I have a question regarding a MXL panel. We are currently in the process of adding some devices for an elevator modernization project. I had a subcontractor out for the programming portion of this project since we are not Siemens distributors. I am no expert with these panels, but I was told by the tech I can only add devices to loops 1 and 2. Is this accurate? I can’t just tie into any available SLC? I appreciate any input, I just want to have a bit more knowledge prior to figuring out the best way to move forward with my sub. Thanks!
Adding devices to an SLC depends on the number of devices on the loop already. The MXL (or MXL-IQ) can only have 60 devices per loop. Loop 1 & 2 reside on the MMB or SMB.
The software is proprietary, so you will need to either use Siemens or the distributor who installed the system as the software sets a ‘license key’ so that the panel will only communicate with the key holder’s software. If you need to change the license, you will need to submit a ‘password of the day’ letter to Siemens which release the original programmer from any liability and transfers it to the new programmer.
Since each loop is 60 devices max, there’s probably only spare capacity on loops 1 & 2.
There’s no programming limitations though requiring loops 1 & 2 to have the elevator controls, they can be on any SLC with the capacity for them. You could theoretically move devices off the nearest loop onto 1 or 2 to free up space, but as you can imagine, that gets messy fast.
Thanks for the input. By the sounds of things, I’ll be running a considerable amount of wire to make this happen. I will also be speaking with my customer regarding system limitations moving forward. I like the idea of moving devices, but in this instance I am unable. The existing loops have a couple open spots, but not enough to get me through. He also told me if we use them, only old devices would work. Is that correct? Thanks again !
I’m not sure what they mean by only old devices. Could be a few things.
Those panels can have ALD loops and XLD loops, XLD being XL3 (an older panel) devices from which could be migrated into an MXL using an XLD card. Basically an easy way to upgrade the head end and keep the old field devices. The ALD loop is the MXL’s main line. you can’t mix and match devices on ALD and XLD loops, each have their own specific devices.
MXL’s were given an end of life a few years ago though (meaning no new installations allowed, just upgrades and maintenance), so any device could be considered old. It’s just that ALD devices are old, XLD are super old.
Old FA guy is correct. However you can add many devices to the MXL/IQ if the MMB/SMB ALD loops are full. You can expand by adding another ALD-2I card on a MOM-4. This will give you 120 more device addresses. It would help if you can send what type of system you have. MXL/MXLV/MXL-IQ.
You can VIEW the current file in the LIST menu. Push enter/list/scroll 7 spaces to the left, at SW VER push enter. This will give you the current versions of the installed Firmware, CSGM (Software), File name, Revision, & date it was last loaded. Having the company who last loaded this is your best bet. They are familiar with the system & programming. If they do not have a copy, They can extract the .mxl file from the MMB, decompile it, & give you what you need. If you need addresses, messages, use LIST, Messages, enter 001-001 enter, next, or enter, this will LIST all messages on Loop 1. Do the same for all other loops. The MXL is being phased out, but parts will be around for this for a VERY long time. MMB-3 & CSGM have been updated for porting over to XLS systems with an MLC card installed.