Watson-Marlow MC100 - Manual (Page 22)

Users Manual
MC100
MC100 DeviceNet OM 1.15 EN Version: 1.04 Page 22 of 43
7.1.5 Process status bits from the pumps
To retrieve status from each pump, one byte (8 bits) is dedicated as described below.
Minimum one word is received with status from the pumps. The number of pumps connected is a
parameter, which is part of the configuration of the number of cyclic bytes of the network.
The MC100 will always automatically send the number of bytes for the connected pumps, after a
factory reset to defaults.
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 the status byte:
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” pump is idle
Bit 2: Tube Br. Tube bridge bit: ”1” = tube bridge on, “0” = tube bridge off.
Bit 3: Dispense Dispense bit: “1” = dispense mode
Bit 4: Pump Pump bit: “1” = pump mode
Bit 5: DONE 4 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 8 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.