Akytec SMI2 Посібник користувача - Сторінка 6

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5.5

In this mode the device works within the factory settings, whereby the parameters configured

by the user are saved and not overwritten. This function can be useful if the device must be

configured and its network parameters are unknown.

To activate this mode, press the RESET button for more than 2 s. The flashing word Fact is

displayed and the device accepts the factory settings (see Appendix D.1).

To disable the mode, the RESET button must be pressed again for more than 2 s or the

command APLY must be sent by the master. The flashing word Fact then fades out and the

device resumes the user parameters. The factory settings are effective as long as Fact is

displayed.

►

If the network parameters are queried in this mode, the values of the saved user

NOTICE

network parameters are returned, not the factory setting.

6 Operation

The operating mode is automatically enabled as soon as the device is supplied with power.

The device supports master and slave modes. The mode can be set in the parameter dEv.r

(see Table D3). The factory setting is 0 (slave).

6.1

In the slave mode the SMI2 receives the data from the master and processes it in

accordance with the operating parameters. The results are shown on the display.

6.2

To enable the master mode, the parameter dEv.r must be set to 1. To do this the "Factory

settings" mode must be temporarily activated (see 5.5).

In the master mode the SMI2 sends requests to the slave device in the set cycle (parameter

SLA.P). The following parameters must be configured:

–

The transmitted values are displayed in the same way in both modes in accordance with the

set operating parameters.

The master mode supports only the protocol Modbus RTU/ASCII

►

NOTICE

The device cannot be programmed in the master mode. To do this the "Factory

settings" mode must be temporarily activated (see 5.5).

6.3

The complete parameter list is provided in the Table D3.

The data type (Int, Word, Float, String, Image) for the data transmission is set in the

parameter dAtA.

For data types Int and Word the transmitted values are displayed with the set decimal point

position (parameter dP).

Table 6.1 Decimal point position

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Factory settings" mode

Slave mode

Master mode

SLA.A - Address of the slave in the network

SLA.r - Register number for the request

SLA.P - Query cycle with increment of 100 ms, standard value – 10 (= 1 s)

SLA.F - Modbus reading function (0x0003 or 0x0004)

Operating parameters

Parameter dP

Display

----

----.

---.-

--.--

-.---

Factor

-1

-2

-3