Command
Parameter
Meaning
nSD
-
Decrement the speed by 1 rpm
nGO
-
Start running
nST
-
Stop running
nRC
-
Change direction
nRR
-
Set direction to clockwise
nRL
-
Set direction to counter-clockwise
nRS
-
Return status. See Note 2
nRT
-
Return the total deci pump revolutions
count
nW
line1~line2~line3~line4@
Display text on 1 to 4 lines with ~ as the line
delimiter. Terminated by the @ character.
See Note 3
nZY
-
Return 0 for stopped or 1 for running.
NOTES: Historical basic protocol
Note 1:
The correlation between the tachometer pulses and the motor rotation is fixed and provides a
measurable and absolute way of monitoring the number of revolutions of the gearbox output shaft -
10 pulses per revolution. This in turn allows the count to be equated to the amount of material
dispensed - assuming that the pumphead type and tube size are known.
Note 2:
The status is returned to the sender in the following format:
SOM,address,pumptype,ml/rev/pumphead,tubesize,speed,CW or CCW,pumpnumber,pump revs
count,0 or 1(for stopped or running),Leak detect (0=InActive, 1=Active),Auto/Manual(0=Manual,
1=Auto),Adapter detect(0=not fitted,1=fitted),Direction enable(0=disabled, 1=enabled),Spare1 input4
(0=inactive, 1=active),Spare2 input5 (0=inactive,1=active),checksum,EOM e.g.
<1,530Du,15.12,520R,9.6,220.0,CW,123456789,12345,1,0,0,0,0,0,0,CS>
Note 3:
1 to 4 lines of text can be written with ~ as the line delimiter and @ as the message end.
i.e., 1W520Du@ and 1W520Du~@ are both valid commands
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Summary of Contents for 630 Du
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