-mode graded-index fibre 50/125 µm glass fibre 62.5/125 µm: 2,600 m 50/125 µm: 1,400 m Recommendation: < 3.0 db/km Remove outer sheathing of FO cable at a length of approx. 25 cm to enable ring wiring in the terminal compartment. Figure 1: Plug type FSMA Controls mounted to wall bracket In the event of heavy vibration of the valve, we recommend mounting the actuator controls separately from the actuator on a wall bracket. For information about the wall bracket, refer to operation instructions for the actuator. 4

5 FO connection 2.2 Terminal compartment: open Figure 2: Plug/socket connector: left KES, right KES flameproof [1] Cover [2] Screws for cover [3] O-ring [4] Terminal compartment: Type of protection Ex e [5] Terminal compartment: Type of protection Ex d [6] Frame Hazardous voltage! Risk of electric shock. Disconnect device from the mains before opening. 1. Loosen screws [2] and remove cover [1]. Terminal compartments [4] and [5] are designed either in type of protection Ex e (increased safety) or in type of protection Ex d (flameproof enclosure).hereby, the flameproof interior compartment of the actuator (Ex d) remains closed. 2. Insert cable glands with Ex e approval and suitable for connection cables. The enclosure protection IP stated on the name plate is only ensured if suitable cable glands are used. Example: Name plate shows enclosure protection IP Seal cable entries unused cable entries with approved plugs suitable for the required protection type. 4. Remove cable sheathing and insert the wires into the cable glands. 5. Fasten cable glands with the specified torque to ensure required enclosure protection. 5

6 FO connection 2.3 FO cables: connect 1. Remove safety circlip and take FO coupler off top head rail. Figure 3: FO coupler on top head rail 2. Place FO coupler on fixing plate in "parking position" Figure 4: FO coupler in "parking position" 3. Insert FO cables through cable glands. 4. Link FO connectors crosswise: Optical output of actuator 1 with optical input of actuator 2. Optical input of actuator 1 with optical output of actuator 2. Figure 5: Connection example 6

7 FO connection 2.4 Terminal compartment: close Figure 6: Plug/socket connector: left KES, right KES flameproof [1] Cover [2] Screws for cover [3] O-ring [4] Terminal compartment: Type of protection Ex e [5] Terminal compartment: Type of protection Ex d [6] Frame 1. Clean sealing faces of cover [1] and housing. 2. Plug/socket connector designed as KES flameproof: Preserve joint surfaces with an acid-free corrosion protection agent. 3. Check whether O-ring [3] is in good condition, replace if damaged. 4. Apply a thin film of non-acidic grease (e.g. petroleum jelly) to the O-ring and insert it correctly. Flameproof enclosure, danger of explosion! Risk of death or serious injury. Handle cover and housing parts with care. Joint surfaces must not be damaged or soiled in any way. Do not jam cover during fitting. 5. Fit cover [1] and fasten screws [2] evenly crosswise. 7

8 Network topologies 3. Network topologies 3.1 Line topology When connecting several field devices (actuators) in a network, the structure is called network topology. AUMA offers different network topologies. Figure 7: Structure for line topology Max. FO cable range in km (observe technical data!) [1] FO T-coupler within electrical connection of ACExC 01.2 [2] FO PP-coupler within DCS (imperatively required) [3] FO PP-coupler for any Modbus RTU field device [4] Any Modbus RTU field device Table 2: Number of FO devices (actuators) to be connected in series Baud rate [kbit/s] Maximum number of FO devices Special features of line topology The optical signal is converted into an electrical signal at each device. Prior to transmission to the next device, the electrical signal is converted into an optical signal. Interruption of an FO cable (case A) or failure of an FO connection board (case B) results in loss of control for the subsequent actuators: Case A (standard) Case B (option) As soon as the electrical connection is removed from the ACExC 01.2, FO connection of this actuator is no longer available. As a consequence, communication with the subsequent actuators is lost. To prevent this, FO connection used in the ACExC 01.2 can also be externally supplied with 24 V DC. As soon as the actuator is switched off (motor voltage), the FO connection board of this actuator is no longer available. As a consequence, communication with the 8

9 Network topologies subsequent actuators is lost. To prevent this, the complete ACExC 01.2 can be externally supplied with 24 V DC. 3.2 Star topology Figure 8: Structure for star topology Max. FO cable range in km (observe technical data!) [1] FO PP-coupler within electrical connection of ACExC 01.2 [2] LWL Stich-Koppler in der Leittechnik (zwingend erforderlich) [3] LWL Stich-Koppler für Beliebiges Modbus RTU Feldgerät [4] Any Modbus RTU field device Table 3: Number of FO devices (actuators) to be connected in series Baud rate [kbit/s] Maximum number of FO devices Special features of star topology Failure of an FO cable section or of an actuator's FO connection board has no impact on the operability of the remaining actuators. 9

10 Corrective action 4. Corrective action 4.1 LED indications Figure 9: LEDs on FO coupler [BA] [U] L Bus active (yellow) Operation (green) Table 4: Summary of functions LED Colour BA U L yellow green Function LED flackert: Data from RS485 channel are transmitted via the optical interface. LED is illuminated: Power supply (24 V DC) for FO coupler is available Internal operating voltage (5 V) is available. 4.2 Troubleshooting Line and star topology LEDs on the FO couplers provide important information for troubleshooting. The following tables of this chapter provide basic steps for troubleshooting and elimination via these LEDs. Furthermore, different fieldbus interface states can be requested via the ACExC 01.2 display (Menu Diagnostic M0022). For further information, please refer to Manual (Device integration fieldbus) AC 01.2/ACExC Table 5: Troubleshooting table 1 2 Can actuator be controlled via fieldbus? Green LED [U L ] illuminated? Yes No Yes No Causes and remedies Continue with 4 Continue with 2 FO coupler supplied with voltage (24 V DC). Continue with 4 Continue with 3 10

11 Corrective action 3. 4 Verify power supply (24 V DC) of the FO coupler: Is yellow LED [BA] flickering? Power supply (24 V DC) available? Power supply (24 V DC) not available? Yes Causes and remedies Possible causes and remedies: FO coupler is defective Replace coupler. Remedies: Check fuses within ACExC Restore power supply. Possible causes: Sender on coupler defective FO connection of sender not operable No Possible causes: Slave not properly connected Slave defective Master defective FO coupler receiver or FO connection of receiver defective Is the required FO coupler (BARTEC order no.: WP/6000 or /4000) installed at the master? 11

12 Technical data 5. Technical data Information The following technical data includes standard and optional features. For detailed information on the customer-specific version, refer to the order-relevant data sheet. This data sheet can be downloaded from the Internet at in German and English (indication of commission number required). 5.1 FO coupler Explosion protection (in accordance with EN to EN 50020) Ex de [ib] IIC EC type examination certificates Mounting: TÜV 99 ATEX 1404 Coupler: PTB 97 ATEX 1068 U X FO connection Channels (optical) Data rate Transmission type Fibre Optical budget Network range max. Wave length Operation temperature Power supply Indications (LEDs) FSMA FO plug/socket connector For line topology: 1 x IN/OUT or 2 x IN/OUT For star topology: 1 x IN/OUT Maximum kbit/s Half-duplex Multi-mode, 62.5 (50)/125 µm 8 db at 62.5 µm 4 db at 50 µm fibre 62.5 µm glass fibre: 2,600 m (FO cable damping max. 3.0 db/km, without additional damping) 50 µm glass fibre: 1,400 m (FO cable damping max. 3.0 db/km, without additional damping) 850 nm 25 C to +60 C 24 V DC/75 ma, internally supplied via power supply unit of ACExC For line and star topology: External power supply of the ACExC 01.2 with 24 V DC/500 ma possible. Only when the ACExC 01.2 is operated on external voltage supply will the bus remain uninterrupted in case of a loss of operating voltage. LED UL (green) = device ready for operation (power supply available) LED BA (yellow) = bus active: Data is received via the RS485 channel. Suitable bus systems Required FO modules for the master Modbus RTU Bartec, to be purchased from AUMA or FO coupler for line or star topology - 1 channel FO PP coupler (BARTEC order no.: WP/6000) (AUMA order no.: K ) - 2 channel FO T coupler (BARTEC order no.: WP/4000) (AUMA order no.: K ) Maximum number of FO actuators coupler at the master (at 57.4 kbit/s) 12

13 Appendix 6. Appendix 6.1 Calculation of achievable FO range L max P a K Anz K a L Maximum achievable cable length of FO cable/wire[km] Optical budget [db] (connectible power). Damping of the couplings [db]. Typical values for FST = db, for FSMA = db. Additional number of FO couplings within the FO cable between two actuators (excluding FO couplings at electrical connection of AUMA actuators; damping of these actuators is already included in the optical budget). Specific cable damping [db/km], refer to technical data of the FO cable. Example 1 Standard set-up, i.e. no additional couplings: P = 8 db; Anz K = 0; a K = 0.6 db; a L = 3.0 db/km L max = 2,600 m Example 2 Two couplings within the cable: P = 8 db; Anz K = 2; a K = 0,6 db; a L = 3,0 db/km L max = 2,200 m Figure 10: Example: Two couplings within the cable [1] 1 st FSMA a K coupling = 0.6 db [2] 2 nd FSMA a K coupling = 0.6 db 13

14 Appendix 6.2 Measuring methods Figure 11: Damping measurement 6.3 Reference addresses 6.4 Literature Required FO module for the master: BARTEC Top Holding GmbH Max-Eyth-Straße 16 D Bad Mergentheim Germany Tel.: Fax: FO cables and wires: Network reliability despite multiple points of failure eks Engel GmbH & Co. KG Schützenstr. 2, Wenden-Hillmicke, Tel.: , Christoph P. Wrobel Optische Übertragungstechnik in der Praxis Grundlagen, Komponenten, Installation, Anwendungen Hüthig Verlag ISBN

15 Appendix 15

16 AUMA Riester GmbH & Co. KG P.O.Box 1362 D Muellheim Tel Fax riester@auma.com Y /003/en/1.13 For detailed information on AUMA products refer to the Internet: