Modbus Device Troubleshooting - ABB Ekip E-Hub Manual

14 - Modbus device troubleshooting

Modbus TCP This table describes how to solve issues with Modbus TCP device.
device
troubleshooting
Issue
No Modbus TCP
device can be
discovered in Ekip
Connect 3
Ethernet LED is not
blinking
Modbus RTU
This table describes how to solve issues with Modbus RTU device.
device
troubleshooting
Issue
No Modbus RTU
device can be
discovered on the
Ekip E-Hub RS-485
ports
Some Modbus RTU
devices cannot be
discovered
2TFP900034A1001 ECN000087106 Rev. A
Possible Solution
Check that following IP address are in the same LAN:
Ekip E-Hub LAN2's IP address

PC's IP address which run the Ekip Connect 3

Modbus TCP devices' IP address

Check that the Modbus TCP device IP is inputted correctly in Ekip
Connect 3 manual discovery settings.
Check that the Ethernet cable is connected.
Possible Solution
Check that Gateway function is enabled. Changes of device
configuration will be validated after Ekip E-Hub reboot.
Check Ekip E-Hub communication interface defaulted setting, RS-485
interface1 and interface 2 Baud rate are 19200 bit/s, physical protocol
are E81.
Check the wiring integrity and that the RX/TX are wired to correct
terminals.
Check that the slave address is inputted correctly in Ekip Connect 3
manual setting.
Check that the missing device is wired to correct RS-485 port:
Modbus RS-485 devices with slave address between 2 and 127 must be
connected to RS-485 interface 1.
Modbus RS-485 devices with slave address between 128 and 247 must
be connected to RS-485 interface 2.
Check that two devices do not have the same slave address.
Check that the wiring of the missing devices is correct.
Check that the setting to the missing device consistent with the Ekip E-
Hub communication setting (Baud rate, physical protocol).
IMPORTANT: The tasks are specifically indicated that can be performed by
trained persons in an electrical environment. Please follow the
section 2.
ABB accepts no liability for damage to property or personal injury due to failure
to comply with the instructions contained in this document.
Safety items in
Ekip E-Hub | 37