1. TRM200-H2 OWEN - 4680 rubles.
2. Pressure transducer PD100-DI10 Aries - 3420 rubles.
3. Network gateway PM210 OWEN - 4980 rubles.
4. External antenna, ANT-5 OWEN - 1072 rubles.
Work order:
1. We select a suitable tariff.
The instructions indicate that not all tariffs are suitable for modems and routers, and are designed to work in smartphones. In this task, the tariff from "Megafon" ("Minimum without overpayments") is used, which limits the ability to distribute traffic to devices. However, everything works.
2. We understand the connection diagrams.
The difficulty is that I found a lot of connection diagrams in the documentation. All of them did not answer a seemingly simple question: is an external power supply needed for a 4-20mA pressure sensor? I did not find any schemes with reference to the existing ones in TPM (11,12,13,14,15,16), I had to guess what was meant.
In fact, of course, an external 24V power supply is needed, otherwise it will not be possible to assemble a current loop for a 4-20mA device. It's good that I still had 50 Ohm resistors from the MB110-8A modules. Soldered them together. I noticed the inconsistency: in the diagram, the numbering of the terminals is "Input x-1, x2, x3", and according to the diagram in the module it is indicated that you need to jumper "16-15" and "11-12", but logic tells me that it is better not to do this ... Of course, it is bad that nowhere is it explicitly stated that an external power supply is needed for the 4-20mA circuits. In the scheme for using a passive 4-20mA sensor, "Uп" is indicated, but this is not quite what I would like to see in the documentation. It is not clearly stated that an external power supply is required, but it is REQUIRED!
As a result, the connection is made:
- + 24V must be connected to leg "1" of the pressure transducer;
- leg “2” from the pressure transducer must be connected to terminal 15 “TPM200-H2”;
- terminal 14 "ТРМ200-Н2" must be connected to the minus of the 24V power supply;
- between terminals 14 and 15, a soldered bridge of two precise 50 Ohm resistors is connected.
3. Connect TPM200 Aries to the software configurator.
You can set the parameters from the front panel, but this is rather inconvenient.
The configurator was installed and connected quickly, it was quite easy to create a connection through the AC4-M interface converter. I set the parameters of channel 1 to 4-20mA. I set the network address to 1, I did not change the rest of the parameters. I loaded it into the device and the values went. The sensor range is from 0 to 10mPa. It is clear that the megapascal cannot be blown out with lungs, but I should not be discouraged. The device began to record small changes in the pressure value, which means that the circuit is assembled correctly.
4. We output the device value to the OWEN OPC server.
Once the device started to show the value on the front panel, therefore, we test the data transfer from the device via the Modbus RTU protocol to the OWEN OPC server. Here difficulties arose, requiring perseverance when reading the documentation.
Firstly, the device itself does not respond until the RTU protocol is set from the buttons. By default, the OWEN protocol is installed and changes of these network parameters from the configurator are not available.
Secondly, the changes take effect only after a reboot, I came to this empirically.
Third, the number of stop bits must be 2 !!!
If you don't know all this in advance, then a few hours of dancing with a tambourine is guaranteed.
5. We configure the gateway PM210 Aries.
Since the data began to flow through the protocol, we proceed to configuring the PM210 gateway. The first thing that unpleasantly surprised me when I opened the lid was that parts fell out. This is the service button stem collapsed. Somehow, the mechanical fastening of this microswitch was not invented in the best way, but this is my subjective opinion. This gateway does not have its own configurator and is parameterized directly from the OWENCLOUD cloud. Reading the documentation, I found a discrepancy, since the number of stop bits: 1 for PM210 is not suitable for TPM200-H2, where this parameter is needed 2. So, we will reflash.
From proposals to the production association Aries:
1. Considering that there is always a built-in power supply inside the device, the lack of output of the + 24V terminals causes confusion. Why this has not been done is a mystery. As a result, the customer who bought the product has a need to purchase an additional power source. Despite the fact that there are only two measuring channels in TPM200, in my personal opinion, there should be power supply for pressure transducers there.
2. Schemes. It's hard for me to understand what the developer's goal was. There are several possible schemes in each device. Why not draw complete wiring diagrams for each application? Thermocouple, thermal resistance, pressure transducer. Make sure that the names of the terminals are clearly numbered and do not have to think out (x-1).
I would like to express my gratitude to the OWEN technical support team who respond on weekends, always to the point, politely and calmly..