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Wyara
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Recent content by Wyara
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ABB Inverter(slave) + MAX485 + Arduino(master) : 0xE0 (ModbusMaster invalid response slave ID exception)
Hello, when there is only one slave on the modbus network it is not necessary to activate the termination. It's good that you show what error is appearing in the IDE in arduino when loading the code. The ModbusMaster library foresees some situations and returns an error when the connection with...
Wyara
Post #54
Jun 1, 2021
Forum:
Modbus
ABB Inverter(slave) + MAX485 + Arduino(master) : 0xE0 (ModbusMaster invalid response slave ID exception)
Hello. Please explain what problem you are having? The max 485 converter module didn't work for me, I just used the max485 integrated circuit. 1- Remember to configure the control pins (DE and RE) in the ModbusMaster library; 2- Confirm that the baud rate, parity and slave ID are correct...
Wyara
Post #53
Jun 1, 2021
Forum:
Modbus
ABB Inverter(slave) + MAX485 + Arduino(master) : 0xE0 (ModbusMaster invalid response slave ID exception)
Hello. Sorry, but I connected all GND: GND ARDUINO --- GND MAX485 ---- GND INVERTER
Wyara
Post #49
Jan 5, 2021
Forum:
Modbus
ABB Inverter(slave) + MAX485 + Arduino(master) : 0xE0 (ModbusMaster invalid response slave ID exception)
The MAX485 CI has 8 pins. I connected them to the Arduino as follows: VCC --- 5V ARDUINO GND --- GND ARDUINO A ---- A (D + INVERTER) B --- B (D- INVERTER) RI ---- RX1 ARDUINO DI --- TX1 ARDUINO RE --- PIN 2 ARDUINO DE --- PIN 3 ARDUINO THE CODE I USED IS BASED ON THE EXAMPLE OF THE MODBUS...
Wyara
Post #46
Jan 5, 2021
Forum:
Modbus
ABB Inverter(slave) + MAX485 + Arduino(master) : 0xE0 (ModbusMaster invalid response slave ID exception)
Hi, Sorry for the delay. I made the connection between the inverter and the Arduino with a MAX485 integrated circuit (figure). I didn't modify the code. I think one of the resistors in the module I used before was preventing the signal from reaching the arduino. Thank you for your help!
Wyara
Post #45
Jan 5, 2021
Forum:
Modbus
ABB Inverter(slave) + MAX485 + Arduino(master) : 0xE0 (ModbusMaster invalid response slave ID exception)
Hi. I used only the MAX485 with the 10k resistor as you suggested, I had no results. Then just take the CI and connect it to the inverter (without polarization and termination resistors) and I managed to establish the communication (Fig 1). This for 1 inverter. I have to put 3 inverters in an...
Wyara
Post #43
Dec 21, 2020
Forum:
Modbus
ABB Inverter(slave) + MAX485 + Arduino(master) : 0xE0 (ModbusMaster invalid response slave ID exception)
Thank you for responding! After removing R7, I still get error E2 (timeout error). Sorry, I also don't really understand what happened when connecting the resistor terminals, but what appeared in the serial was what I expected to get (figure 1). To use only the MAX485 CI I need to put only...
Wyara
Post #41
Dec 16, 2020
Forum:
Modbus
ABB Inverter(slave) + MAX485 + Arduino(master) : 0xE0 (ModbusMaster invalid response slave ID exception)
Sorry. I will punctuate my steps to be more detailed: 1- I removed the 120ohm resistor from the RS485 / TTL converter module and kept the S1 and S2 switches OFF. Then I tested with the same code and connections with Arduino A in D +, B in D- and GND in GND. There was no success. 2- I used...
Wyara
Post #39
Dec 16, 2020
Forum:
Modbus
ABB Inverter(slave) + MAX485 + Arduino(master) : 0xE0 (ModbusMaster invalid response slave ID exception)
Hello. Thanks for responding! I removed the 120 ohm resistor from the RS485 / TTL converter and it didn't work. So I took a second module and connected the resistor terminals so the current would pass through a new path. This worked in a few moments but then I lost the connection for good. This...
Wyara
Post #37
Dec 16, 2020
Forum:
Modbus
ABB Inverter(slave) + MAX485 + Arduino(master) : 0xE0 (ModbusMaster invalid response slave ID exception)
Hello, thanks for replying! I still haven't gotten feedback from ABB support but I ran some tests. So I don't know where the keys S1 and S2 are currently in. For testing, I used the second option you indicated and inserted 470 ohm resistors between VCC and A and between GND and B. It didn't...
Wyara
Post #35
Dec 15, 2020
Forum:
Modbus
ABB Inverter(slave) + MAX485 + Arduino(master) : 0xE0 (ModbusMaster invalid response slave ID exception)
Thank you for responding! Yes, the RS485 network is short in length as it is only for study. So there is no need to use terminating resistors in this case, okay? However, in the future I intend to connect another 5 inverters to the RS485 network. All the inverters are close and I think the...
Wyara
Post #32
Dec 9, 2020
Forum:
Modbus
ABB Inverter(slave) + MAX485 + Arduino(master) : 0xE0 (ModbusMaster invalid response slave ID exception)
I asked ABB support
Wyara
Post #30
Dec 7, 2020
Forum:
Modbus
ABB Inverter(slave) + MAX485 + Arduino(master) : 0xE0 (ModbusMaster invalid response slave ID exception)
Thanks for the reply. I find it strange that even without the terminating resistor the communication works with the USB / RS485 converter, but not with the MAX485
Wyara
Post #29
Dec 7, 2020
Forum:
Modbus
ABB Inverter(slave) + MAX485 + Arduino(master) : 0xE0 (ModbusMaster invalid response slave ID exception)
I asked for more explanations to the support as the manual is not evident. I hope you respond quickly
Wyara
Post #27
Dec 7, 2020
Forum:
Modbus
ABB Inverter(slave) + MAX485 + Arduino(master) : 0xE0 (ModbusMaster invalid response slave ID exception)
Sorry, I still don't understand ... the resistor activated by switch S1 in the inverter replaces the 120 ohm resistor connected to the Fieldbus controller (in the image, 64 in the manual). OK?
Wyara
Post #25
Dec 7, 2020
Forum:
Modbus
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