SPK107 with Altivar. Right drow Modbus RTU

Once the task was set to create application software for the panel of the company "Aries" SPK107. Pretty long fiddled. All the matter is that separately these devices work well, and at connection has faced problems. They refused to work together in a bunch. Carefully reading the documentation from Altivar found necessary not only a resistor at the two ends of the line, but also a capacitor.

Attention!!! Having set all this in exactly - it worked)

Russian version

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