hopf Elektronik GmbH 8030HEPTA/NCD Technical Manual

_____________________________________________________________

Technical Manual

Network Clock Device

Model 8030HEPTA/NCD

ENGLISH

Version: 04.00 - 21.06.2018

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SET

IMAGE (8030)

FIRMWARE

Valid for

Version: 04.xx

Version: 04.xx

Version: 02.xx

Industriefunkuhren

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hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

INPORTANT NOTES

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hopf

Elektronik GmbH

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Version number (Firmware / Manual)

THE FIRST TWO DIGITS OF THE VERSION NUMBER OF THE TECHNICAL MANUAL AND

THE FIRST TWO DIGITS OF THE FIRMWARE VERSION MUST COMPLY WITH EACH OTHER.

THEY INDICATE THE FUNCTIONAL CORRELATION BETWEEN DEVICE AND TECHNICAL

MANUAL.

THE DIGITS AFTER THE POINT IN THE VERSION NUMBER INDICATE CORRECTIONS IN THE

FIRMWARE / MANUAL THAT ARE OF NO SIGNIFICANCE FOR THE FUNCTION.

Downloading Technical Manuals

All current manuals of our products are available free of charge via our homepage on the
Internet.

Homepage: http://www.hopf.com
E-mail: [e-mail]

Symbols and Characters

Operational Reliability

Disregard may cause damages to persons or material.

Functionality

Disregard may impact function of system/device.

Information

Notes and Information.

INPORTANT NOTES

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hopf

Elektronik GmbH

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Safety regulations

The safety regulations and observance of the technical data serve to en­sure trouble-free operation of the device and protection of persons and
material. It is therefore of utmost importance to observe and compliance
with these regulations.

If these are not complied with, then no claims may be made under the
terms of the warranty. No liability will be assumed for any ensuing dam­age.

Safety of the device

This device has been manufactured in accordance with the latest techno­logical standards and approved safety regulations

The device should only be put into operation by trained and qualified staff.
Care must be taken that all cable connections are laid and fixed in position
correctly. The device should only be operated with the voltage supply in­dicated on the identification label.

The device should only be operated by qualified staff or employees who
have received specific instruction.

If a device must be opened for repair, this should only be carried out by
employees with appropriate qualifications or by

hopf

Elektronik GmbH.

Before a device is opened or a fuse is changed all power supplies must
be disconnected.

If there are reasons to believe that the operational safety can no longer
be guaranteed the device must be taken out of service and labelled ac­cordingly.

The safety may be impaired when the device does not operate properly
or if it is obviously damaged.

CE-Conformity

This device fulfils the requirements of the EU directive 2014/30/EU "Electro­magnetic Compatibility" and 2014/35/EU "Low Voltage Equipment".

Therefore the device bears the CE identification marking
(CE = Communautés Européennes = European communities)

The CE indicates to the controlling bodies that the product complies with the requirements of
the EU directive - especially with regard to protection of health and safety for the operator and
the user - and may be released for sale within the common markets.

TABLE OF CONTENTS

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Contents Page

1 Network Clock Device 8030HEPTA/NCD ..................................................................... 7

2 System Structure ........................................................................................................ 10

2.1 19 inch Rack 1U/84HP (Slim Line) .......................................................................... 11

2.2 Functional Overview of the Front Panel Elements ................................................... 11

2.2.1 LCD-Display with Pushbutton ............................................................................................ 11

2.2.2 Status-LEDs – System (& Extension) ................................................................................ 12

2.2.3 Functional Elements Rear Side ......................................................................................... 13

2.2.4 Extension Modules 1 - 6 (Option) ...................................................................................... 13

3 Function Principle ....................................................................................................... 14

3.1 Block Diagram ......................................................................................................... 14

3.2 Function 8030NTC .................................................................................................. 15

3.3 Function 8030NTS/M ............................................................................................... 15

3.4 LCD-Display with Pushbutton .................................................................................. 15

3.5 System EXTENSION 1 - 8 (Option) ......................................................................... 16

4 System Behaviour ....................................................................................................... 17

4.1 Boot Phase .............................................................................................................. 17

4.2 Adjustment Process ................................................................................................. 17

4.3 Firmware-Update ..................................................................................................... 17

4.4 Activation of Functions (Activation Key) ................................................................... 17

5 Installation ................................................................................................................... 18

5.1 Network Clock Device 8030HEPTA/NCD in 1U Housing ......................................... 18

5.1.1 Installation of the 19 Inch Rack .......................................................................................... 18

5.1.2 Earthing .............................................................................................................................. 18

5.1.3 AC Power Supply ............................................................................................................... 18

5.1.3.1 Safety and Warning Instructions ................................................................................................. 19

5.1.3.2 Power Supply Unit Specifications ............................................................................................... 19

5.1.3.3 Fusing ......................................................................................................................................... 19

5.1.4 DC Power Supply (Option) ................................................................................................. 20

5.1.4.1 Power Supply Unit Specifications ............................................................................................... 20

5.1.4.2 Fusing ......................................................................................................................................... 20

5.1.4.3 Reverse Voltage Protection ........................................................................................................ 20

5.2 Connection LAN Interface ETH0/ETH1.................................................................... 21

6 Commissioning ........................................................................................................... 22

6.1 Switching the Operating Voltage on ......................................................................... 22

6.2 LCD-Display after Switch On / Reset (Boot Phase) ................................................. 22

6.3 Establish the Network Connection via Web Browser ............................................... 23

6.4 Network Configuration for ETH0 via LAN through

hmc

software ............................ 23

7 LCD-Display with Pushbutton – Function ................................................................. 26

TABLE OF CONTENTS

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7.1 Pushbutton Function (Light / Scroll) ......................................................................... 26

7.2 Standard Display Image .......................................................................................... 26

7.2.1 Standard Display Image without valid Time ....................................................................... 26

7.2.2 Standard Display Image with valid Time ............................................................................ 27

7.2.3 Standard Display with Additional Information .................................................................... 28

7.3 GENERAL ERROR ................................................................................................ . 28

7.4 LAN Parameter ........................................................................................................ 29

7.5 Local Time Parameter ............................................................................................. 30

7.6 Announcements (Summertime / Leap Second) ....................................................... 30

7.7 System-Info ............................................................................................................. 31

8 HTTP/HTTPS WebGUI – Web Browser Configuration Interface ............................... 31

9 SSH and Telnet Basic Configuration ......................................................................... 32

10 Fault Analysis / Troubleshooting ............................................................................... 33

10.1 Error Patterns .......................................................................................................... 33

10.1.1 Complete Failure ................................................................................................................ 33

10.2 Support by Company

hopf

..................................................................................... 33

11 Maintenance ................................................................................................................ 34

11.1 General Guidelines for Cleaning .............................................................................. 34

11.2 Cleaning the Housing .............................................................................................. 34

11.3 Cleaning the Display and Front Panel...................................................................... 34

12 Technical Data ............................................................................................................ 35

12.1 General – 8030HEPTA/NCD ................................................................................... 35

13 Factory Defaults of Time Server 8030HEPTA/NCD ................................................... 37

14 Glossary and Abbreviations ...................................................................................... 37

14.1 NTP-specific Terminology........................................................................................ 37

14.2 Abbreviations ........................................................................................................... 38

14.3 Definitions ............................................................................................................... 39

14.3.1 DHCP (Dynamic Host Configuration Protocol) .................................................................. 39

14.3.2 NTP (Network Time Protocol) ............................................................................................ 39

14.3.3 SNMP (Simple Network Management Protocol) ................................................................ 40

14.3.4 TCP/IP (Transmission Control Protocol / Internet Protocol) .............................................. 40

14.3.5 PTP (Precision Time Protocol) ........................................................................................... 40

14.4 Accuracy & NTP Basic Principles ............................................................................ 41

15 List of RFCs ................................................................................................................. 43

16 List of Open Source Packages Used ......................................................................... 43

NETWORK CLOCK DEVICE 8030HEPTA/NCD

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Elektronik GmbH

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1 Network Clock Device 8030HEPTA/NCD

The Network Clock Device 8030HEPTA/NCD consists of a Network Time Client 8030NTC and
a Network Time Server 8030NTS/M. Module 8030NTC acts as time source for the application,
module 8030NTS/M as NTP Stratum 1 Server or as PTP Grandmaster.

Module 8030NTC supports the following network protocols as synchronization source:

• NTP (incl. SNTP)

• IEEE 1588 Precision Time Protocol (PTP) (Activation Key required)

Module 8030NTS/M can output the following network protocols:

• NTP (incl. SNTP)

• Daytime

• Time

• SINEC H1 time datagram (Activation Key necessary)

• IEEE 1588 Precision Time Protocol (PTP) (Activation Key necessary)

Front Side

Rear Side

The Network Clock Device 8030HEPTA/NCD is integrated into a 1U/84HP 19" rack and char­acterized by its easy and simple operation. Some of these practice-oriented functionalities are
e.g.:

• Complete parameterisation via protected WebGUI access
All required settings for operation can be executed via a password protected WebGUI.

• LCD-Display and Status-LEDs in the front panel
The LCD-Display and the Status-LEDs make rapidly and easily substantial information

for commissioning, on the operating status and for support matters available if a prob­lem occurs, even without WebGUI access.

• Automatic switch-over of summer/winter time (initial setting required)
After initial commissioning there is no user intervention for a correct summer/winter

time changeover for the following years required.

• Automatic handling of the leap second
In case of announcing a leap second via the sync source of Network Clock Device

8030NTS/NCD, this leap second will automatically be inserted.

• Customized extensions possible
The new designed housing concept allows customized system extensions for addi-

tional signal outputs (processed ex-works) easily and fast.

NETWORK CLOCK DEVICE 8030HEPTA/NCD

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A superior security is guaranteed via available coding procedures such as symmetric keys,
autokey and access restrictions and deactivation of non-used protocols.

Different Management and Monitoring Functions are available as options (e.g. SNMP,
SNMP-Traps, E-mail notification, Syslog-messages including MIB II and private Enterprise
MIB).

A few other basic functions of the Network Clock Device 8030HEPTA/NCD:

• Operates as NTP Server with Stratum 1 or as PTP Grandmaster

• Easy operation via WebGUI

• LCD-Display (2x40) and Status LEDs on the front panel

• Completely maintenance-free system

• Maintenance-free, buffered backup clock for at least three days

Software supplied:

•

hmc (hopf

Management Console) Software

Overview of the functions of the Network Clock Device 8030HEPTA/NCD:

Two Ethernet Interfaces

• Auto negotiate

• 10 Mbps half-/full duplex

• 100 Mbps half-/full duplex

• 1 Gbps full duplex

Time Protocols

• RFC-5905 NTPv4 Server

o NTP Broadcast Mode
o NTP Multicast Mode
o NTP Client for additional NTP Servers (redundancy)
o SNTP Server
o NTP Symmetric Key Encryption
o NTP Autokey Encryption
o NTP Access Restrictions

• SINEC H1 time datagram (Activation Key necessary)

• RFC-867 DAYTIME Server

• RFC-868 TIME Server

• Precision Time Protocol (PTP) according to IEEE Std 1588™-2008 (Activation Key

necessary)

o IEEE Standard Profile for Use of IEEE 1588™ Precision Time Protocol

in Power System Applications (Power Profile) according
to IEEE Std C37.238™-2011

NETWORK CLOCK DEVICE 8030HEPTA/NCD

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Elektronik GmbH

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Network Configuration (Activation Key necessary)

• Routing

• Bonding (NIC Teaming) Link aggregation according to IEEE 802.1ad

• VLAN support according to IEEE 802.1q

• PRP (Parallel Redundancy Protocol) according to IEC62439-3

System Management (Activation Key necessary)

• E-mail notification

• Syslog messages to external syslog server

• SNMPv2c/v3, SNMP Traps (MIB II, Private Enterprise MIB)

Configuration Channel

• HTTP/HTTPS WebGUI (browser-based)

• Telnet

• SSH

• External LAN configuration tool (

hmc

– Network-Configuration-Assistant)

Additional Features

• Firmware Update via TCP/IP

• Fail-safe

• Watchdog circuit

• Customizable security banner

• NTP local time support

SYSTEM STRUCTURE

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Elektronik GmbH

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2 System Structure

The Network Clock Device 8030HEPTA/NCD consists of the following:

• 1/1 19" module rack 1U/84HP (Slim Line)

• System front panel with LCD-Display (2x40), pushbutton and status LEDs

System front view:

• Wide-ranging power supply unit from 100-240V AC / 20VA (Standard)
or 40VA (47-63Hz). Other input voltages available

• Voltage feed with power switch with connections in accordance with
IEC/EN60320/C14 including EMI line filter

• Connection for protection earth (PE) cables up to 16mm²

• Module 8030NTC

• Module 8030NTS/M

• Space for up to 8 additional output modules depending on system structure

System rear side:

The new designed housing concept allows customized system extensions for additional signal
outputs (processed ex-works) easily and fast.

SYSTEM STRUCTURE

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Elektronik GmbH

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2.1 19 inch Rack 1U/84HP (Slim Line)

2.2 Functional Overview of the Front Panel Elements

This chapter describes the individual function elements of the front and rear panel.

2.2.1 LCD-Display with Pushbutton

The background illumination of the LCD-Display is activated or rather controlled by the
pushbutton Light/Scroll.

The 2x40 LCD-Display enables reading out the time and further essential information for the
commissioning, the operation status, and for support even without WebGUI access.

The operation and function of the pushbutton and the display are described in Chapter 7 LCD-
Display with Pushbutton – Function.

SYSTEM STRUCTURE

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2.2.2 Status-LEDs – System (& Extension)

The Status LEDs on the front panel indicate the current synchronization and operation status
of the Network Clock Device 8030HEPTA/NCD. Meanings of the LEDs are the following:

During the boot process, all LEDs are flashing in a test sequence.

System - Sync

Status LEDs

Green

Red

Sync-Status

Status Code

ON

Off

Sync (radio-synchronous) with quartz regulation

SYNC

Flashes

Off

Sync (radio-synchronous) - SyncOFF timer running

SYOF

ON

Flashes

Sync (radio-synchronous) - simulation mode

SYSI

Flashes

Flashes

Quarz - SyncON timer running

QUON

ON

ON

Quarz - time was set via synchronization source

QUEX

Flashes

ON

Quarz - time set manually or after reset

QUSE

Off

ON

No valid time

INVA

Off

Off

No operating voltage / faulty

---

System - NTC

Status LEDs

NTP-Status

Green

Red

NTP Service

STRATUM

ACCURACY

Off

On

Not Active

---

Low

Flashes 1Hz 50%

On

Active

16

Low

Flashes 1Hz 10%

Off

Active

1-15

Low

Flashes 1Hz 50%

Off

Active

1-15

Medium

On

Off

Active

1-15

High

SYSTEM STRUCTURE

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Elektronik GmbH

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2.2.3 Functional Elements Rear Side

The rear side parts of modules 8030NTC and 8030NTS/M can be found in the individual mod­ule manuals.

2.2.4 Extension Modules 1 - 6 (Option)

All installed system extensions deviating from the standard system 8030HEPTA/NCD includ­ing the pertinent Status LEDs are documented and described in a device-specific supplemen­tary instruction.

FUNCTION PRINCIPLE

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3 Function Principle

This chapter describes the function principle of the Network Clock Device 8030HEPTA/NCD
and the internal relations between the different functional groups.

3.1 Block Diagram

• Time Information
Module 8030NTC provides the time information as well as the particular synchroniza-

tion status to Module 8030NTS/M. With this time and status information the NTP ser­vice running on Module 8030NTS/M and if necessary further signal generations and
network protocols are going to be synchronized.

FUNCTION PRINCIPLE

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3.2 Function 8030NTC

Module 8030NTC is the "heart" of Network Clock Device 8030HEPTA/NCD. The complete
LINUX operating system which provides all functions (e.g. NTP, Web-GUI etc.) runs on this
module. By means of the chosen network time protocol (NTP or PTP) the module-internal
crystal will be adjusted, thus a highly-precise time base for Module 8030NTS/M and, if neces­sary, further signal generations created.

3.3 Function 8030NTS/M

Module 8030NTS/M acts as network time server. A complete LINUX operating system which
provides all functions (e.g. NTP, Web-GUI etc.) runs on this module. Module 8030NTS/M will
be adjusted by the time information provided by Module 8030NTC and provides this time in­formation to all activated network time services.

3.4 LCD-Display with Pushbutton

System settings cannot be changed via the pushbutton nor the display. The display allows the
readout of important system and operation parameters directly at the device, even without
WebGUI access.

Update of the data in both the display and the WebGUI is subject to specific refreshing cycles.
The display indicates if the refreshing cycle is not completed yet.

FUNCTION PRINCIPLE

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Elektronik GmbH

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3.5 System EXTENSION 1 - 8 (Option)

Network Clock Device 8030HEPTA/NCD can be expanded with additional modules ex works.
Therefore four extension slots are available.

Each extension slot can either be equipped with one NTP time server module 8030NTS/M
(each with two GigaBit LAN interfaces) or max. two output modules.

Additionally implemented NTP time server modules 8030NTS/M are mutually independent and
are going to be parameterized via their WebGUI. The operating status of each module
8030NTS/M will be displayed via 2 status LEDs on the front panel which are assigned to the
particular module 8030NTS/M via the related EXTENSION number. If the application is exclu­sively equipped with modules 8030NTS/M, max. 4 mutually independent modules 8030NTS/M
can be implemented.

Output modules issue signals of the internal signal generators of module 8030NTC via various
electrical levels or via fiber optic. Parameterization of the particular signal generator can be
done via WebGUI of module 8030NTC. Status of the output modules will not be monitored via
status LEDs on the front panel. If the clock system is exclusively equipped with output mod­ules, max. 8 output modules can be implemented.

System front view:

System rear side / plug-in side:

All installed system extensions deviating from the standard system Network Clock Device
8030HEPTA/NCD including the pertinent Status LEDs are documented and described in a
device-specific supplementary instruction.

SYSTEM BEHAVIOUR

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4 System Behaviour

This chapter describes the behaviour of the system in special operational phases and condi­tions.

4.1 Boot Phase

The boot process of the Network Clock Device 8030HEPTA/NCD starts after turning on the
system or a reset.

This phase can be recognized by the LCD-Display and activated LED test of the Status LEDs
in the front panel.

During the boot process both Modules 8030NTC and 8030NTS/M boots its LINUX operation
system and is therefore not available via LAN.

The end of the boot process is reached when the LCD-Display changes to the standard picture
and the LED test of the Status-LEDs in the front panel has been finished.

Boot phase takes approx. 35 seconds by using static IP-addresses for
ETH0 and ETH1. Boot phase can be extended, depending on the network
configuration in use (e.g. DHCP).

4.2 Adjustment Process

During boot process the activated synchronization service (NTP or PTP) will automatically be
started on Module 8030NTC. After starting the synchronization service the module requires
approx. 5-10 minutes to be adjusted.

After the synchronization service of Module 8030NTC is adjusted, Module 8030NTC provides
a valid sync status to Module 8030NTS/M, whereby Module 8030NTS/M will be synchronized
based on the time information of Module 8030NTC. This requires approx. 5-10 minutes.

After that Module 8030NTS/M will be available as network time server.

4.3 Firmware-Update

Both modules 8030NTC and 8030NTS/M can mutually be updated.
Detailed information can be found in the module specific technical manuals of the modules

8030NTC and 8030NTS/M.

4.4 Activation of Functions (Activation Key)

There are individual, mutually independent activation keys available for module 8030NTC and
8030NTS/M depending on the serial number of the module where the functionality is intended
to be activated.

Detailed information can be found in the module specific technical manuals of the modules
8030NTC and 8030NTS/M.

INSTALLATION

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Elektronik GmbH

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5 Installation

The installation of the Network Clock Device 8030HEPTA/NCD is described below.

5.1 Network Clock Device 8030HEPTA/NCD in 1U Housing

5.1.1 Installation of the 19 Inch Rack

The System is assembled in a 1U/84HP 19" housing for control cabinet installation (measure­ment see Chapter 2.1 19 inch Rack 1U/84HP (Slim Line)).

The following steps are to be carried out:

• Place the rack in the control panel and fix to the mounting brackets on the front side of
the rack using 4 screws.

The side ventilation apertures on the right and left hand sides must not
be covered. Otherwise ventilation will not be effective and lack of con­vection and / or thermal coupling with surrounding equipment may give
rise to an excessive equipment operating temperature.

• Ensure that there is sufficient space between the back of the rack and the control panel
to allow connection and data lines with the system

5.1.2 Earthing

The Network Clock Device 8030HEPTA/NCD is usually earthed via the PE cable of the power
supply.

An additional earth cable for surge protection purposes can be connected by means of the
earth screw located on the rear side of the System housing.

5.1.3 AC Power Supply

The Systems’ standard AC power supply unit is described here. However, the connection data
on the nameplate of the respective unit is always applicable.

Attention should be paid to the following when connecting the power supply:

• Correct voltage type (AC or DC)

• Voltage level

The power feed is via an input connector with EMI filter compliant with IEC/EN 60320-1/C14

I O

• Check that the mains power switch is in position " 0
" (= off).

• Plug the input connector into the System’s mains
power inlet.

• Connect the input connector to the mains power
supply and switch the line circuit breaker on.

The Network Clock Device 8030HEPTA/NCD can be damaged if incorrect
voltage is connected.

INSTALLATION

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Elektronik GmbH

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5.1.3.1 Safety and Warning Instructions

Please read these instructions fully in order to guarantee safe operation of the equipment and
to be able to use all the functions.

Caution: Never work on an open unit when voltage is applied!
Danger to life!

The Network Clock Device 8030HEPTA/NCD is an installation device. Installation and com­missioning may only be carried out by suitably qualified specialist personnel. In doing so the
respective country-specific specifications must be observed (e.g. VDE, DIN).

Before commissioning ensure that:

• The power supply has been connected correctly and electrical shock protection is in
place

• The earth wire is connected

• All supply cables are correctly sized and fused

• All output cables are suitably sized or specially fused for the max. output current of

the equipment

• Sufficient convection is guaranteed

The equipment contains life-threatening components and a high level of stored energy.

5.1.3.2 Power Supply Unit Specifications

All AC power supply specifications are described in Chapter 12 Technical Data.

5.1.3.3 Fusing

Pay attention to the correct fusing of the power supply when connecting the Network Clock
Device 8030HEPTA/NCD.

The corresponding performance data can be taken from the equipment nameplate. The Net­work Clock Device 8030HEPTA/NCD is currently fitted with a power supply unit with a power
consumption of max. 20VA (Standard) or 40VA (47-63Hz).

If the internal fuse (device protection) trips it is highly probable that the
equipment is faulty. In this case the device should be checked in the fac­tory.

INSTALLATION

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Elektronik GmbH

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5.1.4 DC Power Supply (Option)

Ensure that the external power supply is switched off. When connecting the
supply cable make sure that the polarity is correct and the equipment is
earthed.

• The cable of the power supply is connected using a 2-pole
plug connector with additional earth connection and inter­locked with the Network Clock Device 8030HEPTA/NCD:

+Vin:

Positive pole (contact 1)

–Vin:

Negative pole (contact 2)

PE:

Earth

The Network Clock Device 8030HEPTA/NCD can be damaged if incorrect
voltage is connected.

Earthing:

By default the minus pole (-Vin) and earthing (PE) are connected sys­tem-sided.

5.1.4.1 Power Supply Unit Specifications

All DC power supply specifications are described in Chapter 12 Technical Data.

5.1.4.2 Fusing

Pay attention to the correct fusing of the power supply when connecting the Network Clock
Device 8030HEPTA/NCD.

The corresponding performance data can be taken from the equipment nameplate. The Net­work Clock Device 8030HEPTA/NCD is currently fitted with a power supply unit with a power
consumption of max. 20VA (Standard) or 40VA (47-63Hz).

If the internal fuse (device protection) trips it is highly probable that the
equipment is faulty. In this case the device should be checked in the fac­tory.

5.1.4.3 Reverse Voltage Protection

The version of Network Clock Device 8030HEPTA/NCD with DC supply has reverse voltage
protection. This protection prevents damage to the equipment due to an incorrectly connected
DC power supply.

Protection is effected by means of a self-resetting fuse. In the case of reverse polarity, it is
necessary to switch the equipment off for approx. 20 seconds after this fuse has tripped. The
power supply can then be connected with the correct polarity.

INSTALLATION

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5.2 Connection LAN Interface ETH0/ETH1

LNK LED (Green)

Description

Off

10 MBit Ethernet detected

On

100 MBit / 1 GBit Ethernet detected

SPD LED (Yellow)

Description

Off

No LAN connection to a network

On

LAN connection available

Flashes

Network activity at ETH0 (transmission
/ reception)

Pin No.

Assignment

1

TX_DA+

2

TX_DA-

3

RX_DB+

4

BI_DC+

5

BI_DC-

6

RX_DB-

7

BI_DD+

8

BI_DD-

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6 Commissioning

For putting Network Clock Device 8030HEPTA/NCD into operation the application need to be
supplied with voltage; then both modules 8030NTC and 8030NTS/M need to be configured.

For further information for putting the modules into operation please have a look at the indi­vidual module-manuals.

6.1 Switching the Operating Voltage on

AC power supply:

I O

Put the mains power switch into position " I " (on).
The Network Clock Device 8030HEPTA/NCD starts running with

the boot process indicated in the display (see Chapter 6.2 LCD­Display after Switch On / Reset (Boot Phase)).

DC power supply:

Switch on external power supply source.
The Network Clock Device 8030HEPTA/NCD starts running with

the boot process indicated in the display (see Chapter 6.2 LCD­Display after Switch On / Reset (Boot Phase)).

6.2 LCD-Display after Switch On / Reset (Boot Phase)

In the 2x40digit LCD-Display the following start-up picture appears for the boot phase after
switching on or a reset:

h o p f 8 0 3 0 H E P T A / N T C : B o o t i n g . . . S t a t u s - L E D s ( F r o n t ) : L E D - T e s t a c t i v

e

COMMISSIONING

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6.3 Establish the Network Connection via Web Browser

Ensure that the network parameters of the Network Clock Device
8030HEPTA/NCD are configured in accordance with the local network be­fore connecting the device to the network.

Connecting a network to an incorrectly configured Network Clock Device
8030HEPTA/NCD (e.g. duplicate IP address) may cause interference on
the network.

Each of the two Modules of the Network Clock Device 8030HEPTA/NCD is
supplied with:

ETH0 with static IPv4-address

IPv4 address: 192.168.0.1
IPv4 Network mask: 255.255.255.0
Gateway: not set

ETH1 with DHCP

In case it is not known whether the Network Clock Device
8030HEPTA/NCD with a Factory Default setting causes problems in the
network, the basis network parameterization should be executed via a
"Peer to Peer" network connection.

Request the required network parameters from your network administrator
if those are unknown.

The network connection is made via a LAN cable and RJ45 plug (recommended cable type:
CAT5e or better).

6.4 Network Configuration for ETH0 via LAN through

hmc

soft-

ware

After connecting the system to the power supply and creating the physical network connection
to the LAN interface of the modules from the Network Clock Device 8030HEPTA/NCD, the

modules can be searched for on the network via the

hmc (hopf

Management Console).
Then the base LAN parameters (IP address, netmask and gateway or DHCP) may be adjusted
in order to allow accessibility of the Network Clock Device 8030HEPTA/NCD for other systems
on the network.

The SEARCH Function of the

hmc

- Network Configuration Assistant

requires for location and recognition of the desired Network Clock Device

8030NTS/NCD the

hmc

computer in the same SUB Net.

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The base LAN parameters can be set via the

hmc

integrated Network Configuration Assis-

tant.

After a successful start of the

hmc

Network Configuration Assistant and completed search

of the

hopf

LAN devices, the configuration of the base LAN parameters can be done.

The Module 8030NTC of the Network Clock Device 8030HEPTA/NCD is stated as 8030NTC
in the Device List.

The Module 8030NTS/M of the Network Clock Device 8030HEPTA/NCD is stated as
8030NTS/M in the Device List.

If several devices with the same name are listed in the Device List, they can be distinguished
by the Hardware Address (MAC address)

The factory set MAC address for the Network Clock Device
8030HEPTA/NCD can also be read out via the LCD-Display.

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For an extended configuration of the Network Clock Device 8030HEPTA/NCD through a
browser via WebGUI the following base parameters are required:

• Host Name  e.g. hopf8030

• Network Configuration Type  e.g. Static IP Address or DHCP

• IP Address  e.g. 192.168.0.20

• Netmask  e.g. 255.255.224.0

• Gateway  e.g. 192.168.224.1

The hostname must meet the following conditions:

• The hostname may only contain the characters 'A'-'Z', '0'-'9', '-'
and '.' . There should be no distinction between upper-and lower­case letters.

• The character '.' may only appear as a separator between labels
in domain names.

• The sign '-' must not appear as first or last character of a label.

The network parameters being assigned should be pre-determined with
the network administrator in order to avoid problems on the network (e.g.
duplicate IP address).

LCD-DISPLAY WITH PUSHBUTTON – FUNCTION

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7 LCD-Display with Pushbutton – Function

System settings cannot be changed via the pushbutton nor the display. The display allows the
readout of important system and operation parameters directly at the device, even without
WebGUI access.

The data indicated in the display are applicable to updating-cycles such as the WebGUI. An
on-going process is indicated via the display.

When the display has been activated by pressing a key, the backlight turns off after approx.
4 minutes without pressing any further key and the display switches to the standard image.

Switching on the System

In the 2x40digit LCD-Display the following start-up picture appears for the boot phase after
switching on or a reset:

h o p f 8 0 3 0 H E P T A / N T C : B o o t i n g . . . S t a t u s - L E D s ( F r o n t ) : L E D - T e s t a c t i v

e

7.1 Pushbutton Function (Light / Scroll)

The pushbutton has 3 functions right now:

1. Activation of the backlight (if not already been activated).

2. Switching to the next displayed image

3. If the pushbutton is pressed longer than 5 seconds, it is switched between UTC and
local in the standard display image when the key is released. This switching over is
failsafe stored.

7.2 Standard Display Image

This chapter describes the different elements and functions of the standard display image.

7.2.1 Standard Display Image without valid Time

After the start-up screen, the following picture appears in the display during the first start-up
or after a de-energized state

The following picture (with incrementing second) is displayed during the first start-up or after
a de-energized state at the start screen:

U T C 0 0 : 0 0 : 3 8 N T C S Y S T E M - S T A T U S : I N V A M O 0 1 / J A N / 0 0 0 0 T : 0 0 N T P : S T R A T U M - - / L O W

U T C 0 0 : 0 0 : 3 8 N T C S Y S T E M - S T A T U S : I N V A M O 0 1 / J A N / 0 0 0 0 P T P : 0 n s

After a power failure less than 3 days the display starts with the internal
backup clock information if a time information exists.

If the Sync Source ERROR "RTC error" is enabled after switching on with­out valid time, this can be corrected by releasing a Reset of the Sync
Source.

LCD-DISPLAY WITH PUSHBUTTON – FUNCTION

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7.2.2 Standard Display Image with valid Time

Example image for the standard display after a system start with valid backup information or
after manual input of the time information via the WebGUI:

U T C 1 6 : 2 5 : 5 8 N T C S Y S T E M - S T A T U S : Q U S E T U 1 2 / J A N / 2 0 1 6 N T P : S T R A T U M 1 6 / L O W

U T C 1 6 : 2 5 : 5 8 N T C S Y S T E M - S T A T U S : Q U S E

T U 1 2 / J A N / 2 0 1 6 P T P : 1 1 0 n s

Time Information:

LOC 10:25:19 /D

Display with the setting: local time.

• D for summertime (Daylight-Saving Time)

• S for standard time (wintertime)

UTC 08:25:19

Display with the setting: UTC time.

MO - TU - WE - TH -
FR - SA - SU

Display with the Weekday in abbreviations:
complies with MONDAY – SUNDAY

12/JAN/2016

Display of date: Day / Abbr. of Month / Year

It can be switched between UTC and local time as time basis for the display
by using the button.
Therefore the pushbutton must be pressed for 5 seconds.

System-Status:

SYNC

Time synchronized + Quartz regulation started/running

SYOF

Time synchronized + SyncOFF running

SYSI

Time synchronized as simulation mode
(without actual GPS reception)

QUON

Quartz/Crystal time + SyncON running

QUEX

Quartz/Crystal time (in freewheel after synchronization failure
 Board was already synchronized)

QUSE

Quartz/Crystal time after reset or manual setting

INVA

Invalid time

NTP-Status:

The current Stratum and accuracy value of the NTP service is shown here.

PTP-Status:

Hereby the current time deviation to the PTP grandmaster will be displayed.

LCD-DISPLAY WITH PUSHBUTTON – FUNCTION

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7.2.3 Standard Display with Additional Information

In the standard display further systemically significant information/conditions are displayed as
soon as they occur.

U T C 1 6 : 2 5 : 5 8 N T C S Y S T E M - S T A T U S : T U 1 2 / J A N / 2 0 1 6 8 0 3 0 H E P T A U p d a t e

Active additional information automatically leads to the activation of the backlight.
Supplementary information is indicated alternating to the standard content of the display. Such

additional information include following details/conditions:

1. Announcement active (see Chapter 7.6 Announcements (Summertime / Leap
Second))

2. An Image-Update of Module 8030HEPTA/NCD is active

3. A H8-Update of the Sync Source is active

7.3 GENERAL ERROR

Should a failure occur within the system not ensuring a defined and safe operation of the Time
Server 8030HEPTA/NCD anymore this is indicated via the LCD-Display.

If there is an active GENERAL ERROR, the backlight is activated.
If such an error occurs it is recommended to disconnect the system from power for 30 seconds

and then turn it on and put it into operation again. If the failure occurs again after this process,
the system needs to be sent for repair or rather contact the

hopf

Support with the appropriate

failure report (see Chapter 10.2 Support by Company hopf).

Example:

G E N E R A L - E R R O R : N O D A T A F R O M S Y N C - S O U R C E T u r n O

F F / O N p o w e r m a y s o l v e t h e p r o b l e m

LCD-DISPLAY WITH PUSHBUTTON – FUNCTION

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7.4 LAN Parameter

The 3 display pictures of the LAN parameter indicate essential information on the active LAN
interface ETH0 / ETH1 and in PRP- resp. Bonding-Mode.

In the display picture the currently valid values of the IPv4 address, netmask and gateway are
shown and whether the values are statically assigned via the WebGUI or via DHCP.

Example for ETH0:

E T H 0 : S T A T I

C I P : 1 9 2 . 1 6 8 . 0 0 0 . 0 0 1 / N M : 2 4 L i n k : U p G W : 0 0 0 . 0 0 0 . 0 0 0 . 0 0 0

Example for ETH1:

E T H 1 : D H C P I P : 0 0 0 . 0 0 0 . 0 0 0 . 0 0 0 / N M : 0 0 L i n k : D o w n G W : 0 0 0 . 0 0 0 . 0 0 0 . 0 0 0

Example for PRP / Bonding:

P R P : S T A T I

C I P : 1 9 2 . 1 6 8 . 0 0 0 . 0 0 1 / N M : 2 4 L i n k : U p G W : 0 0 0 . 0 0 0 . 0 0 0 . 0 0 0

For the non-active interface mode the following pictures are displayed:
Example for ETH0:

E T H 0 : B o n d i n g o r P R P i s a c t i v e L i n k : U p

Example for ETH1:

E T H 1 : B o n d i n g o r P R P i s a c t i v e

L i n k : D o w n

Example for PRP / Bonding:

B o n d i n g a n d P R P i s n o t a c t i v e

LCD-DISPLAY WITH PUSHBUTTON – FUNCTION

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7.5 Local Time Parameter

Provided a local time via the input of difference time to UTC and/or switching points for the
summertime is parameterized, these values can be read in the display.

Example:

T i m e - Z o n e S - > D 0 2 : 0 0 S U 2 7 / 0 3 / 2 0 1 6 O f f s e t : + 0 1 : 0 0 D - > S 0 3 : 0 0 S U 3 0 / 1 0 / 2 0 1

6

The difference time to UTC was set to +1h in the above example. Based on the general pa­rameters for the summer-/wintertime changeover set in the WebGUI, the following switching
points are calculated for the current year (2016) by the system:

• Start of summertime (S  D) on Sunday, 27 March 2016 at 2.00 o’clock

• End of summertime (D  S) on Sunday, 30 October 2016 at 3.00 o’clock

Without valid time (System-Status INVA) the real values for the ST/WT changeover cannot be
calculated.

M i s s i n g D a t a M i s s i n g D a t a

Should the ST/WT changeover be disabled, it is shown in the display as follows:

T i m e - Z o n e S - > D c h a n g e o v e r d i s a b l e d O f f s e t : + 0 1 : 0 0 D - > S c h a n g e o v e r d i s a b l e d

Should the difference time and/or ST/WT changeover not be initially set by the user (in this
case at least one Sync Source ERROR is active), the following picture is displayed:

T i m e - Z o n e O f f s e t a n d / o r D S T C h a n g e o v e r n o t i n i t i a l l y s e t b y U S E R

7.6 Announcements (Summertime / Leap Second)

In this picture the availability of an announcement for a summer-/wintertime changeover (DST­Announcement) or for inserting a leap second (Leap Second Announcement) is indicated.

Should an announcement be available, this is signalized in the standard im­age.

Example:

D S T - A n n o u n c e m e n t : A C T I V E L e a p s e c o n d - A n n o u n c e m e n t : N o t a c t i v e

In the above picture a summer-/wintertime changeover is processed on the next hour change.

HTTP/HTTPS WEBGUI – WEB BROWSER CONFIGURATION INTERFACE

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7.7 System-Info

In the pictures with the system info, the uptime of the system, program versions and the serial
numbers of the components are indicated.

In the display picture SYS-Info 01 the uptime and the image version of the Module 8030HEPTA
are stated.

Example:

S Y S - I n f o : U p t i m e : 0 0 0 1 - D a y / 0 2 - H o u r / 5 3 - M i n 0 1 / 0 3 I m a g e : 0 4 . 0 0 P D a t e : 0 8 . 0 1 . 2 0 1 8

In the display image SYS-Info 02 the serial number and the H8 processor version of the Mod­ule 8030HEPTA are shown in the first line, whereas in the second line the serial number of
the Sync Source and its H8 processor version are stated.

Example:

S Y S - I n f o : 8 0 3 0 - 0 1 0 1 3 3 P 0 1 . 0 0 - 0 2 . 0 8 . 2 0 1 6 0 2 / 0 3

The display image SYS-Info 03 indicate device information exclusively required by the

hopf

Support.
Example:

S Y S - I n f o : 0 1 1 5 1 1 B 4 0 0 1 8 9 9 9 9 9 9 9 9 9 A 0 0 0 1 0 8 0 6 0 3 / 0 3 1 3 0 0 0 0 0 0 0 1 3 8 3 F 0 0 0 8 0 2 1 0 1 3 0 0 0 2

8 HTTP/HTTPS WebGUI – Web Browser Configuration

Interface

Detailed information can be found in the module specific technical manuals of the modules
8030NTC and 8030NTS/M.

SSH AND TELNET BASIC CONFIGURATION

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9 SSH and Telnet Basic Configuration

Only basic configuration is possible via SSH or Telnet. The complete con­figuration of the Network Clock Device 8030HEPTA/NCD takes place ex­clusively via the WebGUI.

It is just as easy to use SSH (Port 22) or Telnet (Port 23) as the WebGUI. Both protocols use
the same user interface and menu structure.

The user names and passwords are the same as on the WebGUI and are kept in alignment.

SSH does not allow blank passwords for safety reasons.

The corresponding protocols should be enabled for the use of Telnet or
SSH.

The navigation through the menu takes place by entering the respective number associated
with the menu option (as can be seen in the above image).

FAULT ANALYSIS / TROUBLESHOOTING

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10 Fault Analysis / Troubleshooting

This chapter explains different error patterns and the process to contact the

hopf

support

team.

10.1 Error Patterns

This chapter describes various error patterns which enable the customer to make a preliminary
problem analysis. In addition they also provide assistance in describing the error when con-

tacting the

hopf

support.

If possible, for each problem the entire status in the tab GENERAL via
WebGUI should always be checked.

10.1.1 Complete Failure

Description

• The Status LEDs on the rear panel are off

Cause / Problem Solution

• Device is switched off

• Voltage supply failure

• Power supply defective

10.2 Support by Company

hopf

Should the system show any other failures than listed in Chapter 10.1 Error Patterns, please
contact the support of company

hopf

Elektronik GmbH by providing an exact failure descrip-

tion and the following information:

If possible, for each problem the Configuration File in the tab DEVICE
should be downloaded from both modules and be sent to the

hopf

sup-

port.

• With the file System Configuration or if not possible with the serial number of the
System

• When does the error occur: During commissioning or operation

• Exact error description

Please write to the following E-mail address with the above information:

[e-mail]

Providing a detailed error description and above listed information avoid the
need for additional clarification and leads to a faster processing by the sup­port team.

MAINTENANCE

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11 Maintenance

The Network Clock Device 8030HEPTA/NCD is generally maintenance-free. The following
points should be observed if a cleaning of the system might be necessary.

11.1 General Guidelines for Cleaning

The following must not be used to clean the Network Clock Device 8030HEPTA/NCD:

• Fluids

• Cleaning agents containing solvents

• Cleaning agents containing acids

• Abrasive media

The use of such cleaning agents or media could damage the Network Clock Device
8030HEPTA/NCD.

Do not use a wet cloth to clean the Network Clock Device
8030HEPTA/NCD.

There is the danger of an electric shock.

To clean the Network Clock Device 8030HEPTA/NCD use a cloth that is:

• Antistatic

• Soft

• Non-fabric

• Damp

11.2 Cleaning the Housing

Make sure that connections or cables are not loosened while cleaning the
housing of the Network Clock Device 8030HEPTA/NCD. There is the dan­ger of damage and functionality loss.

11.3 Cleaning the Display and Front Panel

Minimum pressure should be exerted when cleaning the display and push button. Excessive
pressure may cause mechanical damage.

TECHNICAL DATA

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12 Technical Data

The company

hopf

reserves the right to hardware and software altera-

tions at any time.

12.1 General – 8030HEPTA/NCD

General Data – System 8030HEPTA/NCD

Housing design:

Sheet steel / Aluminium, closed

Housing dimensions:

See Chapter 2.1 19 inch Rack 1U/84HP (Slim Line)

Protection type of the housing:

IP20

Protection class:

I, with PE connection. Additional earth screw for ca­bles up to 16mm2

Cooling:

Passive, ventilation slots left / right

Weight:

Approx. 3kg

AC Power Supply

(with wide input range)

Power supply capacity

20VA (Standard)

Power supply capacity

40VA

Nominal input voltage:

100-240V AC / 47-63Hz

Connection via input connector compliant with

IEC/EN 60320-1/C14 with EMI line filter and switch

Input voltage range:

85-264V AC

Frequency:

47-63Hz

Current consumption (at nomi­nal values):

about 0.37A (120V AC)

0.23A (230V AC)

about 0.80A (120V AC)

0.40A (230V AC)

Starting current:

Typ. 15A (IO = 100%) 120V AC
Typ. 30A (IO = 100%) 230V AC

Mains failure bridging
at nominal load:

> 20msec. (> 100V AC)

Turn-on time after application of
mains voltage:

< 500msec.

Transient overvoltage protection:

Overvoltage category II (EN 60664-1)

Input fuse - internal:

2A (equipment protection)

Recommended pre-fuse:

Line protection switch 6A, 10A

characteristic B (EN 60898)

PE leakage current:

< 0.75mA (60Hz, compliant with EN 60950)

Insulation voltage input / PE:

2000V AC, 1 minute, residual current = 10mA, 500V DC,

50M at least (at room temperature)

Output Data (internal only)

Internal nominal output voltage:

5V DC

Nominal output current
IN 0°C .. +55°C:

3A (U

OUT

= 5V DC)

6A (U

OUT

= 5V DC)

Efficiency:

> 74%

(at 230V AC and nominal values)

> 75%

(at 230V AC and nominal values)

TECHNICAL DATA

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DC Power Supply (Option)

Power supply capacity 20VA (Standard) / 40VA - Op-

tion

Nominal input voltage:

24V DC

48V DC

110/220V DC

Input voltage range:

18-36V DC

36-76V DC

100-250V DC

Current consumption
(at nominal values):

20VA power supply:

20VA power supply:

20VA power supply:

0.69A

0.35A

0.40A

40VA power supply:

40VA power supply:

40VA power supply:

1.36A

0.68A

0.40A

Turn-on time after applica­tion of mains voltage:

< 200msec.

< 200msec.

< 500msec.

Input fuse - internal (equip­ment protection):

20VA power supply:

20VA power supply:

20VA power supply:

2A fast-acting

1A fast-acting

2A

40VA power supply:

40VA power supply:

40VA power supply:

4A fast-acting

2A fast-acting

2A

Insulation voltage
input / output:

1.500V DC

1 minute,

500V DC 50M at
least (20°C 15°C)

1.500V DC

1 minute,

500V DC 50M at
least (20°C 15°C)

2000V AC,

1 Minute, residual cur-

rent = 10mA,

500V DC, 50M at

least (at room temp.)

Output Data (internal only)

Internal nominal output volt­age:

5V DC

5V DC

5V DC

Nominal output current
IN 0°C ... +55°C

20VA power supply:

20VA power supply:

20VA power supply:

3A (U

OUT

= 5V DC)

3A (U

OUT

= 5V DC)

3A (U

OUT

= 5V DC)

40VA power supply:

40VA power supply:

40VA power supply:

6A (U

OUT

= 5V DC)

6A (U

OUT

= 5V DC)

6A (U

OUT

= 5V DC)

Efficiency:

> 90%

> 90%

> 74%

Ambient Conditions

Temperature range:

Operation:

0°C to +55°C

Storage:

-20°C to +75°C

Humidity:

max. 95%, non condensing

CE Conformity

EMV Directive 2014/30/EU

EN 55022 : 2010 / AC : 2011

EN 61000-3-2 : 2006 / A2 : 2009, EN 61000-3-3 : 2013

EN 55024 : 2010

Low Voltage Directive 2014/35/EU

EN 60950-1 : 2006 / AC : 2011

MTBF

MTBF

> 200,000h

FACTORY DEFAULTS OF TIME SERVER 8030HEPTA/NCD

8030HEPTA/NCD Network Clock Device - V04.00 37 / 43

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

13 Factory Defaults of Time Server 8030HEPTA/NCD

The factory settings of the two modules of the Network Clock Device 8030HEPTA/NCD can
be found in the respective module description.

14 Glossary and Abbreviations

14.1 NTP-specific Terminology

Stability

The average frequency stability of the clock system.

Accuracy

Specifies the accuracy in comparison to other clocks.

Precision of a clock

Specifies how precisely the stability and accuracy of a
clock system can be maintained.

Offset

This value represents the time difference between two
clocks. It is the offset by which the local time would have to
be adjusted in order to keep it congruent with the reference
clock.

Clock skew

The frequency difference between two clocks
(first derivative of offset over time).

Drift

Real clocks vary in frequency difference (second derivative
of offset over time). This variation is known as drift.

Roundtrip delay

Roundtrip delay of an NTP message to the reference and
back.

Dispersion

Represents the maximum error of the local clock relative to
the reference clock.

Jitter

The estimated time error of the system clock measured as
the average exponential value of the time offset.

GLOSSARY AND ABBREVIATIONS

8030HEPTA/NCD Network Clock Device - V04.00 38 / 43

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

14.2 Abbreviations

D, DST

Daylight Saving Time

ETH0

Ethernet Interface 0

ETH1

Ethernet Interface 1

FW

Firmware

GPS

Global Positioning System

HW

Hardware

IF

Interface

IP

Internet Protocol

LAN

Local Area Network

LED

Light Emitting Diode

NTP

Network Time Protocol

NE

Network Element

OEM

Original Equipment Manufacturer

OS

Operating System

PTP

Precision Time Protocol

PRP

Parallel Redundancy Protocol

RFC

Request for Comments

SNMP

Simple Network Management Protocol (handled by more than 60 RFCs)

SNTP

Simple Network Time Protocol

S, STD

Standard Time

TCP

Transmission Control Protocol

http://de.wikipedia.org/wiki/User_Datagram_Protocol

ToD

Time of Day

UDP

User Datagram Protocol

http://de.wikipedia.org/wiki/User_Datagram_Protocol

UTC

Universal Time Coordinated

VLAN

Virtual Local Area Network

WAN

Wide Area Network

msec

millisecond (10-3 seconds)

µsec

microsecond (10-6 seconds)

ppm

parts per million (10-6)

GLOSSARY AND ABBREVIATIONS

8030HEPTA/NCD Network Clock Device - V04.00 39 / 43

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

14.3 Definitions

An explanation of the terms used in this document.

14.3.1 DHCP (Dynamic Host Configuration Protocol)

DHCP makes it possible to integrate a new computer into an existing network with no addi­tional configuration. It is only necessary to set the automatic reference of the IP address on
the client. Without DHCP, relatively complex settings need to be made. Beside the IP address,
further parameters such as network mask, gateway and DNS server have to be entered. A
DHCP server can assign these parameters automatically by DHCP when starting a new com­puter (DHCP client).

DHCP is an extension of the BOOTP protocol. A valid IP address is allocated automatically if
a DHCP server is available on the network and DHCP is enabled.

See RFC 2131 Dynamic Host Configuration Protocol for further infor­mation.

14.3.2 NTP (Network Time Protocol)

Network Time Protocol (NTP) is a standard for the synchronization of clocks in computer sys­tems via packet-based communication networks. Although it is processed mainly over UDP, it
can also be transported by other layer 4 protocols such as TCP. It was specially developed to
facilitate reliable timing via networks with variable packet runtime.

NTP uses the Marzullo algorithm (devised by Keith Marzullo of the San Diego University in his
dissertation) with a UTC timescale and supports leap seconds from Version 4.0. NTP. It is one
of the oldest TCP/IP protocols still in use. It was developed by David Mills of the University of
Delaware and published in 1985. The protocol and UNIX implementation continue to be de­veloped under his direction. Version 4 is the up to date version of the protocol. This uses UDP
Port 123.

NTPv4 can maintain the local time of a system to an accuracy of some 10 milliseconds via the
public Internet. Accuracies of 500 microseconds and better are possible under ideal conditions
on local networks.

With a sufficiently stable, local clock generator (oven-stabilised quartz, rubidium oscillator,
etc.) and using the kernel PLL (see above), the phase error between reference clock generator
and local clock can be reduced to something of the order of a few hundred microseconds. NTP
automatically compensates for the drift of the local clock.

NTP can be installed over firewalls and offers a range of security functions.

See RFC 5905 for further information.

GLOSSARY AND ABBREVIATIONS

8030HEPTA/NCD Network Clock Device - V04.00 40 / 43

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

14.3.3 SNMP (Simple Network Management Protocol)

Simple Network Management Protocol (SNMP) is a network protocol which was developed by
the IETF in order to be able to monitor and control network elements from a central station.
This protocol regulates the communication between the monitored devices and the monitoring
station. SNMP describes the composition of the data packets which can be transmitted and
the communication procedure. SNMP was designed in such a way that every network-com­patible device can be integrated into the monitoring. Functions of the network management
which can be provided by SNMP include:

• Monitoring of network components

• Remote control and configuration of network components

• Fault detection and notification

Due to its simplicity, SNMP has become the standard which is supported by most management
programmes. SNMP Versions 1 and 2c hardly offer any safety mechanisms. The safety mech­anisms have been significantly expanded in the current Version 3.

Using description files, so-called MIB’s (Management Information Base), the management
programmes are able to represent the hierarchical structure of the data of any SNMP agent

and to request data from them. In addition to the MIB’s defined in the RFC’s, every software

and hardware manufacturer can define his own so-called private MIB’s which reflect the spe­cial characteristics of his product.

14.3.4 TCP/IP (Transmission Control Protocol / Internet Protocol)

TCP and IP are generally used concurrently and thus the term TCP/IP has become established
as the standard for both protocols.

IP is based on network layer 3 (layer 3) in the OSI Layer Model whereas TCP is based on
layer 4, the transport layer. In other words, the expression TCP/IP signifies network commu­nication in which the TCP transport mechanism is used to distribute or deliver data over IP
networks. As a simple example: Web browsers use TCP/IP to communicate with web servers.

14.3.5 PTP (Precision Time Protocol)

The Precision Time Protocol (PTP) is a standard for synchronising clocks in computer net­works. Unlike NTP it focuses on a higher accuracy and local networks.

In a network with several PTP-devices, every PTP-device executes the Best Master Clock­algorithm, to determine which PTP-device has the highest accuracy. That PTP-device serves
as reference clock and is called Grandmaster Clock.

The Grandmaster Clock sends SYNC messages periodically to distribute the actual time to
the slaves. The slaves periodically send Delay Request- or Path Delay Request-messages to
the Grandmaster Clock. The Grandmaster Clock replies to those messages with a Delay Re­spond or Path Delay Respond message. The PTP-devices take sending and reception
timestamps of those messages and attach those timestamps to the messages. These
timestamps allow the slave to calculate the network delay and the exact actual time. For cal­culating the network delay the slave assumes, that the network delay in both directions is the
same.

The PTP-devices use either Ethernet or UDP for their network communication. UDP uses the
Ports 319 and 320.

GLOSSARY AND ABBREVIATIONS

8030HEPTA/NCD Network Clock Device - V04.00 41 / 43

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

14.4 Accuracy & NTP Basic Principles

NTP is based on the Internet protocol. Transmission delays and errors as
well as the loss of data packets can lead to unpredictable accuracy data
and time synchronization effects.

NTP protocol neither defines nor guarantees the accuracy or correctness
of the time server.

Thus the QoS (Quality of Service) used for direct synchronization with GPS or serial interface
does not apply to synchronization via NTP.

In simplified terms, accuracies of between 1msec and 1sec can be expected, depending on
the accuracies of the servers used.

The accuracy of IP-based time synchronization is depending on the following criteria:

• Characteristics and accuracy of the time server / time signal used

• Characteristics of the sub-network

• Characteristics and quality of the synchronization client

• The algorithm used

NTP has a variety of algorithms to equalise the possible characteristics of IP networks. Algo­rithms also exist to equalise the offset between reference time source and the local clock.

However, under some circumstances it is not possible to provide an algorithmic solution.
For example:

1. Time servers which do not deliver any correct time cannot be detected at all. The only
option available to NTP is to mark these time servers as FALSETICKERS in compar­ison to other time servers and to disregard them. However, this means that if only 2
time servers are configured, NTP has no way of determining the correctness of the
individual times and clearly identifying which time is incorrect.

2. Asymmetries in the transmission between NTP servers and NTP clients can neither
be measured nor calculated by NTP. NTP works on the assumption that the transmis­sion path to the NTP server is exactly as long as the return path. The NTP algorithm
can only filter out changes on a statistical basis. The use of several servers makes it
possible for the combining algorithm to pick up and filter out any such errors. However,
there is no possibility of filtering if this asymmetry is present on all or most of the NTP
servers (faulty routing etc).

3. It goes without saying that the accuracy of the synchronised time cannot be better
than the accuracy resolution of the local clock on the NTP server and NTP client.

GLOSSARY AND ABBREVIATIONS

8030HEPTA/NCD Network Clock Device - V04.00 42 / 43

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

With reference to the above mentioned error circumstances, the delivered time offset of the
NTP should be considered to be at best the most favourable case and in no way to be a value
that takes account of all possible errors.

In order to resolve this problem, NTP delivers the maximum possible error in relation to the
offset. This value is designated as the synchronization distance ("LAMBDA") and is the sum
of the Root Dispersion and half of the Root Delay of all NTP servers used. This value de­scribes the worst possible case and thus the maximum error that can be expected.

Finally, please note that the user of the Time Server is responsible for the network conditions
between the Time Server and the NTP clients.

As an example, we mention the case where a network has a delay of 500msec and an accu­racy shift (asynchronous) of 50msec occurs. The synchronised clients will therefore NEVER
achieve accuracy values of one millisecond or even microseconds!

The accuracy value in the GENERAL tab of the WebGUI is designed to help the user to esti­mate the accuracy.

LIST OF RFCS

8030HEPTA/NCD Network Clock Device - V04.00 43 / 43

hopf

Elektronik GmbH

Nottebohmstr. 41 • D-58511 Lüdenscheid • Tel.: [phone] • Fax: [phone] • Internet: http://www.hopf.com • E-Mail: [e-mail]

15 List of RFCs

• NTPv4 - Protocol and Algorithms Specification (RFC 5905)

• NTPv4 - Autokey Specification (RFC 5906)

• PPS API (RFC 2783)

• DHCP (RFC 2131)

• Time Protocol (RFC 868)

• Daytime Protocol (RFC 867)

• HTTP (RFC 2616)

• HTTPS (RFC 2818)

• SSH-2 (RFC 4250-4256, 4335, 4344, 4345, 4419, 4432, 4716, 5656)

• TELNET (RFC 854)

• SNMPv2c (RFC 1213, RFC1901-1908)

• SNMPv3 (RFC 3410)

• SYSLOG (RFC 5424)

• SMTP (RFC 5321)

16 List of Open Source Packages Used

The

hopf

Network Clock Device 8030HEPTA/NCD includes various software packages
which are subject to other license conditions. In case the use of such a software package
might violate the licence conditions

hopf

will ensure immediately after written notice that the

licence conditions are met again.
If the underlying licence conditions relating to a specific software package require availibility

of the source code the package is provided electronically (email, download etc.) on request.
Detailed information can be found in the module specific technical manuals of the modules

8030HEPTA and 8030NTS/M.