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How to communicate with the Series 4000/7000 Group 5 controller via RS485?

Using ASCO 5170 (72EE2) QEM

ASCO 5170 QEM by default is configured for Ethernet communication. It should be configured first for Serial communication.

Here are the steps:
1. Open QEM.
2. Move jumper J203 to the left. This will activate Serial mode.
3. Move jumper J207 to the left. This will activate the RS-485 port.

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After activating the Serial mode and RS-485 port. The following should be set accordingly:
1. Termination Resistor
2. RS-458 Connection
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The next steps are to be configured on the Group 5 controller.
1. On Group 5 controller, go to Main Menu ➡ Settings ➡ General ➡ Serial Communication.
2. Select baud rate with MBUS prefix.
3. Enter the appropriate device address.
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Refer to the Modus Register Map document (381339-221) for Group 5 Holding Register addresses.

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