Schneider Electric SR2MAN01 user manual Normally open mode, Normally closed mode

LD Language Elements

Use as a Contact The contact associated with the Message function block indicates whether the function block is activated.

It may be used as many times as necessary as many times as necessary in the program. It may be used according to 2 modes: normally open or normally closed, described below.

Normally open mode:

Symbol of the normally open contact associated with a Message function block:

S-

The contact is conducting when the function block is activated.

Normally closed mode:

Symbol of the normally closed contact associated with a Message function block:

s-

The contact is conducting as long as the function block is not activated.

Example: Lighting-up of a LED connected to the Message No.1 function block output

S1 [ Q1

Modifying the Mode of a Coil or a Contact

When function block no. 1 is activated, the associated alarm message is sent and the LED lights up, otherwise it is off.

To modify the operating mode of a coil or a contact from the front panel of the smart relay (the programming window displayed on screen), simply:

zPosition the cursor on the symbol representing the coil mode or on the letter of the contact,

zProceed as described in the paragraph Modifying an element,, p. 44, to scroll through the possible modes for a coil or contact types possible (S for normally open contact, s for a normally closed contact).

Configuration from the Front Panel

Initialization

The Message function block cannot be configured from the front panel of the smart relay. This function must be configured from the programming software.

See on-line help of the programming software for more information on configuration.

Status of contacts on program initialization:

zThe normally open mode (direct state) is inactive,

zThe normally closed mode (inverse state) is active.

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