beautypg.com

Auto–transmit commands – sg, sn, sw – Flintec LDU 69.1 User Manual

Page 23

background image

LDU 69.1 Technisches Handbuch, Rev. 12 January 2011

Page 23 of 28

8.8. Auto–transmit Commands – SG, SN, SW

The following commands allow the gross weight or net weight values to be continuously sent. Continuous
transmission start as soon as the relevant command has been issued and finishes when any other valid
command is accepted by the LDU 69.1. The data output rate will depend on the baud rate being used e.g. with
a baud rate of 9 600, approximately 100 values per second can be transmitted.

Note:

The SG, SN and SW commands will only work if the LDU 69.1 has been set to full duplex [DX=1].

The continuous transmission of either the gross or net values will stop when another valid command is
received.

8.8.1. SG Send Gross Value continuously

Master (PC / SPS) sends

Slave (LDU XX.X) responds

Meaning

SG

G+01.100

Gross value: 1,100 d

8.8.2. SN

Send Net Value continuously

Master (PC / SPS) sends

Slave (LDU XX.X) responds

Meaning

SN

N+01.000

Net value: 1,000 d

8.8.3. SW Send Data String “Net, Gross and Status“ continuously

Master (PC / SPS) sends

Slave (LDU XX.X) responds

Meaning

SW

W+000100+0011005109

(example)

Net value: +000100 d (no decimal point)

Gross value: +001100 d (no decimal point)

Status bit 1: 5 (not used)

Status bit 2: 1 (Hex)

Check sum: 09 (Hex)

The status bits 1 and 2 are defined as follows:

Status

Value = 1

Value = 2

Value = 4

Value = 8

Status bit 1 Not used

Not used

Not used

Not used

Status bit 2 Signal stable

Set zero performed

Tare active

Not used

The check sum is the reciprocal value of the sum of all ASCII values within the data string without the check
sum itself.