Watson-Marlow 530 Bp Installation, Operating And Maintenance Manual page 25

Fail-safe
The fail-safe user parameter is used to set the correct course of action to take in the event of a PROFIBUS
communications failure. The fail-safe byte is configured as shown in the following table. If no bits are set
or an invalid bit pattern is set the default fail safe behaviour shall be to stop the pump.
Bit
0x00 No fail safe action
0x01 Last demanded speed
0x02 Fail-safe speed
The fail-safe speed parameter is used to set the speed at which the pump should be driven is a PROFIBUS
communications error occurs and if bit 1 in the fail safe user parameter is set.
PROFIBUS data exchange
Default address:
PROFIBUS Ident:
GSD file:
Config:
User parameter bytes:
16 bit Byte 1
Byte 2
16 bit Byte 3
Byte 4
16 bit Byte 5
Byte 6
Control word
Bit
0
1
2
m-530bpn-en-08.1
126
0x0F70
WAMA0F70.GSD
0x62, 0x5D (3 words out, 14 words in)
6
Cyclic data write (from master to pump)
Control word (high byte)
Control word (low byte)
Pumphead speed setpoint (unsigned) (high byte)
Pumphead speed setpoint (unsigned) (low byte)
Set flow calibration in µl per revolution (high byte)
Set flow calibration in µl per revolution (low byte)
Description
Motor running (1 = running)
Direction (0 = CW, 1 = CCW)
Tacho reset (1 = reset count)
Description
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