[Joze]

I think the connectors are OK. The protectos is suppose to have “BNC”, which is the same that radiomodem uses.

The “device” side is where the radiomode is connected – BNC male on protector and BNC female on radiomodem. While on the “line” side its the opposite – BNC female on the protector and BNC male on the antenna cable.

So it seems to be ok ?

[Joze]

Thank you. One more question, this should also work, right ?

It would be placed before the radiomodem. At 169MHz loss is still quite low as shown in the graph in the above document.

[Joze]

Thank you, we already received the cable.Additional question regarding over voltage protection that you recommend with the antenna, would the combination of 40m cable and the surge protection lead to excessive loss or it shouldn’t be a problem ?

[Joze]

Regarding the 155-175MHz Yagi 3-el. antenna pole mount, we are in a situation where we would need 40m long cable to the antenna, would this work or is 10m the maximum allowed length ? If it is ok, do you happen to stock antenna cable that long ?

[Joze]

Ok, we figured it out, the analog sensor wasn’t correctly wired: + goes to 24VDC power supply, while – goes to the analog input e.g. AI01, then the resistor is placed between AI01 and AI02 and then you bridge AI02 and AGnD – this is for current differential connection. Works now nicely.

[Joze]

Oh, you are right, our HMI panel has Ethernet as well so a Modbus TCP/IP solution is definetely a option, thank you for your suggestion! 

I looked a bit into the thing and I think that most portable solution will be using OSCAT ModbusTCP function blocks. Eaton has some function blocks for Modbus TCP, but I’m not sure if it can be used on SlimLine PLC. Maybe you can try using it on the SlimLine ?

I also had a quick look into your solution (PHPToModbus.pro program), doesn’t look that hard to implement, but that then are basicaly ModbusRTU packets sent via TCP and not proper ModbusTCP ? As far as I know there are some differences between those two types.

[Joze]

Thank you for your answer and for suggesting the interesting solution with the “TCPServer” library. Do we specifically need the SlimeLine MPS053 or we can use MPS046 as well ?

The MPS053 is very limited with storage, it has only half the FlashEPROM user program storage (48kBytes vs. 96kBytes), how big projects can this run ?

We are also considering getting the Codesys SlimLine version since we are more experienced using Codesys, does it also support TCPServer/TCPClient Function blocks ?

[Joze]

We decided that we will try your hardware and will make an order in the coming days, We just need to clarify a few things before. So here are the questions:

Do you recommend 1/4 Lambda, Yagi 3-elements or dipole antenna for communication through a 800m long forest (the one mentioned before) ?

We are using Eaton XV102 with Codesys as our master device and want to communicate with a remote PLC over a wireless connection. We are currently also using Eaton Easy821 PLC’s but they are limited to CAN communication and therefore we can’t use them with DL169 as it is limited to Modbus RS485 (communication XV102-DL169-Easy821 is not possible). So we need a replacement PLC and are looking at your SlimLine PLC’s with RS485. Now what we are wondering is, can a SlimLine PLC programmed in LogicLab be used as a Modbus RTU slave device ? So we can use the Eaton XV102 PLC as a Modbus master and the SlimLine PLC as a Modbus slave and so we can make a wireless Mobus communication between the XV and the SlimLine PLC over the DL169 (XV102DL169SlimLinePLC). Is that possible ?

ERE Wireless is offering IP66/68 certified Radiomodes, what are the prices compared to the regular DL169 ?

[Autore]

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