User manual

ManualsBrandsEA ELEKTRO-AUTOMATIK ManualsPower Supplies & Mains AdaptersEA-IF-A1 Analogue-Interface

- set_mode.vi

Sets the device mode regarding external control and standby

of the device’s output/input. There are two bits, „Standby“

and „Remote“. Standby switches the power output (or input)

of the device on or off. „Remote“ sets the device into remote

mode. The remote mode is required to control the device,

i.e. to set values or transfer data. Without the remote mode

activated the device can only be requested to send actual

values or status data.

The remote mode can only be activated if the device „allows“

it. This depends on the current mode it is in. The local mode

or another, special state or operation mode the device may

inhibit the activation.

- wr_set_values.vi

Writes the set values for U/I/P/R, according to the device type

and if remote mode is enabled. It does not send and set all

four values at once, it sends every value with its own object. If

a set value isn’t given or does not change, the corresponding

object is not sent. The input values are automatically limited

to the device properties. Too high values are set down to the

nominal value of the device. This VI sends simple message

and thus no answer is generated.

- actual_values.vi

Requests the actual values for U, I and P. These are ans-

wered all at once, so it’s very fast. Those values always lie

within the limits of the device and should be identical to the

values displayed on the device itself.

LabView support

8.1.1 Short info Communication VIs

The communication VIs serve as a sort of drivers for the

various bys systems, respectively interface types. These VIs

are the basis of the standard VIs. Without the communicati-

on running in the background no device can be addressed.

Hence you must use the communication VIs and start them

before any standard VI is used. Every type of interface uses

its own VI. This is just an overview about the communication

VIs, detailed information about every VI can be found in the

user instruction manual of the VI set.

- CAN.vi

Read/write communication objects with the CAN protocol

with card IF-C1.

- RS232.vi

Read/write communication objects over RS232 (serial COM

port) with card IF-R1.

- USB.vi

Read/write communication objects over USB with card IF-

U1.

- Communication_layer.vi

Core VI of the communication, uses the other three VIs

alternatively, single or combined.

With the VIs „RS232“ and „USB“ you can control up to 29

further devices if the device, which is connected to the PC,

is configured as gateway to the CAN bus (see „4.3 CAN card

IF-C1“). The gateway feature is only recommended with low

bus traffic. The direct communication with the CAN bus from

a master device (PC) is much more efficient and faster. This

but requires an extra CAN master card in the PC.

8.1.2 Short info Standard VIs

The standard VIs are the most used VIs and are adapted to

every different type of device to suit all of its features. You

can control and configure nearly any feature of the particular

device. You can use (place) them as often as you want, but it

is only allowed to run multiple VIs at once if they all address

a different device.

These VIs require the communication VIs to be set up and

running.

This is just an overview about the communication VIs, de-

tailed information about every VI can be found in the user

instruction manual of the VI set.

- init.vi

It is run once at the start of the whole application, but after the

communication VIs (which it requires to run), and initialises

the device which can be „found“. It reads out all necessary

data that is required for the whole system to work correctly

and handles them over to the other VIs.