Siemens Mobility, Traffic Solutions

Sopers Lane, Poole, Dorset BH17 7ER

ELV and LED Controller Lamp monitor Quick-start Guide

The introduction of LED signals and ELV controllers has meant that finding lamp faults can be complex. The LED optics themselves are quite complicated and have different modes of failure compared to HI lamps. This guide is a supplement to the ST900ELV, ST750ELV and Helios Handbooks the part numbers of which are at the end of this document. There are some pre-requisites when dealing with ELV LED signals: · · · · Setting the correct supply voltage tap. This may result in the need for the transformer to be replaced. KDP=2 must not be used on an ELV controller unless the firmware is PB801 is issue 11 or greater. Ensuring that all optics and near-sides are to the correct issue state. (Technical Bulletins STAB 09-045) If Nearsides are used and the monitor channels are split, use Firmware PB801 issue 10 or greater.

Unlike HI lamps an LED optic switches suddenly between dim and bright states at a set threshold. Until that threshold is reached the light output is maintained as either dim or bright for a wide range of fluctuating supply voltage changes. i.e the voltage rises and/or fall but does not breach the threshold. The result of this is that a number of faults in the optic or the controller can result in the optic being in the wrong brightness state. This will usually be logged as a loss of load, often just after a Dim /Bright change. The most powerful tool to assist in the tracing of lamp faults is the KTR command (K Trace Record). This is a rolling log of all sensors that logs each major change in lamp loads. There are 50 entries per sensor. All of these entries freeze and the state recorded when the first lamp fault is confirmed. In order to use this log you MUST NOT clear the fault log or re-learn the lamp loads. As soon as the lamp fault is cleared this data will be over written so this data needs to be analysed or recorded prior to resetting the log. If the fault is intermittent and clears itself before you are able to recover the KTR logs you can alter the KTE (K Trace Enable) command from the default of 3 to a value of 5. This will prevent the KTR log from resuming once the fault log flag has cleared. Record the fault description and the time stamp from the KTR fault log and the Sensor number and change in load via the KLD command. You can then type in KTR followed by the sensor number. The KTR records are numbered but are rolling so the oldest record may be anywhere within the 50 records. The records are time stamped and from PB801 issue 11 will be dated and time stamped. Use the data from the fault log and you can go to the last record for the sensor. The format of the KTR command is shown below along with an example: KTR ss rr:Aa hh:mm:ss iiiimA vvvV wwwWxy P/Col KTR KTR 2 39:A0 07:17:45 1213mA 497V 36WB B/Green 2 40:A0 07:18:22 1119mA 498V 38WB? B/Red

Looking at the example above: ss is the Sensor number, rr is the record number 0 to 49, Aa is the aspect pattern and number. hh:mm:ss is the time in the Hours:Minutes:Seconds iiii is the current in milliamps , vvvV is the voltage on ELV controller 497V represents 49.7V wwwW is the learned load in the Bright state in Watts. x will be Dim or Bright learnt state and if "y" is "a?" then a load change is being learnt. P is the phase and Col is the Colour shown. Important Note: Full information on the KTR facility can be found in the Handbook 667/HH/32900/000. Version Last Editor Document Name 1 Page 1 of 2 Mike Tonkin LED and LED Monitoring QS guide Status Issue 2 Date 11 November 2010 Doc. No. 667/HQ/32900/000

Copyright © Siemens plc 2010 All Rights Reserved

Siemens Mobility, Traffic Solutions

Sopers Lane, Poole, Dorset BH17 7ER

What to look for: Once the sensor number has been identified: · · · · · · · · · Check for changes in lamp load during the Dim state, normally increases (no fault registered) ­ KTR. Loss of lamp load on the Dim to Bright changes (Bright W - Dim W (12W - 4W approx 8W)- KTR. Excessive volts recorded in dim (above 30V examine possible causes) ­ KTR. Changes to the learned lamp load during normal operation Dim or Bright. Repeated changes in load with no corresponding change to the supply voltage. Ignore large changes on nearsides/demand indicators when they first switch on, providing the current is otherwise stable (usually one large reading lasting about a second). If possible record (using hyperterm or similar) the Data and the fault log entries.. If an optic is replaced it should have a clear fault label. If dealing with an intermittent or elusive fault ensure sufficient information is left in the controller log book to prevent the same optic being replaced when it is not faulty.

Known outstanding issues on Nearside indicators, LED Wait and demand units. Throughout the UK there have been some monitoring problems with both Siemens and AGD units. It should not be assumed that these monitoring problems are the cause of any fault, until the normal causes are eliminated. In particular that: 1. 2. 3. 4. 5. The issue states of the PCB's have been checked (do not rely on the label in the case). Supply voltage has been correctly set up on the Isolation transformer. No more than 4 optics per LSLS output. No additional equipment such as Audio or Tactiles on the same output as signal optics. KDP must not be set =2, unless PB801 is issue 11 or greater

If the problem is intermittent and normal good practice has been followed, (check for loose joints, signs of corrosion etc) then check with Technical Support at Poole Colin Whipps group for further assistance. Recommended method for identifying faulty optics where nothing is obviously wrong Use the KES handset command to measure the current on the affected sensor. Temporarily remove each aspect in turn noting the drop in current each time. This is quicker with two engineers. If safe to do so, also repeat this with the signals forced Dim. Replace any signal that consumes more than 150% or less than 75% of the typical current. (Typical current in bright is approximately 250mA at 48V also varies by lamp colour). Associated Documents

667/HB/32900/000 667/HE/32900/000 667/HH/32900/000 667/HB/32750/000 667/HB/30000/000

General Handbook for the ST900 Family of Traffic Controllers ST900ELV Installation, Commissioning and Maintenance Handbook. Handset Handbook for ST900 and ST750 Families of Traffic Controllers. General Handbook for the ST750ELV. Helios General Handbook

Technical Bulletins and Engineering Change Bulletins.

STAB 09-045 ELV Compatible PCB Variants for Nearsides, Wait & Demand Units STAB 09-047 New AGD ELV Nearside Part Numbers ECNB10-0125 KDP=2 Incompatible on ELV Controllers & LV CLS Retrofit Controllers These can be found on the Technical Support Intranet Web page. Version Last Editor Document Name 1 Page 2 of 2 Mike Tonkin LED and LED Monitoring QS guide Status Issue 2 Date 11 November 2010 Doc. No. 667/HQ/32900/000

Copyright © Siemens plc 2010 All Rights Reserved



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