Flintec LDU 69.1 - Manual (Page 21)

LDU 69.1 Technisches Handbuch, Rev. 12 January 2011 Page 21 of 28
8.6. Output Commands – GG, GN, GT, GS, GW
The following commands “Get” the gross, net, tare and ADC sample values from the LDU 69.1.
8.6.1. GG Get Gross Value
Master (PC / SPS) sends Slave (LDU XX.X) responds Meaning
GG  G+01.100 Gross value: 1.100 d
8.6.2. GN Get Net Value
Master (PC / SPS) sends Slave (LDU XX.X) responds Meaning
GN  N+01.000 Net value: 1.000 d
8.6.3. GT Get Tare Value
Master (PC / SPS) sends Slave (LDU XX.X) responds Meaning
GT  T+00.100 Tare value: 0,100 d
8.6.4. GS Get ADC Sample Value
This command gets the actual Analogue to Digital Converter (ADC) value. This can be useful during
development or when calibrating to see how much of the ADC range is being used.
Master (PC / SPS) sends Slave (LDU XX.X) responds Meaning
GS  S+125785 ADC sample value = 125785 d
For service purposes it may be helpful to note the GS values for the “no-load” or “zero” output and when the
“calibration load” is applied.
8.6.5. GW Get Data String “Net, Gross and Status“
Master (PC / SPS) sends Slave (LDU XX.X) responds Meaning
GW

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.