ELK M1kp2 keypad showing Lost Comm

jumbodogs

Member
I am trying to reinstall my elk .. moved some stuff around. I am getting Lost comm. message on my M1KP2 keypad. I have read that this can be a wiring problem so I now have the keypad connected with 2' wire to the ELK. I am pretty sure its not the wire. I have the keypad set to address 2. When I run elkrp software and try to enroll it I see message showing missing or not working message. I was wondering if there was a way to factory reset my Elk. Hoping that will help fix it.
 
Since your keypad is powered you know your Red and Black wires are connected properly. Odds are your one or both of the data wires is open or you accidently reversed them. Other possibilities are you are going through a databus hub that has a similar issue. Lastly you may have an incorrect termination of the RS485 bus similar to someone else seems to have had recently when connecting an M1XSP. These things can easily happen to anyone and can be easy to overlook when trying to figure out what went wrong.

I would check things in the order I mentioned them.
 
I thought you only put jump on them if you daisy chain them and keypad is wired to the elk no hub. I am 100% positive wire is not backwards.
 
Check for proper RS-485 protocol, daisy chained data A and B and proper jumper termination at both the M1 and the last keypad. You can also take out a DMM and start metering the data lines for voltage.
 
I had a similar problem once with one of my keypads. Here is what I did.
1. Remove the keypad from the system
2. Go into RP, and do an enroll devices, it should remove it
3. Reboot the M1
4. Install the keypad
5. Go in to RP, and enroll devices, it hopefully should see it now
 
I had a similar problem once with one of my keypads. Here is what I did.
1. Remove the keypad from the system
2. Go into RP, and do an enroll devices, it should remove it
3. Reboot the M1
4. Install the keypad
5. Go in to RP, and enroll devices, it hopefully should see it now

Thanks to the forum search, this solved a problem I was having while bench-testing my new system!!

Because I was bench testing, I had two keypads hooked up and could easily prove the wiring was okay by swapping connections - Keypad 1 always worked, keypad 2 always showed lost comm.
 
nov0798 said:
I had a similar problem once with one of my keypads. Here is what I did.
1. Remove the keypad from the system
2. Go into RP, and do an enroll devices, it should remove it
3. Reboot the M1
4. Install the keypad
5. Go in to RP, and enroll devices, it hopefully should see it now
Boy, am I glad I checked this before digging into my wiring.  I just added a new keypad and after setting the address I got the lost comm.  Of course I started having doubts about what I had done, but checked here first and I'm sure it saved me many hours of frustration.  
 
I've got a similar issue, but it seems the keypad I am attempting to install and enroll is already enrolled to another panel.  On boot it comes up with "Elk M1 00001C2C" which does not match the serial number of my M1 Gold. Is there a way to factory-reset the keypad so that it forgets its old enrollment?  Any attempts to re-enroll this using Elk RP or even doing the enrollment from the first keypad are fruitless. I've even got this connected directly to the panel, so I know there's not a termination or cable issue. 
 
Thanks,
Erik
 
I don't believe the keypad knows anything about the panel that it is connected to.   Rather the enrollment process tells the M1 what it has connected to it.  The address of the M1 gets display after the keypad communicates with the M1.  I've moved keypads from one M1 to another without ever changing anything (other than the keypad address, if it needs to be something different).
 
Have you set the keypad's address to 1 using the keypad?  Once you've set the address to 1, it will enroll automatically when the M1 powers up. Keypads that are set to something other than address 1 need to be explicitly enrolled.
 
Well I'm puzzled why it comes up with the different M1 serial number on the display. I can confirm my Keypad #1 comes up with the serial number that matches my M1 control on bootup. I will try just setting the keypad address to 01 and temporarily remove the other keypad and see if it can talk.  Thanks!
 
It turns out I was wrong when I said a keypad doesn't know anything about the panel it was connected to. It does indeed remember the serial number of the last panel it was enrolled with, though I'm not sure it uses it for anything and just displays it for informational purposes. 
 
I tried an experiment today by connecting a spare keypad to just 12V power without a data connection.  When powered up, it displayed its address and the serial number of the last panel it was enrolled with.
 
So if your keypad isn't displaying the serial number of your panel, that suggests that it isn't enrolling properly, possibly due to a communications problem or an incorrect address. 
 
So I reloaded the firmware and that got the serial number to re-sync, the "Lost Comm" ended up being a termination problem after all, I had pulled the wrong jumper off the M1XSP that was in the middle of the daisy chain.  Everything is working now! Thanks for the help!
 
Back
Top