Actuator controls AUMATIC AC 01.2 Modbus RTU

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Actuator controls

AUMATIC AC 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!

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Page

3 1. Short description... 4 2. FO connection... 4 2.1. Basic information 5 2.2. FO terminal compartment: open

5 2.3. FO cables: connect

7 2.4. FO terminal compartment: close

8 3. Network topologies... 8 3.1. Line topology 9 3.2. Star topology 10 3.3. Loop topology (two-fibre loop)

11 4. Corrective action... 11 4.1. LED indications 12 5. Technical data... 12 5.1. FO connection board: 14 6. Appendix... 14 6.1. Measuring methods 14 6.2. Reference addresses 14 6.3. Literature Table of contents

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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 passive at the bus, i.e. control of AUMA actuators is via bus is made in the same way as for a connection via copper cables (RS-485). Contrary to RS-485 based systems, different topologies are possible:

● Line topology ● Star topology

● Redundant loop 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 for various applications such as water/waste water industries, tunnelling, power plants, thermal industry or telecontrol engineering.

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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 using 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

protec-tive 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 DIN VDE 0888 part 3: Multi-mode 62.5 (50)/125 μm

Single-mode 9/125 μm Fibre

62.5 (50)/125 μm glass fibre (multi-mode): 2,500 m 9/125 μm glass fibre (single-mode): 15 km

Range

Recommendation:< 2.0 dB/km (multi-mode) or < 0.4 dB/km (single-mode)

Damping coefficient

Remove outer sheathing of FO cable at a length of approx. 42 cm to enable loop wiring in the terminal compartment.

Figure 1: Plug types: ST or SC (depending on version)

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.

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2.2 FO terminal compartment: open

The AUMA plug/socket connector (SDE bus) is equipped with a connection board for connecting the fibre optic cables. When removing the cover [1], the connection board is easily accessible.

Figure 2: AUMA plug/socket connector SDE bus

[1] Cover (FO terminal compartment) [2] Screws for cover

[3] O-ring

[4] Cable entries for fibre optic cables [5] Blanking plugs

1. Loosen screws [2] and remove cover [1]. 2. Insert cable glands suitable for FO cables.

➥ The enclosure protection IP… stated on the name plate is only ensured if suita-ble casuita-ble glands are used.

➥ Example: Name plate for enclosure protection IP 68.

3. Seal unused cable entries [4] with suitable blanking plugs [5]. 4. Insert the wires into the cable glands.

2.3 FO cables: connect

Figure 4: Connection board with connector types SC (left), ST (right)

[1] Channel 1

[2] Channel 2 (for loop or line topology) [3] Protective cap/plug

TX Optical output RX Optical input

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A label on the connector indicates the wiring (fibre type, connector type). Table 2: Markings on the label

FO cable connector type FO cable fibre type

ST = Straight tip (BNC connector) SM = Single-mode

SC = Subscriber connector (Snap-in connector) MM = Multi-mode

FO cables: connect

1. Install cables within the terminal compartment in a loop to achieve the highest possible bending radius.

Figure 5: Wiring within in the terminal compartment

2. Measure and record the damping of the FO cables before connection. 3. Link connectors crosswise:

Output TX of actuator 1 to input RX of actuator 2 Input RX of actuator 1 to input TX of actuator 2 Figure 6: Example of ST BNC connector

➥ Make sure that:

- the bayonet-type connection of connector type ST is properly engaged - the straight tip of connector type SC fully mates the FO cable socket.

4. Protect unused FO cable connections against contamination or dust with pro-tective caps/plugs supplied by the factory.

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2.4 FO terminal compartment: close

Figure 7: AUMA plug/socket connector SDE bus

[1] Cover

[2] Screws for cover [3] O-ring

[4] Cable entries for fibre optic cables [5] Blanking plugs

1. Clean sealing faces of cover [1] and housing.

2. Apply a thin film of non-acidic grease (e.g. petroleum jelly) to the sealing faces. 3. Check whether O-ring [3] is in good condition, correctly insert O-ring.

4. Fit cover [1] and fasten screws [2] evenly crosswise.

5. Fasten cable glands with the specified torque to ensure the required enclosure protection.

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3. Network topologies

When connecting several terminal devices (actuators) in a network, the structure is called network topology. AUMA offers 3 different network topologies.

3.1 Line topology

Figure 8: Structure for line topology

Max. FO cable range in km (observe technical data!) [1] Channel 1

[2] Channel 2

[3] Any Modbus RTU device [4] FO coupler at DCS (mandatory)

[5] FO coupler for any Modbus RTU field device 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 a loss of control for the subsequent actuators:

Case A (standard)

As soon as the electrical connection is removed from the , the FO connection of this actuator is no longer available. As a consequence, communication with the

subsequent actuators is lost. To prevent this, the FO connection used in the can also be externally supplied with 24 V DC.

Case B (option)

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 subsequent actuators is lost. To prevent this, the complete can be externally supplied with 24 V DC.

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Information ● Communication of the following devices is monitored by channel 2. In the event of loss of communication (i.e. no response from the next device), the shows the following indication:Wrn FOC.

● If the actuator is the last device of the line topology, the monitoring function should be deactivated (parameter FO cable monitoring M0709 = Off (final devi-ce).

● Ensure proper termination for RS-485 connection of FO coupler. 3.2 Star topology

Figure 9: Structure for star topology

[2] Channel 2

[3] Any Modbus RTU field device [4] FO coupler at DCS (mandatory)

[5] FO coupler for any Modbus RTU field device Special features of star topology

Failure of an FO cable section or of an actuator's FO connection board has no effect on the operability of the remaining actuators.

Information ● As all AUMA actuators are operated at the end of the FO cable section and controlled via channel 1, the parameter FO cable monitoring M0709 should be set to Off (final device).

● Ensure proper termination for RS-485 connection of FO coupler.

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3.3 Loop topology (two-fibre loop) Figure 10: Structure for loop topology

[2] Channel 2

[3] Integration of any Modbus RTIU device (option) [4] FO coupler at DCS (mandatory)

[5] FO coupler for any Modbus RTU field device Special features of loop topology

● The interruption of an FO cable between two actuators is recognised by the redundancy modules (via parameter FO cable monitoring = On (not final device)). Both display and the bus indicate Wrn FOC. The network is then operated as an optical line and all actuators remain available.

● If one module fails (i.e. when the voltage supply is interrupted), only the actuator connected to this module is disconnected from the loop, the remaining network stays operative as a line. All other actuators remain available.

● The actuators have a redundant FO cable connection with a standard Modbus RTU interface (not redundant).

Cable routing and PLC fault evaluation

● To increase service safety, install cables for go-and-return in the loop on sepa-rate lines.

● To achieve complete monitoring of the redundant optical loop, all FO fault signals (including the fault output of the FO coupler) at the master must be evaluated by the PLC controls.

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4. Corrective action

4.1 LED indications

Figure 11: LEDs on connection board

[1] Channel 1 [2] Channel 2 Function Colour Designation LED

Device ready for operation (power supply available) green

PWR 1

FO collective fault: Will be activated if either LED 5, 6 or LED 8 or 9 are illuminated or if the internal RS-485 connection is defec-tive.

red ERROR

2

Byte with incorrect bit(s) received on RS-485 red STATUS 3 Byte received on RS-485 green RX 4

Optical receiving signal (channel 1) incorrect (no or insufficient RX receive level). Both display and Modbus indicate:Wrn FOC

red Fail

5

Is illuminated with LED 7 (green):

System reserve (channel 1) reached (critical or permissible recei-ve lerecei-vel).

The display shows the following indication:Diagnostic > FO cables

> FOC level channel 1 = Level critical, no Rx or Level critical, Rx

Furthermore, both the AUMATIC display and Modbus indicate:

Wrn FO cable budget

yellow Limit

6

Is illuminated and LED 6 (yellow) is not illuminated: Good RX receive level (channel 1).

Is blinking: Data is being received on RX (channel 1).

> FOC level channel 1 = Level good, no Rx or Level good, Rx

green Link/Act

7

Optical receiving signal (channel 2) incorrect (no or insufficient RX receive level). Both display and Modbus indicate:Wrn FOC

red Fail

8

Is illuminated with LED 10 (green):

System reserve (channel 2) reached (critical or permissible recei-ve lerecei-vel).

> FOC level channel 2 = Level critical, no Rx or Level critical, Rx

Furthermore, both the AUMATIC display and Modbus indicate:

Wrn FO cable budget

yellow Limit

9

Is illuminated and LED 9 (yellow) is not illuminated: Good RX receive level (channel 2).

Is blinking: Data is being received on RX (channel 2).

> FOC level channel 2 = Level good, no Rx or Level good, Rx

green Link/Act

10

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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 http://www.auma.com in German and English (indication of commission number required).

5.1 FO connection board:

ST (BNC connector) or SC (Snap-in connector) FO connection

For line topology: 2 x IN/OUT For star topology: 1 x IN/OUT For loop topology: 2 x IN/OUT Channels (optical)

Maximum 115,2 KBit/s

Automatic recognition of the following baud rates: 9,6KBit/s, 19,2KBit/s, 38,4KBit/s, 57,6KBit/s, 115,2KBit/s Data rate:

Half-duplex Transmission type

RS-485 ↔ Fiber optic cable: < 3 TBit Tx ↔ Rx: 11 TBit

Propagation delay

Multi-mode 62.5 (50)/125 μm Single-mode 9/125 μm Fibre

For multi-mode fibre: 13 dB For single-mode fibre: 17 dB Optical budget

62.5/125 μm glass fibre (multi-mode):

2,500 m (FO cable damping max. 2.0 dB/km, without additional damping) Network range max.

50/125 μm glass fibre (multi-mode):

2,500 m (FO cable damping max. 2.0 dB/km, without additional damping) 9/125 μm glass fibre (single-mode):

15 km (FO cable damping max. 0.4 dB/km, without additional damping)

For multi-mode fibre: 1,300 nm For single-mode fibre: 1,310 nm Wave length

–30 °C to +70 °C Operation temperature

24 V DC/70 mA, internally supplied via power supply unit of the AUMATIC. External voltage supply of the AUMATIC 24 V DC/500 mA possible. Only once the AUMATIC is operated on external voltage supply will the bus remain uninterrupted in case of a loss of supply voltage. Power supply

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2 LEDs for general diagnostics:

● LED PWR (green) = Device ready for operation (power supply available) ● LED ERROR (red) = Fault

2 status LEDs for the RS-485 interface: ● LED RX (green) = Byte received on RS-485

● LED STATUS (red) = Byte with incorrect bit(s) received on RS-485 3 status LEDs for each channel:

● LED FAIL (red) = No or insufficient signal on RX

● LED LIMIT (yellow) = Critical but still permissible receive level

● LED Link/Act (green) = Good RX receive level. Data is received via the RS485 channel Indications (LEDs)

Modbus RTU Suitable bus systems

d-Light RS485 by eks Engel GmbH & Co. KG, www.eks-engel.de Versions: 13-MM-ST, 13-MM-SC, 13-SM-ST, 13-SM-SC

● FO coupler for line or star topology:

- RS485/MOD-1KANAL-MM-ST-AC2 (AUMA Artikel.-Nr.: K007.932) / (EKS article no.: 01000 6421-FV)

- RS485/MOD-1KANAL-MM-SC-AC2 (AUMA Artikel.-Nr.: K007.933) / (EKS article no.: 01000 6423-FV)

- RS485/MOD-1KANAL-SM-ST-AC2 (AUMA Artikel.-Nr.: K007.934) / (EKS article no.: 01000 6431-L-FV) - RS485/MOD-1KANAL-SM-SC-AC2 (AUMA Artikel.-Nr.:

K007.935) / (EKS article no.: 01000 6433-L-FV) ● FO coupler for loop topology:

- RS485/MOD-RING-MM-ST-AC2 (AUMA Artikel.-Nr.: K007.936) / (EKS article no.: 01000 7971-FV) - RS485/MOD-RING-MM-SC-AC2 (AUMA Artikel.-Nr.:

K007.937) / (EKS article no.: 01000 7973-FV) - RS485/MOD-RING-SM-ST-AC2 (AUMA Artikel.-Nr.:

K007.938) / (EKS article no.: 01000 7981-L-FV) - RS485/MOD-RING-SM-SC-AC2 (AUMA Artikel.-Nr.:

K007.939) / (EKS article no.: 01000 7983-L-FV) Required FO modules for the

master

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6. Appendix

6.1 Measuring methods

Figure 12: Damping measurement

6.2 Reference addresses

● Required FO module for the master: eks Engel GmbH & Co. KG

Schützenstr. 2, 57482 Wenden-Hillmicke, Tel.: + 49-2762 - 9313 - 60,

www.eks-engel.de 6.3 Literature

● Christoph P. Wrobel

Optische Übertragungstechnik in der Praxis

Grundlagen, Komponenten, Installation, Anwendungen Hüthig Verlag

ISBN 3-7785-2638-3 Appendix

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AUMA Riester GmbH & Co. KG P.O.Box 1362 D 79373 Muellheim Tel +49 7631 809 - 0 Fax +49 7631 809 - 1250 [email protected] www.auma.com