Flintec LDU 68.2 - Manual (Page 16)

LDU 68.1 & 68.2 Technical Manual, Rev. 12 January 2010 Page 16 of 28
8.3. Motion Detection Commands – NR, NT
The motion detection facility provides a means of disabling certain functions whenever a condition of instability,
or “motion”, is detected. The “no-motion”, or “stable” condition is achieved whenever the signal is steady for the
period of time set by NT, during which it cannot fluctuate by more than NR increments.The stable condition
activates the relevant bit of responses to “Info Status” (IS).
Following functions are disabled if motion is detected: “Calibrate Zero” (CZ) “Calibrate Gain” (CG) “Set Zero”
(SZ) and “Set Tare” (ST). After such a command the system returns an error (“ERR“), if the signal is not stable.
8.3.1. NR Set No-motion Range
This is the range within which the weighing signal is allowed to fluctuate and still be considered as “stable”.
Permitted values are from 1 to 65535.
Master (PC / SPS) sends Slave (LDU XX.X) responds Meaning
NR  R+00010 Request: NR = 10 d
NR 2  OK Setup: NR = 2 d
WP
 OK Setup saved
Example: For NR = 2 the fluctuations within a maximum of ± 2 d, in the period NT, will be considered “stable”.
Factory default: NR = 1 [= ±1d]
8.3.2. NT Set No-motion Time Period
This is the time period (in milliseconds) over which the weight signal is checked to see if it is “stable” or has “no-
motion“. The weight signal has to vary by less than NR divisions over the time period NT to be considered
‘stable’. Permitted values are from 1 to 65 535.
Master (PC / SPS) sends Slave (LDU XX.X) responds Meaning
NT  T+01000 Request: NT = 1 000 ms
NT 500  OK Setup: NT = 500 ms
WP  OK Setup saved
If the value of NT =500 milliseconds, the output must not fluctuate more than NR increments within 500
milliseconds in order to be considered “stable”.
Factory default: NT = 1 000 [ms]