Flintec MCS-64 ModbusOnEthernet - Manual (Page 20)

Page 20 Manual MSC-64: Modbus on Ethernet
5.3 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).
The following functions are disabled if motion is detected: “Calibrate Zero” (CZ) “Calibrate Gain”
(CG) “Set Zero” (SZ) and “Set Tare” (ST).
NR No Motion range [Register = 2112, Type = Int32 ]
This is the range within which the weighing signal is allowed to fluctuate and still be considered
as “stable”.
Value range is 0 to 65 535 .
Master (PC / PLC) sends Device responds Result
NR R+00010 Request: NR = 10 d
NR_2 OK Setting: NR = 2
WP OK Setting saved
Factory default: NR = 1.
NR = 2 i.e. fluctuations within a maximum of ± 2 d, in the period NT, will be considered “stable”.
NT Stabilisation time for in motion band [Register = 2114, Type = Int32 ]
This sets the time in unit “ms” 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’. Value range is 0 to 65 535 ms.
Master (PC / PLC) sends Device responds Result
NT T+01000 Request: NT = 1000 ms
NT_500 OK Setting: NT = 500 ms
WP OK Setting saved
Factory default: NT = 1000 [=1000 ms].
If the value of NT =500 ms, the output must not fluctuate more than NR increments within 500 ms
in order to be considered “stable”.