Watson-Marlow 530 Bp Installation, Operating And Maintenance Manual page 27

*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
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
m-530bpn-en-08.1
Description
Motor running (1 = running)
Global error flag (1 = error)
Fieldbus control (1 = enabled)
Guard (Guard enabled models only) (1=guard open)
Over current error
Under voltage error
Over voltage error
Over temperature error
Motor stalled
Tacho fault
Leak detected
Low setpoint - out of range
High setpoint - out of range
Reserved
Reserved
Reserved
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