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Network Topologies

3.1 Linear (bus) Topology

SIMATIC NET PROFIBUS, Optical Link Module

Operating Instructions, 07/2008, A2B00065774O, Edition V1.5

3.1

Linear (bus) Topology

Figure

3-1

Network structure in a linear (bus) optical topology

In a linear or bus structure, the single PROFIBUS OLMs are connected by two-fiber

cables.

At the beginning and at the end of a line, modules with one optical channel are

adequate, in-between modules with two optical channels are necessary.

If single point-to-point connections are required, they can be implemented with

modules with one optical channel each.

The bus topology can be implemented with and without fiber-optic link monitoring.

Fiber-optic link monitoring is recommended in homogeneous OLM networks

(factory default).

Please note that to ensure correct operation, the following conditions must be kept

to when configuring the network:

The parameter MIN TSDR, described in the PROFIBUS standard EN 50170 /2/,

must be set to a value

≥

11 on all DTEs. This is usually the case but should be

checked if permanent communication problems occur.

Choose bus node addresses as low as possible when configuring your network,

to reduce master timeouts that may occur due to disruptions.

You will find information on changing the setting in the documentation supplied by

the manufacturer of your DTE.

Ch 1

Ch 2

S E

OLM/P1

OLM/G1

(-1300)

Ch 1

Ch 2

S E

OLM/P1

OLM/G1

(-1300)

Ch 1

Ch 2

S E

Ch 3

S E

OLM/P1

OLM/G1

(-1300)

Ch 1

Ch 2

S E

Ch 3

S E

OLM/P1

OLM/G1

(-1300)

DTE/

bus segment

DTE/

bus segment

DTE/

bus segment

DTE/

bus segment

FOC

RS-485

Содержание OLM/G11-1300 V4.0

Страница 1: ...tallation and Maintenance 5 Approvals and Marks 6 References 7 Drawings 8 SIMATIC NET PROFIBUS Optical Link Module OLM P11 V4 0 OLM P12 V4 0 OLM P11 V4 0 OLM G12 V4 0 OLM G12 EEC V4 0 OLM G11 1300 V4 0 OLM G12 1300 V4 0 Operating Instructions 07 2008 A2B00065774O Edition V1 5 ...

Страница 2: ...y as well as to avoid property damage The notices referring to your personal safety are highlighted in the manual by a safety alert symbol notices referring to property damage only have no safety alert symbol Depending on the danger level the notices are displayed in descending order as follows Danger indicates that death or severe personal injury will result if proper precautions are not taken Wa...

Страница 3: ...s transported stored set up and installed correctly and operated and maintained as recommended Note If PROFIBUS OLMs are supplied via long 24 V supply lines or over networks measures must be taken to prevent interference by strong electro magnetic pulses on the supply lines These can occur for example due to lightning strikes or when heavy inductive loads are switched The robustness of the PROFIBU...

Страница 4: ...information on commissioning 21 4 2 3 Setting compatibility mode and transmit power 22 5 Installation and Maintenance 27 5 1 Installation 27 5 1 1 Installation instructions 27 5 1 2 Connecting optical cables 30 5 2 Installation of the Modules 31 5 3 Connection of the Electrical RS 485 Bus Cables 33 5 4 Connecting of the Operating Power Supply 35 5 5 Connecting the Signaling Contact Wires 35 5 6 Re...

Страница 5: ...etwork structure in a linear bus optical topology 8 Figure 3 2 Network structure with an optical star topology 10 Figure 3 3 Network structure with a redundant optical ring topology 12 Figure 4 1 View of the OLM module from the top 21 Figure 5 1 Measures to suppress 27 Figure 5 2 Securing shielded cables with cable clamps and cable retainers 28 Figure 5 3 View of the module from below 30 Figure 5 ...

Страница 6: ...SIMATIC NET PROFIBUS Optical Link Module vi Operating Instructions 07 2008 A2B00065774O Edition V1 5 Figure 5 13 LED displays on the front panel 37 ...

Страница 7: ...ctions These operating instructions are valid for the following devices SIMATIC NET OLM P11 V4 0 6GK1 503 2CA00 SIMATIC NET OLM P12 V4 0 6GK1 503 3CA00 SIMATIC NET OLM G11 V4 0 6GK1 503 2CB00 SIMATIC NET OLM G12 V4 0 6GK1 503 3CB00 SIMATIC NET OLM G12 EEC V4 0 6GK1 503 3CD00 SIMATIC NET OLM G11 1300 V4 0 6GK1 503 2CC00 SIMATIC NET OLM G12 1300 V4 0 6GK1 503 3CC00 Convention G 1 1300 G glass fiber ...

Страница 8: ...structions are intended for persons involved in the commissioning of PROFIBUS networks with the link modules of the OLM V4 0 series Standards and approvals The devices of the OLM V4 0 series meet the requirements for the CE mark For detailed information please refer to chapter 6 of these operating instructions The devices of the OLM V4 0 series also meet the requirements for the UL C Tick FM and A...

Страница 9: ...can be integrated in existing PROFIBUS fieldbus networks with the known advantages of optical transmission technology A complete PROFIBUS fieldbus network can also be set up with modules in a linear bus star or ring topology as well as any combination of these topologies To increase the reliability of the fieldbus network in case of failure the redundant ring is supported Figure 2 1 PROFIBUS OLM w...

Страница 10: ...ptic cables 10 125 µm 9 125µm 50 125 µm 62 5 125 µm 80 m 400 m 80 m 400 m 3 km 3 km 3 km 3 km 15 km 10 km 10 km 15 km 10 km 10 km Table 2 1 Number of electrical and optical ports per module usable fiber types as well as maximum achievable fiber optic cable distances between the modules See the Technical Data for precise conditions of use PCF stands for Polymer Cladded Fiber and is similar to HCS 2...

Страница 11: ...sion technology for PROFIBUS published by the PROFIBUS User Organization PNO OLM G12 and OLM G12 EEC have the same functions They only differ in the specification of the ambient climatic conditions the OLM G12 is suitable for use in the standard temperature range from 0 C to 60 C whereas the OLM G12 EEC extended environmental conditions can be used in the extended temperature range of 25 C to 60 C...

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Страница 13: ...nfiguration for example to allow continued communication if a cable is broken Please note the following Single DTEs or complete PROFIBUS segments with a maximum of 31 nodes can be connected to the electrical interface of the PROFIBUS OLM Use only fiber optic cables in areas subject to heavy noise to avoid EMC problems affecting the entire network Only OLMs of the same wavelength may be connected t...

Страница 14: ...ptic link monitoring is recommended in homogeneous OLM networks factory default Please note that to ensure correct operation the following conditions must be kept to when configuring the network The parameter MIN TSDR described in the PROFIBUS standard EN 50170 2 must be set to a value 11 on all DTEs This is usually the case but should be checked if permanent communication problems occur Choose bu...

Страница 15: ...k The segmentation is canceled automatically as soon as both modules recognize that the segmented fieldbus sub network is no longer disrupted based on test frames that they send out automatically Note that if a problem occurs in networks with several active bus nodes two logical token rings are formed As a result temporary network disturbances may occur due to double tokens or frame collisions whe...

Страница 16: ...tar Make sure that the electrical star segment is carefully wired Keep its span as small as possible to avoid interference in the electrical star segment that can spread to the whole network You can achieve this by positioning the OLMs directly next to each other on a DIN rail Switch on the terminating resistors see section 5 3 in the bus connectors at the two ends of the electrical star segments ...

Страница 17: ... monitored by the connected OLMs Note Unused optical channels you intend to use later to expand the network cause a broken fiber optic cable signal if the monitoring is active You can avoid this error message by setting unused channels to the mode bus without fiber optic link monitoring Remember that the optical channels that are not connected must be protected against external light and pollution...

Страница 18: ... and the ring becomes an optical bus If one module fails only the DTEs connected to this module or the RS 485 segment are disconnected from the ring The rest of the network itself stays functional as a bus The problem is indicated by the LEDs of the two OLMs connected to the disrupted fiber optic link and by the signaling contacts of these OLMs The segmentation is canceled automatically as soon as...

Страница 19: ... the network at this time This status occurs when the master sends a GAP query to an address lower than HSA The master tries to address the device cyclically and waits for a reply at the longest until the configured slot time has elapsed GAP query The OLM recognizes this status and closes the optical bus to form an optical ring in the middle of this query sequence This results in the following two...

Страница 20: ...re than two OLMs echo frames and forwarded frames will alternate quickly Due to the extended display time of at least 300 ms all channel LEDs seem to be lit yellow continuously The channel LEDs may react differently in the redundant optical ring only if the following conditions are met 1 The redundant optical ring consists of exactly two OLMs and the two fiber optic links are of different length d...

Страница 21: ... yellow CH2 LED lit red CH2 LED lit yellow CH3 LED lit yellow CH3 LED lit red 3 Fault FOC2 interrupted OLM 1 OLM 2 SystemLED lit green SystemLED lit green CH1 LED lit yellow CH1 LED lit yellow CH2 LED lit yellow CH2 LED lit red CH3 LED lit red CH3 LED lit yellow Configuration 2 see Figure 3 1 Configuration 2 FOC1 FOC2 LED display 1 Situation no FOC interruption OLM 1 OLM 2 SystemLED lit green Syst...

Страница 22: ...e or the other optical channel receives a frame first Due to the extended display time of at least 300 ms all channel LEDs are then lit yellow continuously Configuration 1 2 FOC1 FOC2 LED display A 1 Situation no FOC interruption OLM 1 OLM 2 SystemLED lit green SystemLED lit green CH1 LED lit yellow CH1 LED lit yellow continuous flashing flickering continuous flashing flickering CH2 LED lit yellow...

Страница 23: ... contact opens in case of error Voltage CE max 50 V DC 30 V AC safety extra low voltage cULus max 30 V DC 30 V AC safety extra low voltage Current max 1 0 A Signal transmission Transmission rate 9 6 19 2 45 45 93 75 187 5 500 Kbps 1 5 3 6 12 Mbps Transmission rate setting automatic Bit error rate 10 9 Signal delay time any input output 6 5 tBit Retimer Input all channels Signal distortion Bit leng...

Страница 24: ...default 9 5 dBm 5 dBm Sensitivity of receiver 25 dBm 28 dBm 29 dBm Overdrive limit receiver 3 dBm 3 dBm 3 dBm Range 3 with glass fiber E 10 125 0 5dB km 0 15 km with glass fiber G 50 125 3dB km 860nm 1dB km 1310nm 0 3 km 0 10 km with glass fiber G 62 5 125 3 5dB km 860nm 1dB km 1310nm 0 3 km 0 10 km with PCF S 200 230 Transmit power reduced Transmit power default 0 400 m with plastic fiber S 980 1...

Страница 25: ... OLMG1x EEC 95 non condensing for all other OLMs Mechanical ambient conditions Oscillation in operation 10 58 Hz 0 075 mm deflection 58 150 Hz 1 g acceleration Oscillation during transportation 5 Hz 9 Hz 3 5 mm deflection 9 Hz 500 Hz 1 g acceleration Vibration in operation 40 m s Shock in operation 150 m s 10 ms Shock packed 250 m s 6 ms Free fall unpacked 10 cm Free fall packed 30 cm in product p...

Страница 26: ...easures must be taken to avoid the rated voltage of the equipment being exceeded by more than 40 by transient overvoltages This is the case if the equipment is supplied exclusively by SELV circuits Only the connectors supplied may be used for the electrical connection of the OLM applies also when replacement parts are used When using the existing connectors e g OLM V3 the proper contact cannot be ...

Страница 27: ...dules then involves the following steps Checking and if necessary setting of the DIL switches Installation of the modules Connection of the power supply and if required connection of the signaling contacts Connection of the RS 485 bus line with installed bus connectors if you use a bus topology remember that the terminating resistors in the connectors at both ends of the line must be activated Con...

Страница 28: ...in position 0 Compatibility with SINEC L2FO OLM P3 P4 S3 S4 S3 1300 S4 1300 disabled DIL switch S7 compatibility in position 1 Compatibility with SINEC L2FO OLM P3 P4 S3 S4 S3 1300 S4 1300 enabled By setting DIL switch S7 to 1 the functionality compatibility with optical link modules SINEC L2FO OLM P3 OLM P4 OLM S3 OLM S4 OLM S3 1300 and OLM S4 1300 is enabled This mode is necessary for mixed oper...

Страница 29: ...e ring Line On Off 0 1 Line Ring Line On Off S0 Reserved S0 Reserved S8 Reserved S8 Reserved OLM P3 S6 reserved OLM S3 OLM S3 1300 S2 reserved Table 4 2 DIL switches in compatibility mode 4 2 3 2 Setting the mode Notice The following information is only valid for the default setting of S7 S7 0 this means compatibility is disabled The mode of the electrical channel CH1 is set with DIL switch S0 The...

Страница 30: ...gmentation CH2 is set to this mode when S1 and S2 are in position 0 CH3 is set to this mode when S3 and S4 are in position 0 Mode bus without fiber optic link monitoring CH2 is set to this mode when S1 is in position 1 and S2 is in position 0 CH3 is set to this mode when S3 is in position 1 and S4 is in position 0 Mode redundant optical ring CH2 is set to this mode when S1 and S2 are in position 1...

Страница 31: ...interconnected by fiber optic cables with a minimum length of 30 m As an alternative a fixed attenuator with an attenuation value between 5 dB and 15 dB can be used The fixed attenuator must be installed into the OLM receiver line If PCF fibers S 200 230 are used neither a minimum line length nor an attenuator is necessary 4 2 3 6 DIL Switches S5 S6 in OLM V4 G11 G12 G11 1300 G12 1300 In OLM V4 de...

Страница 32: ......

Страница 33: ...mpatibility Electromagnetic compatibility involves all questions regarding electric magnetic and electromagnetic emission effects To avoid disturbing influences on electrical installations these effects must be reduced to a minimum The construction of device correct connection of bus lines and the suppression of self inductances are essential limitation measures See also the note in section 4 2 1 ...

Страница 34: ...t by connecting the shield of the bus cables at both ends CE mark Secure the shield of the bus cable to the connector housing or the cable clamps In stationary use it is advisable to strip the insulation of the shielded cable over the entire length damaging it and to lay it on shielding grounding rail Note If there are potential differences between the grounding points an unduly high compensating ...

Страница 35: ... temperature and high humidity The deterioration caused by humidity especially applies to plastic fiber optic cables The described deterioration of devices and fiber optic cables is offset by the link power margin This is obtained from the difference between the receiver sensitivity and the minimum input optical power see section 4 1 along with the cable attenuation that derives from the maximum o...

Страница 36: ...nected crossover connection The BFOC sockets of a channel that belong together are marked on the lower part of the front panel that the optical connector is securely locked to the BFOC socket bayonet connector must be locked that the tip of the BFOC connector is inserted completely into the fiber optic cable socket when using single mode fiber optic cables If necessary push the connector into the ...

Страница 37: ...ons can be met Make sure there is enough space to connect the bus and voltage supply lines Connect the fiber optic cables before you install the modules This makes it easier to connect the fiber optic cables Only install the modules on a rail or a mounting plate that is grounded with low resistance and inductance No other grounding measures are necessary Figure 5 4 Installation of a module on a st...

Страница 38: ...ht side of the OLM the side with the type label Fix with this screws the mounting plate MLFB 6GK1503 8AA00 Now fix the OLM at the wall or at a cubicle plate Make sure there is a reliable and permanent electrical connection between the mounting plate and surface for example by using toothed washers mounting plate with OLM on the front holes for wall plate installation Figure 5 5 Installation of a m...

Страница 39: ... pull up pull down resistances is available at pin 6 The resistances must have a power loss of at least 0 25 W The RS 485 bus cables RxD TxD N and RxD TxD P are galvanically isolated from the 24 V supply voltage within the SELV limits functional isolation The RS 485 interface is electrically connected with the housing 71 10 15 37 35 0 60 15 108 0 21 7 67 8 83 3 3x Ø3 5 Figure 5 6 Drilling measures...

Страница 40: ... OLM when the network is active 1 Plug the RS 485 bus connector onto the relevant device e g the programming device and secure it with the screws 2 Insert the RS 485 bus connector in the PROFIBUS OLM with a sharp movement and without tilting the connector Carry out the steps in the reverse order to disconnect a device from the network Make sure that the bus segment connected to the RS 485 port is ...

Страница 41: ...device and avoid polarity reversal 5 5 Connecting the Signaling Contact Wires Figure 5 9 Signaling contact relay with floating contacts In case of error the contact is open Figure 5 10 Signaling contact pin assignment 5 pin terminal block The terminal block can be removed from the device to allow wiring to be connected A relay with floating contacts is available for the signaling contact on the 5 ...

Страница 42: ...ent sockets data transmission is not influenced The receive level of the two optical channels can be read in on a PLC using floating high impedance analog inputs This allows the incoming optical power to be documented e g for later measurement aging damage a good bad test to be carried out limit value The measurement must be performed with a high resistance ungrounded voltmeter The ground connecto...

Страница 43: ...s a substitute for a calibrated level measuring device with a calibrated light source The value obtained only serves to classify the received optical signals in 3 classes good normal operation green 5V U 240 mV critical optical link margin reduced yellow 120 mV U 240 mV bad functionality not guaranteed red U 120 mV The measurement must be performed with a standard ungrounded and high resistance vo...

Страница 44: ...cal ring mode but the second one is not this mode must always be set on both optical channels The value for the slot time of the network is set too low does not signal does not signal lit yellow Signals are received on the RS 485 bus lines does not signal CH1 electrical not lit Bus node is not connected does not signal Connected bus node is not turned on Interruption of one or both cores of the RS...

Страница 45: ...r module longer than permitted Loose contact at a fiber optic cable connector Fiber in the fiber optic cable is loose When the channel LED of the two concerned OLMs continues to be lit red after clearing a fiber optic cable fault in the redundant optical ring check that the setting of the parameter HSA described in section 3 3 is correct signals flashes red yellow Periodically occurring error see ...

Страница 46: ...n 5 1 2 were met when connecting and laying the optical bus cables 2 Detect the optical receive level section 5 6 Check the fiber optic cable attenuation with an optical level meter if the level is in the range function not guaranteed or optical link power margin reduced If the attenuation is too high replace the fiber optic cable If the attenuation is within the valid range one of the two OLMs of...

Страница 47: ...ding level LED is green 5 8 Maintenance The OLMs V4 0 are maintenance free It is also not possible to make any calibrations on the OLM V4 0 There are no elements whatsoever inside the OLM V4 0 housing that need to be touched by engineers or users The only controls are the DIL switches are accessible from the outside The devices have a resettable fuse PTC If the fuse trips all LEDs go off despite c...

Страница 48: ...on profile If the limit is exceeded due to the extra delays caused by OLMs and fiber optic cables a warning message is displayed and the parameters are adapted 5 10 2 Configuring redundant optical rings The following configuration requirements must be met in the redundant optical ring see section 3 3 for details One unused address lower than the HSA 1 Increase of the retry value to at least 3 2 Ch...

Страница 49: ...or calculating the slot time for DP FMS universal and DP with S5 95U redundant optical ring The slot time calculation only takes into account the optical network and the connection of bus nodes to the OLM via a RS 485 bus segment each with a maximum length of 20 m Longer RS 485 bus segments are included in the calculation by adding them to the length of the fiber optic cables Note If the value of ...

Страница 50: ......

Страница 51: ...G11 1300 V4 0 6GK1 503 2CC00 SIMATIC NET OLM G12 1300 V4 0 6GK1 503 3CC00 EMC directive The SIMATIC NET products above meet the requirements for the following EC directives Directive 89 336 EEC Electromagnetic compatibility Area of Application The products are designed for use in an industrial environment Area of Application Requirements emission immunity Industrial area EN 61000 6 4 2001 replaces...

Страница 52: ...munikation A D SC IC Postfach 4848 D 90327 Nürnberg Germany Notes for the manufacturers of machines The products are not machines in the sense of the EC Machinery Directive There is therefore no declaration of conformity relating to the EC Machinery Directive 89 392 EEC for these products If the products are part of the equipment of a machine they must be included in the procedure for the declarat...

Страница 53: ...05 EN 60079 0 2006 6 5 UL approval U S and Canada c UL us LISTED IND CONT EQ 91MA I T E for HAZ LOC 34SM CLASS 1 DIV 2 GROUP A B C D T4 CLASS 1 Zone2 GP IIC T4 CLASS 1 Zone2 Aex nC IIC T4 WARNING Exposure to some chemicals may degrade the sealing properties of materials used in the following devices Relay K600 materials used Manufacturer 1 Song Chuan base PA66 dust cover PBT sealing compound Eccob...

Страница 54: ...Instructions 07 2008 A2B00065774O Edition V1 5 6 6 Shipbuilding approvals The devices of the OLM V4 0 series also meet several requirements for shipbuilding For the respectively valid approvals call our hotline 49 18050500222 Furthermore you can gather information at http support automation siemens com ...

Страница 55: ...bers 6GK1970 5CA20 0AA0 German 6GK1970 5CA20 0AA1 English 6GK1970 5CA20 0AA2 French 6GK1970 5CA20 0AA4 Italian 2 EN 50170 1 2 1996 General Purpose Field Communication System Volume 2 Physical Layer Specification and Service Definition 3 DIN 19245 Measurement and Control PROFIBUS Part 3 Process Field Bus Decentralized Peripherals DP 4 EIA Standard RS 485 April 1983 Standard for electrical character...

Страница 56: ......

Страница 57: ...SIMATIC NET PROFIBUS Optical Link Module Operating Instructions 07 2008 A2B00065774O Edition V1 5 51 8 Drawings 8 ...

Страница 58: ......

Страница 59: ...tromagnetic Compatibility HCS Hard Polymer Cladded Silica Fiber registered trademark of Ensign Bickford HSA Highest Station Address IEC International Electrotechnical Commission LED Light Emitting Diode OBT Optical Bus Terminal OLM Optical Link Module PCF Polymer Cladded Fiber similar to HCS PNO PROFIBUS User Organization SELV Safety Extra Low Voltage TSDR MIN Time Station Delay Remote Minimum UL ...

Страница 60: ......

Страница 61: ...magnetic compatibility 27 F FM approval 47 Fuse 41 I Installation options 31 L Link power margin 29 M Mode 22 N Network topology bus linear topology 7 point to point connection 7 redundant optical ring 7 ring topology 12 star topology 7 10 O Optical link power budget 29 Optical star topology 3 R Redundant ring 12 S Segment monitoring 23 Shielded cables 28 SINEC L2FO 22 U UL approval 47 ...

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