Cyclic data read (from pump to master)
32 bit
Byte 7
Tacho counter (high byte)
Byte 8
Tacho counter (low byte)
Byte 9
Tacho counter (high byte)
Byte 10
Tacho counter (low byte)
16 bit
Byte 11
Pump outputs flow calibration in deci μl (For example: A value of 4
indicates 40μl) (high byte)
Byte 12
Pump outputs flow calibration in deci μl (For example: A value of 4
indicates 40μl) (low byte)
32 bit
Byte 13, 14,
15, 16
Unassigned
32 bit
Byte 17, 18,
19, 20
Unassigned
32 bit
Byte 21, 22,
23, 24
Unassigned
32 bit
Byte 25, 26,
27, 28
Unassigned
*Note – ‘Pumphead speed setpoint (unsigned)’, reports the speed that the pump is running in Profibus
mode.
This is reported as an integer in units of ‘rpm’ and will always be the same as the Profibus ‘pumphead
speed setpoint’ received by the pump.
Customers who wish to verify the flow rate of the pump should use the tacho counter, (which reports
pumphead revolutions where 10 increments = 1 revolution) and the µl per revolutions value (Byte 11,12)
to calculate flow.
For example, first reset tacho counter to zero then record change in readings over 1 minute, then:
Flow µl/min = (pumphead revolutions in 1 min) x µl per rev
= (Change in tacho count in 1 min /10) x µl per rev
Status word
Bit
Description
0
Motor running (1 = running)
1
Global error flag (1 = error)
2
Fieldbus control (1 = enabled)
m-730un-en-08.1
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Содержание 730 U
Страница 14: ...8 3 Pumphead options 730 pump range 720R 720R RX 720RE 720RE REX 14 m 730un en 08 1 ...
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Страница 112: ...Refitting 1 2 3 112 m 730un en 08 1 ...