Difference between revisions of "Diesel Version 5:CV 112"

From Train Control Systems Documentation
Jump to navigation Jump to search
 
(4 intermediate revisions by 3 users not shown)
Line 1: Line 1:
 
{{Infobox
 
{{Infobox
 
|title = NMRA CV# 112  
 
|title = NMRA CV# 112  
−
|header1 = *Beta test* Short circuit trip point
+
|header1 = *Beta test* Short circuit trip point Motor offset
 
|label2 = Range of Values
 
|label2 = Range of Values
−
|data2 = 0-255
+
|data2 = 0-15
 
|label3 = Default Value
 
|label3 = Default Value
−
|data3 = 50 (decimal, 0x32 hex)
+
|data3 = 2
 
}}
 
}}
  
−
== NMRA CV 112 (Beta testing short circuit trip point) ==
+
== NMRA CV 112 - Beta testing short circuit trip point motor offset ==
−
This CV is temporarily used for beta testing and can be hard to understand. Only mess with this CV if you find the decoder talking to you and saying there is a [[{{NAMESPACE}}:Short_Circuit_Protection|motor or light short circuit]] when there isn't actually one. TCS is available to help you get this set right. TCS allowed the trip point to be programmable by beta testers because we are assuming not all locomotives act alike and will need customizing. Once we get feedback from the Beta testers we will modify the default values and find an easier way to set this up, thanks for helping us figure out the best values!<br>
+
This CV is temporarily used for beta testing. Only mess with this CV if you find the decoder talking to you and saying there is a [[{{NAMESPACE}}:Short_Circuit_Protection|motor or light short circuit]] when there isn't actually one. TCS allowed the trip point to be programmable by beta testers because we are assuming not all locomotives act alike and will need customizing. Once we get feedback from the Beta testers we will modify the default values, thanks for helping us figure out the best values!<br>
−
CV112 does two things, bits 0-3 allow for more amperage when the motor is running. Bits 4-7 give a baseline amperage level that is active all of the time.<br>
+
CV112 controls how much current is added onto the base trip point in [[{{NAMESPACE}}:CV_111|Short Circuit Trip Point Base CV]] when the motor is running.
−
Each value adds .35Amps to the trip point, and the value can go up to 15. giving a total range of 0 Amps to 5.25 Amps.
+
Each value adds .35 Amps to the trip point, the value can go up to 15. giving a total range of 0 Amps to 5.25 Amps.
−
== Example: ==
+
<br>
−
Set a trip point of 1.05 amps while idling and an additional .7 amps when the motor is on<br>
+
<br>
−
I use hexadecimal numbers (because it makes this bitwise calculation easier), on a windows computer open the calculator, then select "view" then "programmer", then select the radio button that says "hex". If you aren't using a windows computer there do an internet search for hexadecimal calculator, or from a smartphone look for a programmers calculator app, or just call TCS :-)<br><br>
+
''' Example: '''
 +
.7 amps when the motor is on in addition to the base trip point<br>
 +
<br>
  
−
Baseline current of 1.05A / .35A per value = value of 3 in bits 4-7.<br><br>
+
Additional amperage allowance when motor is on .7A / .35A per value = value of 2 in CV112<br><br>
  
−
Additional amperage allowance when motor is on .7A / .35A per value = value of 2 in bits 0-3.<br><br>
+
Additionally the harder the motor is working the higher the trip point will get set by decoder code internally, but you don't need to worry about that as its not user programmable. If you find false motor shorts and certain speeds but not others please let TCS know what speeds it falsely trips at
−
 
 
−
So set a value of "3" into the calculator first, this gives the baseline current, then enter "2" for the motor draw allowance (shifts the first value over 4 bits). The calculator should now say "32" but remember we set it "hex" mode and our DCC command stations work in decimal only, so set the radio button back to Decimal, the display will now say "50". 50 is the value to program into CV112 to get a baseline limit of 1.05amps and an additional .7A when the motor is on. Additionally the harder the motor is working the higher the trip point will get set by decoder code internally, but you don't need to worry about that.
 

Latest revision as of 16:25, 20 September 2018

NMRA CV# 112
  • Beta test* Short circuit trip point Motor offset
Range of Values0-15
Default Value2

NMRA CV 112 - Beta testing short circuit trip point motor offset

This CV is temporarily used for beta testing. Only mess with this CV if you find the decoder talking to you and saying there is a motor or light short circuit when there isn't actually one. TCS allowed the trip point to be programmable by beta testers because we are assuming not all locomotives act alike and will need customizing. Once we get feedback from the Beta testers we will modify the default values, thanks for helping us figure out the best values!
CV112 controls how much current is added onto the base trip point in Short Circuit Trip Point Base CV when the motor is running. Each value adds .35 Amps to the trip point, the value can go up to 15. giving a total range of 0 Amps to 5.25 Amps.

Example: .7 amps when the motor is on in addition to the base trip point

Additional amperage allowance when motor is on .7A / .35A per value = value of 2 in CV112

Additionally the harder the motor is working the higher the trip point will get set by decoder code internally, but you don't need to worry about that as its not user programmable. If you find false motor shorts and certain speeds but not others please let TCS know what speeds it falsely trips at

Retrieved from "http://staging.tcsdcc.com/index.php?title=Diesel_Version_5:CV_112&oldid=1040"