Moxa Technologies MGate MB3000 Modbus Manuel d'utilisateur télécharger pdf (Page 33)

MGate 4101-MB-PBS UM Configuration

4-19

IO Map

The IO Map is a mechanism which is applied when data from different networks are exchanged via the

gateway’s internal memory, so you must define a memory map in the gateway before starting data exchange.

Moreover, two networks access the same memory block in a gateway.

Therefore, gateway internal memory is divided into two blocks. The input memory address starts from 0x00000

and the out memory starts from 0x40000. The following picture demonstrates the memory structure. Each

page contains 244 bytes.

Before data exchange, you first need to map Modbus requests to the I/O module. In troubleshooting,

understanding the relationships between the I/O modules and memory is a good way to exclude wrong IO

configuration issues. The IO Map function provides a way to check the internal memory address. You can open

the IO map dialog with the IO Map button.

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Moxa Technologies MGate MB3000 Modbus Manuel d'utilisateur Page 33