Schneider Electric SR2MAN01 Reset Initial Counter State input, Z1 RC1, Counting direction input

LD Language Elements

Reset Initial Counter State input:

Symbol of the Reset Initial Counter State Input coil:

RC-

When used as a coil in a control diagram, this element represents an input that resets the counting function to its initial state.

Energizing the coil has the following effect:

zReset the current count value to zero if the count type is TO (up-counting from the preset value),

zReset the current value to the preset value if the count type is FROM (down- counting from the preset value).

Example: Counter no. 1 reset to zero by pressing Z1 key.

Z1 RC1

Every time key Z1 is pressed, the counter starts from 0.

Counting direction input:

Symbol of the Counting Direction Input coil of a timer:

DC-

This input determines the counting direction according to its status. It:

zDowncounts if the coil is energized,

zUpcounts if the coil is not energized.

Note: By default, if this input is not wired, the automation function counts.

Example: Up/downcounts, depending on the status of smart relay input I2.

I2 DC1

If the I2 input is active, the automation function downcounts.

112 SR2MAN01 11/2007