Akytec MU110-8I Manuale d'uso - Pagina 11

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Operation

The module is controlled by the Master device in a RS485 network. The addresses from 1

to 247 can be used. The address 0 is reserved for broadcasting.

The following Modbus functions are supported:

–

03 (0x03) Read Holding Registers

–

04 (0x04) Read Input Registers

–

16 (0x10) Preset Multiple Registers

The register addresses is given in Table 6.2.

The output status according to the output value is given in Table 6.1.

Table 6.1 Output status

Configuration

0...1

* Note:

The configuration program uses internal communication protocol instead of Modbus pro-

tocol. For this reason the ranges of output value during configuration and in Modbus

command can differ. For example, in order to activate output AO1 during the functional

test, the output value should be set to 1, but in Modbus command the output value 1000

should be recorded in the register 0000.

6.1

Output functional test

In order to check the functioning of the device outputs procced as follows:

–

Connect the module to the computer USB-port via USB/RS485 adapter

–

Connect a voltmeter and a resistor box as shown in Fig. 6.1

–

Start the configuration program "M110 Configurator"

–

If connection with the module has not been established automatically, network

parameters of the configuration program should be changed

–

Select the menu path "Device -> I/O Status..." to open "Output status" window

–

Set individual outputs to 0 or 1 to check their functionality

–

The functional test is successful, if the voltage is within the range between

10±0.05 V at 20 mA and 2±0.05 V at 4 mA

–

Contact the Technical Support of akYtec GmbH in case of any deviations.

akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany Tel.: +49 (0) 511 16 59 672-0 · www.akytec.de

Output value *

Modbus Command

1000

0...1000

Fig. 6.1 Functional Test

Output Status

4 mA

20 mA

4–20 mA