Flintec LDU 68.2 - Manual (Page 20)

LDU 68.1 & 68.2 Technical Manual, Rev. 12 January 2010 Page 20 of 28
8.7. Auto–transmit Commands – SG, SN, SF, SW, SA
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 68.1. 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 68.1 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.
8.7.1. SG Send Gross Value continuously
Master (PC / SPS) sends Slave (LDU XX.X) responds Meaning
SG  G+01.100 Gross value: 1,100 d
8.7.2. SN Send Net Value continuously
Master (PC / SPS) sends Slave (LDU XX.X) responds Meaning
SN  N+01.000 Net value: 1,000 d
8.7.3. SF Send Filtered Value continuously (Display Mode only)
Master (PC / SPS) sends Slave (LDU XX.X) responds Meaning
SF  F+01.000 Filterted net value: 1,000 d
This command will start to auto-transmit the post-filtered net weight value, e.g. for a weight display. The filter
setup will be done with the command FF (see chapter 8.4.).
8.7.4. 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 Output 0 active Output 1 active
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.
8.7.5. SA Send Triggered Average Value automatically
Master (PC / SPS) sends Slave (LDU XX.X) responds Meaning
SA  A+01.100 Measurement value: 1,100 d
This command will start to auto-transmit the measurement value of the current trigger cycle. The trigger setup
commands are described in chapter 8.12.