Watson-Marlow Qdos30 - Manual (Page 35)

Watson-Marlow qdos30 PROFIBUS Pump User Manual 35
If a leak is detected the leak detect screen (16.1 Leak detection on page 54) will
not be displayed. Bit 10 of the status word will be activated to indicate that a leak
has occurred and the pump will continue to run until the Master indicates what action
should be taken.
Cyclic Data Read (from pump to Master)
16 bit Byte 1, 2 Status Word
16 bit Byte 3, 4 Pumphead Measured Speed (unsigned)
16 bit Byte 5, 6 Hours Run
32 bit Byte 7, 8, 9, 10 Tacho Counter
16 bit Byte 11, 12 Read Flow Calibration in μl per revolution
32 bit Byte 13, 14, 15, 16 Fluid Level
32 bit Byte 17, 18, 19, 20 Unassigned
32 bit Byte 21, 22, 23, 24 Unassigned
32 bit Byte 25, 26, 27, 28 Unassigned
Status Word
Bit
Description
0 Motor running (1= Running)
1 Global Error Flag (1= Error)
2 Fieldbus Control (1= Enabled)
3 Reserved
4 Over current error
5 Under voltage error
6 Over voltage error
7 Over temperature error
8 Motor stalled
9 Tacho fault
10 Leak detected
11 Low Setpoint- Out of range
12 High Setpoint- Out of range
13 Fluid level alert
14 Reserved
15 Reserved
Pumphead Measured Speed
The pumphead measured speed is a 16-bit unsigned integer value that represents
the speed of the pump head in 1/10th of RPM. For example 1205 represents 120.5
RPM.
Hours Run
The hours run parameter is a 16 bit unsigned integer and will represent whole hours
of runtime.
Tacho Counter
The tacho counter is a 32-bit integer value. If the tacho reset bit of the control word
is set, the tacho counter will reset to zero.
Read Flow Calibration
The value is a 16 bit unsigned integer representing μl per revolution.