CM200 doesn't transmit from Zetron RTU

droatcap · Post by **droatcap** » Tue Sep 12, 2006 12:09 pm

We have used the M1225 in the past for our SCADA system. Now that it is discontinued our provider sold us some CM200's. After a lot of troubleshooting we determined that the CM200 receives commands from the Scada controller but will not transmit when told to do so by the RTU. I know the RTU is good because we put an old 1225 in and it worked fine. I do not know anything about programming radios but I would guess this should be a simple fix for someone who does. One of the radios is with an authorized repair shop but they haven't come up with anything yet. Does anyone have any suggestions or know of any compatibility issues with the radio. Could pinouts have changed in these models?

Post by **wavetar** » Tue Sep 12, 2006 1:49 pm

I don't have the software loaded here at home to confirm, but I believe the CM200 has pin 3 as programmable, whereas the 1225 was hardwired for pin 3 as PTT. It may be as simple as programming the CM200 to have pin 3 as PTT, active low.

Todd

MotoMax300 · Post by **MotoMax300** » Tue Sep 12, 2006 1:51 pm

Todd's got it . Thats what our local FD had to do.

ve3nsv · Post by **ve3nsv** » Tue Sep 12, 2006 5:08 pm

I just installed a foot PTT switch and visor mic into a crane today and didn't have reprogram the radio at all so I'm guessing it defaults to PTT on Pin 3.

Still worth checking the accessory pin configuration, hopefully I'm wrong.

MotoMax300 · Post by **MotoMax300** » Tue Sep 12, 2006 5:20 pm

I checked the soft,

Pin Pin Configuration Direction Debounce Active Level

3 External Mic PTT Input Enabled Low

Thats the default....

Choices available are:

Unassigned
Data PTT
External Mic PTT

ALL INPUT ONLY!!

droatcap · Post by **droatcap** » Wed Sep 13, 2006 6:54 am

I talked to the radio tech today and tried to explain to him what you guys are saying. It is very difficult for a non-tech such as myself to be convincing. Anyway I asked him about pin 3 and in the CM200 software or manual, he was unable to find anything about the 3 options for PTT. All he could find was Enable High or Enable Low. What you are saying makes sense to me but how do I convince him he's missing something? He is sure it is set up to transmit any audio that hits pin 2. Could he have a version of the software that doesn't show him the Data PTT option? By the way. I'm amazed at the quick responses to this. Thanks for the help.

MotoMax300 · Post by **MotoMax300** » Wed Sep 13, 2006 8:35 am

Straight from the CPS/RSS Manual

Flat Tx Audio:

The external microphone is on the partially programmable Pin #5 of the Accessory Connector, and the audio is un-filtered.

Ext. Mic Audio:

The external microphone is on the partially programmable Pin #2 of the Accessory Connector, and the audio is filtered.

Ext Mic and Flat Tx Audio:

Both inputs are enabled simultaneously.

Post by **wavetar** » Wed Sep 13, 2006 11:51 am

droatcap wrote:I talked to the radio tech today and tried to explain to him what you guys are saying. It is very difficult for a non-tech such as myself to be convincing. Anyway I asked him about pin 3 and in the CM200 software or manual, he was unable to find anything about the 3 options for PTT. All he could find was Enable High or Enable Low. What you are saying makes sense to me but how do I convince him he's missing something? He is sure it is set up to transmit any audio that hits pin 2. Could he have a version of the software that doesn't show him the Data PTT option? By the way. I'm amazed at the quick responses to this. Thanks for the help.

He should see this screen below:

If Pin 3 is set for 'external mic PTT', and active 'low', then it's properly programmed, and I don't have an explanation for why it wouldn't be working in place of an M1225, because it certainly should be. Have the tech test the unit on the bench by grounding pin 3 & seeing if it keys up the radio.

I suppose another possibility is the RTU is seeing a level coming from one of the other programmable pins (such as COR), which is telling it the radio is receiving a signal, and to delay transmit until it goes away. I know the CM series only has approx 3.75volts on it's active 'high' pins, instead of approx 5 volts like every other 16-pin Motorola radio. Perhaps that's causing issues as well.

droatcap · Post by **droatcap** » Thu Sep 14, 2006 6:34 am

Thanks, this should help. My initial thinking appears to be wrong. I was assuming that the setting should be for Data Ptt instead of Mic. I'll pass this on to him. I checked the Zetron manual for COR settings and found the following:

Carrier Detect

JP1 A = 10kOhm pull down to ground on Carrier Detect input
B = 10kOhm pull up to +12 Vdc on Carrier Detect input

PTT

JP3 A = PTT completes the connection between P3 Pin 3 and Pin 4
B = PTT provides a ground o P3 Pin 3. (Pin 4 not used)

JP4 IN = PTT provides a +5 V pull-up on P3 Pin 3 when not engaged
OUT=PTT goes to open circuit on P3 Pin 3 when not engaged.

I don't know if this is applicable at all to my problem but it is beginning to seem that way to me. What do you think?

droatcap · Post by **droatcap** » Thu Sep 14, 2006 7:06 am

I touched pin 3 of the accessory cable to ground and this did not key up the radio. Does this mean anything? Keying the handheld mic does of course key up the radio.

MotoMax300 · Post by **MotoMax300** » Thu Sep 14, 2006 7:25 am

Then Pin 3 is configured wrong or not installed in the radio correctly. There is your problem.

Have a check of pin #3 under accessories in CPS, then go from there.

Bad pin in the accessorie cable? too lose? you did ground it to the rtu/radio's ground correct?

I'm thinking pin 3 is configured wrong.

droatcap · Post by **droatcap** » Thu Sep 14, 2006 11:43 am

I'm taking the radio to another tech tomorrow. I will keep you posted of any developments in this. It will be next week before I know anything.

HLA · Post by **HLA** » Fri Sep 15, 2006 2:41 pm

you know the cps has a drop down box that will let you choose certain devices like a rick for tx or rx or a phone patch. that box will configure your settings for you if there is a compatable one.

droatcap · Post by **droatcap** » Thu Sep 21, 2006 8:21 am

It's been a very trying week. As all of you suspected, pin 3 was not programmed to do anything. I am surprised the first radio shop we took these to had such a hard time with that. These other guys also did some programming on th CSQ Detect pin 8. I am unfortunately not completely certain this is working as in the process of swapping radios, we disabled our MTU and shut down all communications to the remote Scada sites. We plugged a backup computer with an old UltraC application in as well as the backup MTU and at least have some control. My common sense tells me the new radio could not have done this and it was some freak coincidence. The radio tech believes this as well, but I expect he would. Is it remotely possible to have a radio transmit in such a way as to disable the MTU? I first thought was we were overloading all communcations somehow so we of course disconnected the radio but to no avail.

Post by **wavetar** » Thu Sep 21, 2006 9:07 am

I wouldn't believe it was a fault of the radio, unless it either had the 16-pin connector plugged in upside down (unfortunately possible with the CM series if you try hard enough), or perhaps it's putting a voltage on pin 8 that the MTU has a problem with. Was the M1225 programmed to output anything on that pin as well?

Todd

droatcap · Post by **droatcap** » Thu Sep 21, 2006 11:40 am

I don't believe the connector was in wrong - this time. We did that a couple weeks ago. It speaks well of the internal fuse since that seemed to be the only damage. I can't say how pin 8 actually got programmed. The Zetron schematic mentions merely that it 'may need programming', and the techs did something. The only other thing they did was turn down the power level, I think from 40 watts to 25. We are going to try these radios again on the old system at an old site but it may not be until the first of next week. The maintenance guys don't want to jeopardize what is working now with the weekend coming up.

droatcap · Post by **droatcap** » Thu Sep 28, 2006 12:09 pm

Just wanted to update any of you who are following this. We tried the radios after getting pin 3 programmed and they still did not work. I grounded pin 3 and confirmed it would key up the radio. We were able to make everything work through the mic jack however. Ultimately we want all radios to use the accessory connector so back to the shop we went. The tech called today and said there is a programming block in the software for pin 5 that is found only after entering 'expert' mode???? He is confident that it will work now so once again I'll pick them up tomorrow and try them early next week.

droatcap · Post by **droatcap** » Mon Oct 02, 2006 2:21 pm

I picked up the radios and found them to be working, finally. It turns out that the programming on pin 5 did the trick. This was probably what MotoMax was trying to tell me from his post on Sept 13 but, not being radio fluent, I didn't understand it. So from the factory pin 3 is dead and pin 5 needs changed. Thanks again for all the help.

MotoMax300 · Post by **MotoMax300** » Mon Oct 02, 2006 2:37 pm

Thats what I meant, I shoulda been more explanative. Glad it worked.

droatcap · Post by **droatcap** » Tue Jul 07, 2015 5:15 am

This is carrying on from an old post. We have had to move on to new models specifically a CM300 and a CM200D. The original programming for the CM200 was put on both of these but they do not transmit or receive data at a known working site. Has the accessory pinout changed on these? Do pins 3 and 5 still do the same thing with the same programming options? Is pin 5 programming still hard to find (have to access Expert Mode under the View menu item)? You guys got me going many years ago. Hope you can help again.

CM200 doesn't transmit from Zetron RTU

CM200 doesn't transmit from Zetron RTU

Re: CM200 doesn't transmit from Zetron RTU