Auto–transmit commands – sg, sn, sw – Flintec LDU 69.1 User Manual
Page 23
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.