CBUS DCC system Operating Instructions
Contents
1. functions FO FL to F9 When you press a number button the function number will show in the display for as long as you hold the button down To select functions above F9 press the Fr1 function range 1 button The display will add Fr1 to the bottom line Now the numbers represent functions F10 to F19 The correct Fn number will be shown in the display For numbers above F19 press the Fr2 button Now you have functions F20 to F28 There is no F29 defined by the NMRA Note The CS only holds functions FO to F12 in its stack and only these are refreshed regularly Higher functions are sent once when the button is pressed Page 4 Programming The CAB allows you to program any loco CV with any value using OTM on the main programming Not all decoders may allow you to change some CVs using this method First select a loco as above Check it drives Then press the Prog button The display shows CVnumber Key in the CV number and press Enter Display now shows CV Value Key in the CV value decimal and press Enter The CV is now programmed into the loco The CV range is 1 to 1024 The CV value range is 0 to 255 Note CVs can be changed while the loco is moving However the process may not be 100 reliable if the track contact is poor during the programming sequence You can always try again You can cancel the programming sequence at any stage by pressing Loco Setting a long address The system allows you to set the long address2. of a loco in one stage With a loco selected using its current address long or short press the Prog button twice Display now shows Long Adr Key in the long address 0001 to 9999 Press Enter The long address will be set into the loco Now select the new long address to drive the loco Notes While the present CS supports functions F13 to F28 the CAB does not yet The present system only supports 128 speed steps Eventually it will be possible to program decoders in service mode using the CAB and CS including CV readback This has not been implemented yet The command station supports up to 32 locos simultaneously If you have a selected loco and change your mind about anything just press the Loco button If you have not selected a loco you can t do anything Mike Bolton 31 07 09 Page 5 Upgrade to CAB functions 13 12 09 Following the writing of new code for the Command Station by Andrew Crosland a number of additions have been made to the CAB functions The main addition is the ability to read and write CVs in Service Mode using the programming track capability of the CBUS Command Station The other addition is the ability to select the speed step mode for any loco Service mode operation A loco must first be selected This may be any valid number and doesn t need to be either an actual loco or the one on the programming track Then press the Prog button As before the first press is fo
3. through the 4 modes with the Fr1 button without changing the read write and also change between read and write Fr2 button without changing the mode To exit service mode press Loco This takes you back to operating the selected loco as normal You can leave your loco running while performing service mode operations but you cannot change its speed or direction However all other CABs remain operational so layout running carries on as normal The command station can perform service mode operations and run the layout at the same time However only one CAB at a time may perform service mode operations Speed step setting The CAB now has the ability to set 14 28 and 128 speed steps for any given loco However the choice must be made before the loco is selected With no loco selected the prompt is SEL LOCO At this stage you can select a speed step range with the Fr1 mode button The default setting is 128 step as this is by far the most common If you press the Fri button the display changes to SEL STEP 128 You can cycle through the settings with more presses of the Fr1 button e g SEL STEP or SEL STEP s14 s28 If you are happy with the selected speed step press Enter This will apply to the next selected loco If you deselect release a loco the speed step setting will revert to 128 steps This sequence was chosen as different locos may require different settings with 128 step the most common Once a loco has b
4. 1 Connect the external booster between the 0 and D terminals of J5 A suitable booster is the MERG NB1A CAB wiring The CABs connect to the CBUS using 4 way RJ22 connectors Connect the CS to the CBUS in the usual manner J2 is a CBUS terminal block A 5V supply 1 amp is available on this TB but if the CBUS has a separate 5V supply this should not be connected If the CS is to be attached only to CABs there must be a terminating resistor 68 ohms across the CANH and CANL wires This may be fitted at J2 The CABs are connected to the CBUS via a small adapter PCBs fitted with a RJ22 socket The bus wires may be soldered directly to this PCB or it may be fitted with a CBUS style terminal block 3 5mm spacing Use of a TB allows easy daisychaining Page 1 The CABs plug into the sockets using a standard telephone handset cable the sort used to connect telephone handsets to their bases not the type that connects to the BT wall socket Note These cables are not a one to one connection but are a mirror image at each end The wiring in the CABs allows for this Do not use any other type of connection or the CABs may be damaged Operation Selecting a loco When the CS is powered up with a CAB attached the green LED on the CAB will light and the display will show SEL LOCO Key in the loco number address with the numeric buttons on the CAB Then press the Enter button If the speed control was alrea
5. CBUS DCC system Operating Instructions Introduction The CBUS DCC system comprises 1 A command station CS with integral mini booster programmer 2 CABs or handsets Power supply The CS requires an AC supply of 15V 12 to 16 V ora DC supply of 15 to 24 V The current should be at least 2 amps When power is applied to the CS the green LED should be lit The CABs require a 5V supply which may be taken from the CS or supplied separately DCC boosters The CS has an output for conventional DCC boosters This is a 5 to 15 V DCC signal which will suit most boosters The CS also has a low power output stage which may be used as a mini booster This is set at 1 amp maximum and the DCC voltage is again adjustable It is not possible to use this output stage as a mini booster and a service mode programmer at the same time The mini booster output is short circuit protected This does not affect the separate DCC booster output Adjusting the output voltage The CS has a small trimpot for setting the output voltage labelled VR1 This voltage is common to the mini booster and DCC outputs Apply power to the CS Attach a voltmeter between the 0 and outputs of J5 Turn VR1 till the voltage is the desired value For use as a booster set to 12 to 14V If driving a separate booster 12V is recommended Attaching a booster The CS supplies a DCC signal which a positive waveform from OV to V where V is the voltage set by VR
6. Pressing the Fr2 button also to be labelled R W toggles between CV read and CV write The display changes accordingly so if you were in the Prog Dir CV mode pressing the Fr2 button once now shows Read Dir CV Enter the CV number N to be read and press Enter Response is CV N Val Where Val is the CV value in decimal Again if there is no acknowledgement or an overload the bottom line displays the condition in the same way as for programming Pressing the Prog button allows you to read another CV For direct mode read the direct bit scheme is used so the read is always fast The Fr1 Mode button is used to sequence through the four possible programming or read modes The sequence is Direct Page Register and Address and then back to Direct For Page mode the display and sequence is the same as for direct mode except the display changes to Prog Pag or Read Pag CV CV For register mode the format is Prog Reg or Read Reg Reg Reg Enter the register number from 1 to 8 Program or read as before For address only operation there is no CV number or register number to enter To program an address you get Prog Adr Adr Enter the address value and press Enter This will be acknowledged or not as the case may be The address is the short address from 1 to 127 To read an address the prompt is Read Adr Adr Page 7 Simply press Enter and the address value will be displayed You can cycle
7. dy at zero fully anticlockwise there will be a short beep and the display will change to show the loco address and speed e g 123 000 If the beep continues and the display does not change turn the speed to zero This is a safety feature to prevent a loco setting off at high speed Addresses The system will accept short or long addresses The short address range is 1 to 127 The long address range is 0001 to 9999 Hence you can have long addresses less than 127 Keying an address greater than 127 will automatically assume a long address You should now be able to drive the selected loco The speed is controlled by the round knob The CABs are designed to be used in the left hand and the knob may be rolled with the thumb However you can also hold the CAB in one hand and operate the knob with the other one The display shows the speed step on the top line 000 to 127 Mistakes If you enter the wrong address press the Loco button This will cancel the number and prompt again SEL LOCO Direction selection Direction is selected using the black button below the two LEDs Pressing this changes direction The red LED shows reverse and the green LED shows forward Page 2 Changing locos The present CABs only allow one loco at a time to be controlled from that CAB If a loco is presently selected press the Loco yellow button The display will show 123 000 RELEASE To release the loco now press Enter This
8. een selected you can t change the speed step without deselecting it first The step setting is maintained during a walkabout but will revert to 128 if the CAB times out Mike Bolton Page 8
9. ncluded in a consist However the DCC standard only allows consist addresses of 1 to 127 It assumes your loco decoder supports advanced consisting Page 3 To put a loco into a consist First select a loco as above Check it runs Select the direction you want it to be in the consist If it is to run forwards in the consist set it to forward If backwards in the consist set it to reverse Press the Consist button green The display will show Consist Key in the address of the consist and Press Enter Changed your mind Press Loco The loco is added to the consist The display now reverts to SEL LOCO This allows you to select another loco to add to the consist as above or to select and drive the consist If the former you enter the address of the new loco if the latter you enter the consist address The consist drives as if it were a single loco To remove a loco from a consist If you are driving the consist release it Loco release enter Then select the loco you want to take out of the consist You will not be able to drive it as it is still consisted but the functions should work see below Now press the Consist button twice Display will show Consist Clear Press Enter and the loco will be released You now have full control of the selected loco Changed your mind Press Loco Functions When you have selected a loco the number buttons send function commands to your loco Numbers 0 to 9 send
10. r CV programming On the Main The second press is for entering a long address in one step Now there is a third press to go into service mode Service mode read and write allows for all the specified modes These are Direct Page Register and Address The default is Direct and write or program So the first message on the third press of the Prog button is Prog Dir CV Enter the CV number N and press Enter Display changes to Prog CV N Where N is the CV number entered CV numbers can range from 1 to 1024 Insert the required CV value as a decimal number V Value range is 0 to 255 Again press Enter If programming is correctly carried out the response is CV N V OK This will be accompanied by a beep If the loco decoder does not acknowledge the event either because there is no loco the decoder is defective or that CV is not supported the response is CV N No Ack Again with a beep If the programmer senses an overload on the programming track in line with the NMRA requirements the response is CV N Over Page 6 Following any of the above operations or if you enter an incorrect number pressing the Prog button takes you back to the previous Service Mode prompt It does not take you back to the On the Main prompt Once in Service Mode it remains there until the Loco button is pressed This allows repeated service mode operations like programming or reading CVs Reading CVs
11. will remove that loco from the Command Station stack It will NOT stop the loco if it is moving The display will again prompt SEL LOCO Select another loco as above If you change your mind about releasing press Loco instead of Enter Walkaround The CABs allow you to disconnect them and reconnect in another socket on the layout without interrupting operation The time allowed for this is about 20 seconds If this time is exceeded the CS releases your loco and control is lost Caution If you leave your CAB disconnected another user may take over your loco If you then replug your CAB it will find your loco again You then can have two CABs controlling one loco To avoid this situation hold the Prog button in bottom right hand corner of the CAB while replugging your CAB This will cancel the information retained in your CAB from the last session This will also be needed if the system was powered up with the CAB disconnected Emergency Stop The CAB has ared Em Stop button Pressing this will cause the loco to stop immediately It overrides any inertia in the loco CV3 and CV4 The display will show 123 001 STOP Note speed 1 is defined as emergency stop To start the loco again turn the speed knob to zero Then increase the speed as before If the soeed was 000 then the button has no effect The Em Stop only applies to your loco not all locos on the layout Consisting The system allows any number of locos to be i
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