Siemens OSM, ESM technical specifications Latency, Link Control, TP Port

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Glossary

Latency

The latency specifies the taken for packets to pass through the

 

OSM/ESM. It is assumed that a received packet can be sent on

 

immediately. The latency does not include the time necessary for the

 

OSM/ESM to receive a packet.

Link Control

OSMs/ESMs monitor the connected TP/ITP cable segments for short-

 

circuits or wire breaks using regular link test pulses complying with the

 

100BASE-TX standard. OSMs/ESMs do not send data to a segment

 

from which they are not receiving link test pulses. An unused interface

 

is taken to be a wire break since the device without power cannot send

 

link test pulses.

MDI-X

Medium Dependent Interface Crossover

 

RJ-45 jack with pinning of a network component

OSM

Optical Switching Module. SIMATIC NET Ethernet switch with optical

 

and electrical ports

Reconfiguration Time Time required by the OSM/ESM operating in the redundancy manager (RM) or standby mode to reestablish a functioning configuration if a device fails or the cable is interrupted.

Redundancy Manager Mode of an OSM or ESM for forming a redundant ring structure. The

(RM)RM monitors the OSM or ESM bus connected to it, closes the bus if it detects and interruption. This reestablishes a functioning bus configuration.

One and only one device can operate in the RM mode in every OSM or

ESM ring.

Signaling Contact Floating relay contact via which the error states detected by the OSM/ESM can be signaled.

Standby-sync port Port of an OSM/ESM via which two OSMs or ESMs are interconnected in a redundant ring link allowing them to inform each other of their operating states (not available with the OSM TP22 and ESM TP40).

Store and forward In this switching method used on the OSM/ESM, the complete packet is read in before it is passed on by the switch. A packet is only passed on if it is error-free.

TP Port

Port with a TP connector (RJ-45 jack)

Industrial Ethernet OSM/ESM

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C79000-Z8976-C068-10

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Contents Simatic NET Copyright Siemens AG 2000/02, All rights reserved Classification of Safety-Related NoticesTrademarks Safety Instructions Regarding your ProductQualified Personnel Correct Usage of Hardware ProductsPrior to Startup Correct Usage of Software ProductsPreface Installing an OSM/ESMPurpose of the Operating Instructions PackageValidity of the Operating Instructions Further DocumentationFinding Information Audience Guide to the ManualPersonnel Qualification Requirements Standards and ApprovalsContents Introduction Introduction Overview of the Variants of the OSM/ESM OSM ITP62Possible Attachments Properties of the OSM ITP62 OSM ITP62-LD OSM ITP62-LDITP62-LD Properties of the OSM ITP62-LDOSM ITP53 OSM ITP53Properties of the OSM ITP53 ESM ITP80 ESM ITP80Properties of the ESM ITP80 OSM TP62 OSM TP62Properties of the OSM TP62 ESM TP80 ESM TP80Properties of the ESM TP80 OSM BC08 OSM BC08Properties of the OSM BC08 OSM TP22 OSM TP22Properties of the OSM TP22 ESM TP40 ESM TP40Properties of the ESM TP40 Limitation of Errors to the Network Segment Affected Simple Network Configuration and Network ExpansionFunctions Increased Network PerformanceSetting the Transmission Rate, Autonegotiation Deleting AddressesPackets with the Vlan Priority Tag Functions Network Topologies with OSM/ESM Bus with OSM Bus StructureBus with ESMs Redundant Ring Structure with OSMs Redundant Ring StructureESM in RM mode Redundant Coupling of Network Segments OSM/ESM Port Assignment in the Standby Mode Simultaneous Standby and Redundancy Manager OperationReplacing the Standby Master During Operation OSM RM mode Compatibility Compatibility of OSM Version 2/ESM with OSM/ORM VersionRing with OSM Version 2 as Redundancy Manager Redundant Coupling of Rings Standby Master Slave OSM Coupling Network Segments OSM RM modeInterfaces, Displays and Operator Controls ITP/TP Ports ITP PortsTP Ports Properties of the TP/ITP Ports Autonegotiation ModeLink Control Auto Polarity ExchangeInterfaces, Displays and Operator Controls FO Ports Standby-Sync Port Pinout Serial InterfaceTerminal Block for the Power Supply and Signaling Contact Power Supply Signaling ContactRM Mode additional OSM/ESM in the Standby Mode Input voltage must not exceed +30V DC or fall below -30V DC Digital InputsDisplays and Operator Controls Fault red LEDLED Display Status Stby Standby green LEDRM Redundancy Manager green LED Display mode Meaning LED PowerFault Mask Display Port LEDsFull duplex Port LED DIP Switches Two-Pin DIP SwitchSelect/Set Button Installation, Commissioning, Cleaning Maintenance Unpacking, Checking the Consignment Do not install damaged componentsPreparations InstallationStandard Rail Mounting Installing the OSM on a DIN Standard RailRemoving from the Standard Rail Removing from a Standard RailInstallation on the S7-300 Rail Installation on a Simatic S7-300 RailInstallation in the 19 Cubicle Installation in Pairs in the 19 CubicleWall Mounting Wall MountingWall Mounting Cleaning Maintenance Specifying the keyword OSM Firmware Firmware UpdateFirmware Update Firmware Update Firmware Update Firmware Update Ports Technical SpecificationsTechnical Specifications Switching Properties of OSM/ESM Permitted Cable LengthsCascading Depth Permitted Ambient Conditions/EMC Only horizontal installationMechanical Design PermittedConsignment / Order Numbers Accessories Standards and Approvals Product nameCE Mark Approval for Australia Area of ApplicationUL Approval CSA Certification FM Approval Adherence to Installation Instructions Glossary Fault Mask Filtering ITP PortLatency Link ControlTP Port Industrial Ethernet OSM/ESM C79000-Z8976-C068-10 Http//www4.ad.siemens.de/view/cs/de/8677203 ReferencesIndustrial Ethernet OSM/ESM C79000-Z8976-C068-10 Ambient conditions, permitted IndexIndex