Flintec LDU 78.1 - Manual (Page 31)

LDU 78.1 Technical Manual, Rev. 12 May 2011 Page 31 of 36
8.13. Re-Trigger Commands – RW, TT, TS, DT, TW, TI, HT
Note:
All changes to the re-trigger commands have to be stored in the EEPROM using the WP command. See
chapter 8.11
8.13.1. RW Trigger Window for Re-Trigger Function
This command defines a trigger window in unit d (digits) around the current cycle average value. If the signal
leaves this window even for one sample, then the averaging over the time period TT will be started again.
For using the automatic re-trigger function, it is required to define a short-time averaging period (command DT,
see below) before you can use this function.
Default value: RW = 65535 d.
Master (PC / SPS) sends Slave (LDU XX.X) responds Meaning
RW  R+65535 Request: RW = 65535 d
RW 500
 OK Setup: RW = 500 d
8.13.2. TT Averaging Time for Re-trigger Function
This command defines an averaging time for calculating the cycle average value. If this time period has been
elapsed, the measurement cycle will be finished at the latest.
The setting TT = 0 disables the re-trigger function. Default setting: TT = 65535 ms.
Master (PC / SPS) sends Slave (LDU XX.X) responds Meaning
TT
 T+65535 Request: TT = 65535 ms
TT 300  OK Setup: TT = 300 ms
8.13.3. TS Stop Value for Re-trigger Function
This command defines a stop criteria in unit d (digits) for the re-trigger function. If the signal falls more than this
value TS below the cyclic average value, then the measurement cycle will be finished.
Default setting: TS = 0 d.
Master (PC / SPS) sends Slave (LDU XX.X) responds Meaning
TS  T+00000 Request: TS = 0 d
TS 480
 OK Setup: TS = 480 d
8.13.4. DT Short-time Averaging Period
This command defines a time period to calculate short-time averages. If the short-time average falls outside the
trigger window, then the measurement will be started again.
Master (PC / SPS) sends Slave (LDU XX.X) responds Meaning
DT  T+00000 Request: DT = 0 ms
DT 50
 OK Setup: DT = 50 ms
8.13.5. TW Window for Automatic Taring
This command defines an ampliude window for the automatic taring. The setting TW = 100 means, that the
system calculates a new tare value, if the averaged net value of the empty scale falls within 100 digits of the net
zero point. The new tare value will be averaged over the time period TI (see below). If the averaged tare value
falls outside this window, then the tare value will not be updated.
Default setting: TW = 0 [= automatic taring disabled]
Master (PC / SPS) sends Slave (LDU XX.X) responds Meaning
TW
 T+00000 Request: TW = 0 d
TW 100  OK Setup: TW = 100 d