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ZS070A Industrial Saddle Tank User Notes for ZIMO ActiveDrive Steam Sound Projects V16.03



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ZS070A Industrial Saddle Tank User Notes for ZIMO ActiveDrive Steam Sound Projects V16.03

Please spend a few moments to read these notes which have been produced so that you may obtain the maximum satisfaction from your new sound scheme.

The sounds should work perfectly when the decoder is fitted correctly. Individual locos may require some fine tuning that you can achieve with your DCC controller.

What is ActiveDrive?

This is a system developed to allow you, the user, to change the way that the sounds respond to your driving style or needs. This avoids the need for reprogramming and all the additional costs that would imply.

Operating Your ZIMO Sound Decoder.

As supplied, your new decoder will work in a ‘heavy train’ configuration, but you will be able to switch between the available sounds using your DCC controller by following the straightforward instructions below.
This project utilises Zimo’s ability to switch between the sounds of a heavy train load or sounds of a light engine.
These are all fully configured within the project, waiting for you to make your choice.
You can revert back at any time.

All the CVs have been optimised but you may need to make minor adjustments to perfect it for your individual tastes.

There are many Functions, most of which have an individual sound attached. Some will perform a physical function (like turning on the lamps, if fitted), and some will do both (depending on equipment installed). Please study the list below.

Some of the sounds have a finite length and will play from start to finish when selected. Other sounds will ‘loop’ until switched off, whilst others will vary in length, depending on how you operate the F keys on your DCC controller. I’ll leave you with the pleasure of finding out which is which.

In any of the driving sound sets, increasing the speed step by 1 or more will produce an acceleration sound for a few seconds. If you wish continuous acceleration, ease the throttle setting upwards rather than 0- 128 in one jump!

Similarly, in each sound set, a reduction of 1 speed step or more will stop the exhaust beats and the loco will ‘coast’ (or drift) for a few seconds before resuming exhaust beats. Continuous drifting can be simulated by easing the throttle settings down, one step at a time.

All sounds may be modified (including changing or removing them) individually, and the volume levels of each one may also be varied to your own needs. For this, and much more information on your decoder’s outstanding abilities, please download the latest Decoder Manual from: www.zimo.at/web2010/
You can get advice in English by joining, for free: Zimo-DCC@yahoogroups.com

The Sound Sets
There are three sound sets loaded on your decoder.
Set 1 Heavy Loaded. This is the one to use if you have a heavy train on the hook.
Set 2 Light Engine. At very slow speeds, this set will simulate a very lightly stressed loco. This becomes more aggressive with acceleration, and as speed increases.
Set 3.Work worn locomotive with a leaking cylinder gland. (For this option, CV265 = 3)

Special Zimo Function on F5.

As supplied, it is possible to toggle between Set 1 and Set 2 (change from one to the other and back again) and this may be done even whilst the loco is moving, with no loss of sound. This is useful to vary the sound of the exhaust beats. But it really comes into its own when you run light loco up to a train, couple up and chug away with the heavy sounds.
All you need to do to make this happen is to press F5 on your DCC controller, and press again to change back.

Heavy Mode

This is the default setting. Inertia and momentum have high settings to reflect the high mass of a loaded train. Maximum power would be required on a real loco to lift a heavy train. This means that as well as opening the regulator, the driver would allow maximum steam into the cylinders with the reverser fully open.

During acceleration, the exhaust beats will bark aggressively, but the tone and volume will soften after a few seconds as the real driver would advance the steam cut-off to reduce steam entering the cylinders, increasing the efficiency of the engine.

Light Engine Mode
The default setting is for ‘heavy train’.
Engaging F key 5 will switch the exhaust sounds to a different set of samples, so the ‘chuffing’ is less aggressive in nature and quieter. This represents the reduced ‘cut-off’ on the reverser on real locos.
The Inertia and Momentum settings are automatically reduced when Light Engine Mode is selected. The physical characteristics are changed so the model responds more urgently to control inputs. Acceleration is more brisk and stopping distance is reduced.
Dynamic Inertia
In either Heavy or Light modes, flipping the throttle quickly to high speed steps will cause the model to accelerate 3 times more quickly from standing than if the throttle is gradually opened. This is automatic, no F keys are involved.
So now, the rate of acceleration is determined by how wide you open the regulator, just as it would on a real locomotive.
F2 will give the sound of brake applications. F2 can be ‘dabbed’ or held for varying durations. The sound will respond accordingly.
However, if the throttle is reduced in advance, as a real driver would do, before operating the Brake Key, a braking force will be applied to the motor to slow the road speed more rapidly. This will continue to increase the longer F2 is held. Short dabs will provide speed trimming, held down continuously will result in a controlled ‘Emergency Stop’.

Shunt Mode

Inertia and momentum are reduced to zero plus speed is halved.
Shunt mode in on F Key 20

Live Volume Control
Provide the sound is switched on and the ‘fade’ button is not active, it is possible to change the overall volume to suit changing needs.
Engage F27 and the sound levels will gradually reduce, eventually to silence
Engage F28 and the sound levels will gradually increase, eventually to maximum.
In each case, disengage the F key when the desired level is attained. Set F27 and F28 as ‘momentary’ if your DCC controller allows you to do so.
Note: If the volume controls appear to not function, check that F19, F27 and F28 are disengaged before making a further attempt.

Rod Clank Volume
Many projects have heavy rod clanking included. You can change the volume of these sounds to suit your requirements.
CV286 = 180 is the project default. Higher values will increase volume, lower values will reduce volume relative to the other sounds.

Function Keys List
There are 23 Function Keys used in this sound project. Please see below.Some of the sounds have a finite length and will play from start to finish when selected. Other sounds will ‘loop’ until switched off, whilst others will vary in length, depending on how you operate the F keys on your DCC controller.
Some keys have a control function rather than a sound.

Key Number Sound or Control Function Volume
F0 Loco Lamps (If Fitted) -
F1 Sound ON -
F2 Brake Key – see text for explanation CV517
F3 Bell CV520
F4 Bell CV523
F5 Heavy Train/Light Engine Selection -
F6 Coal Shovelling (This sound is also a random sound) CV529
F7 Live Steam Injector CV532
F8 Blower CV535
F9 Wheel Flange CV538
F10 Whistle CV541
F11 Whistle CV544
F12 Whistle CV547
F13 Safety valve CV550
F14 Buffering CV553
F15 Cylinder Drains Opened CV556
F16 Coupling CV559
F17 Wagons buffering CV562
F18 Guard’s Whistle CV565
F19 Fade All Sounds -
F20 Shunt Mode -
F21 Air pump fast CV677
F22 Air pump slow CV680
F23 Handbrake CV683
F24 Water tank filling CV686
F25 Reserved CV689
F26 Reserved CV692
F27 Overall Volume Down -
F28 Overall Volume Up -

Volume setting range 1 – 255, higher values give louder sounds.
Digitrains & Paul Chetter April 2019
CV Table that follows is a summary of the common user CVs. A complete CV table will be found in the small decoder user manual available for download from the ZIMO Website.

CV Designation Range Default Description
1 Sort Address 1 - 127 3 Active when Bit 5 in CV29 = 0

Start Volts
1 - 252
1 Value at speed step 1. Only applies if Bit 4 of CV29 = 0 otherwise the individual speed table is active.

0 - 255
30 Multiplied by 0.9 equals time in seconds from stop to full speed.
Influenced by sound project.

0 - 255
100 Multiplied by 0.9 equals time in seconds from full speed to stop.
Influenced by sound project.

Top Volts
0 - 252
1 Level applied to the highest speed step in use. Value 0 and 1 = max. Bit 4 in CV # 29 has to be 0 or the individual speed table is active.


Mid Volts 1
A useful value for CV 6 is ¼ to ½ of the value in CV5 1
Default = about 1/3 of top speed
Entered value = internal speed step assigned to the cab’s centre speed step (=step 7,14 or 63 according to the number of speed steps selected: 14, 28 or 128)
Bit 4 in CV # 29 has to be 0 or the individual speed table is active

8 Manufacturer ID
and factory reset
Read Only 145
= ZIMO Setting CV 8 to a value of 8 or 0 will return all CVs to the manufacturer’s default settings. Address = 3
17 & 18
Long Address
128 - 10239
0 The long 5-digit primary address (greater than 127). This address is only active when Bit 5 in CV 29 is on. Otherwise the address entered in CV 1 is active (127 or lower).


Basic Configuration

CV #29 is calculated by adding the value of the individual bits that are to be “ON”:

Values added together to turn Bits “ON”:

Bit 0: 1
Bit 1: 2
Bit 2: 4
Bit 3: 8
Bit 4: 16
Bit 5: 32
Bit 6: not used
Bit 7: not used

0 - 63


This means that bits 1,2 and 3 are turned on. The loco runs on 28/128 speed steps, DC enabled. Bit 0 - Train direction:
off = normal, on = reversed

Bit 1 - Number of speed steps:
off = 14, on = 28
Note: 128 speed steps are always active if corresponding DCC packets are received!

Bit 2 - DC operation (analog): *)
off = disabled on = enabled

Bit 3 - RailCom („bidirectional communication“)
off = deactivated on = activated

Bit 4 - Individual speed table:
nff = CVs # 2, 5 and 6 are active.
on = individual speed table is used as set in CVs 67 – 94.

Bit 5 - Decoder address:
off = short address as per CV 1
on = long address as per CV 17+18

0 -255
65 The recommended range for use without distortion is 0 – 65. Settings above 65 are available subject to experimentation.

267 Chuff Frequency with virtual sensor for steam sound.
0 - 255
70 Active if CV268 value = 0 (Default)
Sets the duration between chuffs; lower settings = more chuffs.
Real cam settings
0 - 255
0 Default = 0 off; CV267 is active.
1 = real cam sensor is active at 1 chuff per trigger

Warnings. Please read before fitting your new decoder.

1, Fit 21 pin decoders yellow component side upwards. Failures caused by fitting incorrectly , usually upside, down are not covered by warranty and will incur a repair cost to obtain a replacement decoder. Always identify the missing pin hole on the underside of the decoder and align it with the missing pin on your loco circuit board. Fitting it any other way will damage your new decoder.
2, Do not leave wire connections bare if modifying wiring to fit your installation requirements. Always use heatshrink insulation. Bare wires kill decoders.
3, On MX645 decoders the stay alive capacitor wires are the blue and grey pair on their own. Blue to the +ve (unmarked) side of capacitor and grey to grey –ve (marked -) side. Then insulate with heatshrink. Wrong way round will blow the capacitor and can damage the decoder! Do not confuse these with function blue and the motor grey wires.
4, Speaker wires, both purple, not polarity sensitive but ensure well insulated as short circuits on speaker output will blow amplifier and this is not covered on the warranty as it isn’t a manufacturing defect but considered as mishandling.
5, Please be sure you are confident working in your locomotives and have the necessary skills to fit the decoders. If not seek the services of a professional.
6, if attaching stay alive capacitors to MX644D decoder use flexible wires, do not solder capacitor legs directly to the solder pads, this will result in the solder pads becoming detached from the decoder

Troubeshooter If decoder appears faulty at any time carry out a project reset setting CV8 to 0. This will restore your decoder to as shipped condition. It will also reset address to 3 again, original sounds will not be lost.

Returns procedure
Zimo decoders do not have a “goof proof warranty”. This means that if the decoder fails as a result of accidental damage such as overloading or a shorted, pinched or uninsulated wire or other installation mistake then the resulting damage to the decoder is not covered. The warranty covers manufacturing defect or failure in correct use during the warranty period which is 1 year from date of purchase. See notes on Rail Exclusive packaging. Returns should be accompanied by the proof of purchase (or a suitable copy), a completed returns form and a covering letter with your contact details and return address etc.

As a rule any decoder returned with no visible evidence of physical damage or burning to the decoder or no evidence of shoddy, damaged or uninsulated wiring or speaker attachment will be replaced for you quickly by us (Digitrains Ltd).
Any decoder sent back in poor condition with obvious burning or wiring damage will be unlikely to have ended up in that condition as a result of manufacturer’s defect. These decoders can be repaired though so all is not lost.
Zimo do operate a fixed fee reconditioning service that will repair a decoder to as new condition for £18.00. The return form’s last field to fill in gives you this option if you had an accident with your decoder. Just select option 2 at the end of the form and it will be understood that your decoder will go away for repair.

Please fill in and return the following section. This form and some proof of purchase from Digitrains Ltd must be included with all returns. A receipt or web order number etc will suffice.
This must include name, address, phone number or email and sound type if applicable.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _


ZIMO Product code __________________ ( E.G. MX632 )

Sound code ------------------------------- (E.G. ZS 25 or class 25 diesel)

Date of return __________________

Purchase Date (accompanied with proof of purchase) _____________________

Digital system used ________________________________________________

Fault description __________________________________________________________________

How did it fail? ____________________________________________________________________

Finally choose between options below

1, Warranty claim or 2, Fixed cost repair request ( underline or circle your choice )

Below please add; Name, Address, Phone number or Email Address.

Delivery & Returns

Delivery & Returns

If returning any product please can you ensure you send it back to us with proof of purchasing, a covering letter and contact details. See terms and conditions for full information on our returns policy.

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