Watson-Marlow MC100 - Manual (Page 24)

Users Manual
MC100
MC100 Users Manual Profibus DP - rev 4 Rev. 4 Page 24 of 40
7.1.5 Process status bits from the pumps – word 1 to 9 (MC100 PLC)
For each pump address (1 to 16) one byte is dedicated for status bits. I.e. one data word holds the
status bits for two pumps.
Regardless of the number of pumps attached to the MC100 all pump control words has to be sent. The
data for pumps not available are ignored.
Word 8 Word 7 Word 6 Word 5 Word 4 Word 3 Word 2 Word 1
P16 P15 P14 P13 P12 P11 P10 P9 P8 P7 P6 P5 P4 P3 P2 P1
Bit mapping in each status byte (P1 to P16):
7 6 5 4 3 2 1 0
ALARM Direction DONE Pump Dispense Tube Br. BUSY READY
Bit 0:
READY Pump is ready (self check is OK).
Bit 1: BUSY 1 Indicate that the pump is active, either dispensing or pumping
0 the pump is idle
Bit 2: Tube Br. Tube bridge bit:
1 = tube bridge on
0 = tube bridge off.
Please note that due to security reasons the pump cannot run if the tube bridge
is off. This is controlled by the pump controller.
Bit 3: Dispense Dispense bit: 1 = dispense mode
Bit 4: Pump Pump bit: 1 = pump mode
Bit 5: DONE 4 Is set when pump goes from dispensing to idle / reset by a new START bit.
Bit 6: Direction Handshake for bit B5 from command byte (0=normal / 1=reverse direction.)
Bit 7: ALARM See Chapter 7.3.2.1.1 for further information
4 The DONE bit can be necessary to use if there is very short filling times, where the BUSY signal is not detected because of
transmission times on the fieldbus network.