Moxa IOLOGIK E4200 User Manual download pdf (Page 89)

ioLogik Active Ethernet Modular User’s Manual Using Modbus/TCP

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The addressing of I/O image Map

Modular ioAdmin allocated the I/O channels by four groups.

1. DI: Modbus input coil map (read-only)

2. DO: Modbus coil map (readable/writable)

3. AI: Modbus input register map (read-only)

4. AO: Modbus holding register map (readable/writable)

And it also provides two ways to arrange I/O image Map. You can set the option in the Adaptor

Settings Tab.

1. Fixed mode (Default): Every slot has its own memory bank. It is easy way to understand, but

has lower efficiency due to large memory size.

2. Dynamic mode: Modular ioAdmin will try to put the same type input/output channels together

in order to reduce memory size and higher efficiency.

Note: You can easily find the Modbus address directly with the Modular ioAdmin utility.

After clicking the I/O Configuration tab, select the I/O modules, and then click the “Modbus

Address” tab.

Note that you can right click the selected ioLogik E4200 in the Modular ioAdmin utility to export

the Modbus address table to a CSV (Microsoft Excell) file.

Fixed mode (default mode):

According to each I/O module’s sequence on the I/O system, Modular ioAdmin allocates 512

memory address sizes. In other words, slot 0 will start from 0x0000 to 0x01FF and slot 1 will start

from 0x0200 to 0x03FF. For example, if M-3402 is in the position 5 (6th slot), then

Channel-0: (0x0200 * 5 + 0) = 0x0A00 (input register map)

Channel-1: (0x0200 * 5 + 1) = 0x0A01 (input register map)

Channel-2: (0x0200 * 5 + 2) = 0x0A02 (input register map)

Channel-3: (0x0200 * 5 + 3) = 0x0A03 (input register map)

If M-4202 is in the position 0 (1st slot), then

Channel-0: (0x0200 * 0 + 0) = 0x0000 (holding register map)

Channel-1: (0x0200 * 0 + 1) = 0x0001 (holding register map)

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Moxa IOLOGIK E4200 User Manual Page 89