Siemens SIMATIC NET PROFIBUS Instrucciones de operaciones Pagina 48
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Installation and Maintenance
5.7 LED Displays and Troubleshooting
SIMATIC NET PROFIBUS Optical Link Module OLM V4.0
42 Operating Instructions, 01/2013, C79000-G8976-C270-03
LED display Possible causes Signaling
contact
not lit Transmission rate not detected yet – LED “System“ flashes red
- There is no transmitting bus node
- Transmit and receive fiber-optic cables swapped over
-No partner module connected or partner module is not turned on
- Connected partner module is defective
Transmission rate is detected – LED “System” is lit green
- When the mode “redundant optical ring“ is set, the
optical channel operates as standby channel. There is no problem in the OLM
or on the fiber-optic cable.
- If one of the modes “bus with fiber-optic link monitoring...“
is set, no frames are received on the optical
PROFIBUS channel. There is no error in the OLM or on the
fiber-optic cable.
does not signal
flashes yellow Transmission rate is detected – LED “System” is lit green or flashes red/green
- There is no transmitting bus node (fiber-optic cable connection is ok)
does not signal
lit red - Transmit and receive fiber-optic cables are swapped over
- No partner module connected or partner module is not turned on
- Connected partner module is defective
- Transmission time exceeded by the connected partner module
- Interruption of a fiber-optic cable
- Fiber optic cable to the partner 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 pa
rameter HSA described in section 3.3 is correct
signals
flashes
red/yellow
- Periodically occurring er
ror (see above) loose contact at a fiber-optic cable
connector
- Fiber in the fiber-optic cable is loose
- Only one single bus node is connected, which only sends token to itself.
After the activation of a second participant the LED display should stop
signals
flashes red/yellow/off
A periodically alternating color (red-yellow-off) of the port LED in combination
with a green port level LED signalizes an optical overdrive of the corresponding
channel. For a possible fix of the problem it could be helpful to reduce the
transmit power (refer to section 4.2.3.6 for detail).
signals
Mo
de “bus without fiber-optic link monitoring”
lit yellow PROFIBUS frames are received on the optical channel does not signal
Not lit - There is no transmitting bus node
- Transmit and receive fiber-optic cables are swapped over
- No partner module connected or partner module is not active
- Connected partner module is defective
does not signal
Lit green Receiving level adequate, normal operation
lit yellow Receiving level critical, link power margin reduced not relevant
CH2, CH3
Level
Lit red Receiving level inadequate, function not guaranteed
Table 5-1 Meaning of the LED displays and indication by the signaling contact
- C79000-G8976-C270-03 1
- Contents 4
- Contents 5
- 1 Preface 7
- Further documentation 8
- Finding information 8
- Audience 8
- Standards and approvals 8
- 2 Introduction 9
- Introduction 10
- 2.1 Introduction 10
- Introduction 11
- 2.1 Introduction 11
- 3 Network Topologies 13
- 3.1 Linear (bus) Topology 14
- Network Topologies 15
- 3.1 Linear (bus) Topology 15
- 3.2 Star Topology 16
- 3.3 Ring Topology 17
- Network Topologies 18
- 3.3 Ring Topology 18
- 3.3 Ring Topology 19
- 4 Product Characteristics 23
- Product Characteristics 24
- 4.1 Technical Specifications 24
- Product Characteristics 25
- 4.2 Installation 27
- 4.2 Installation 28
- 4.2 Installation 29
- 4.2.3.2 Setting the mode 30
- 5.1 Installation 35
- 5.1 Installation 36
- 5.1 Installation 37
- Locking slide 40
- OLM on the front 41
- Measured voltage / V 45
- 5.7.1 LED displays 46
- 5.7.2 Troubleshooting 49
- 5.8 Maintenance 50
- 5.9 Cleaning 51
- 5.10 Configuration 51
- 5.10 Configuration 52
- 6 Approvals and Marks 53
- 6.2 c-tick 54
- 6.3 KC (Korean Standard) 54
- 6.4 FM approval 55
- 6.5 Ex approval 55
- 6.7 Shipbuilding approvals 56
- 7 References 57
- 8 Drawings 59
- Drawings 60
- Glossary 61
- Index 64
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