Datasheet

Leuze electronic MA 248i 55

TNT 35/7-24V

10.3.3 Detailed description of the bits (output byte 1)

Bit 0: Read-Acknowledge: R-ACK

This bit is only relevant for writing slave data in blocks (Collective mode), see chapter 11.1.2.

Bit 2: Send data from buffer: SFB

This bit is only relevant for writing slave data in blocks (Collective mode), see chapter 11.1.2.

Output data Description Addr. Data

type

Value range Default

R-ACK

Read-Acknowledge

(read confirmation)

Toggle bit: Indicates to the fieldbus gateway that the "old"

data has been processed and that new data can be

received. At the end of a read cycle, this bit must be toggled

in order to be able to receive the next data set. This toggle

bit is switched by the master after valid received data has

been read out of the input bytes and the next datablock can

be requested. If the gateway detects a signal change in the

R-ACK bit, the next bytes are automatically written from the

receive buffer to the input data words and the BLR bit tog-

gled. Further toggling erases the memory (to 00h).

1.0 Bit

0->1 or

1->0: Successfully

written & ready for

the next transmis-

sion

Output data Description Addr. Data

type

Value range Default

SFB

Send data from buffer

(send data from the gateway transmit buffer to the RS 232)

Toggle bit: changing this bit causes all data which was copied

to the transmit buffer of the fieldbus gateway via the CTB bit

to be transmitted to the RS 232 interface or the connected

Leuze device.

1.2 Bit

0->1: Data to

RS 232

1->0: Data to

RS 232