*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)
3
Guard (Guard enabled models only) (1=guard open)
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
Reserved
14
Reserved
15
Reserved
26
m-730bpn-en-08.1
