Watson-Marlow MC100 - Manual (Page 23)

Users Manual
MC100
MC100 Users Manual Profibus DP - rev 4 Rev. 4 Page 23 of 40
7.1.4 Process control bits for the pumps– word 1 to 9 (PLC MC100)
For each pump address (1 to 16) one byte is dedicated for control bits. I.e. one data word holds the
control 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 command byte (P1 to P16):
7 6 5 4 3 2 1 0
Direction
Disable in
Par./Serial
RESET PUMP DISP START
Bit 0: START
Start a single Dispense cycle, when the Pump is set in Dispense mode (Bit. 1)
This bit must be cleared upon receiving the BUSY bit in the status byte for the pump,
see below.
Bit 1: DISP Sets the pump in dispense mode and thereby enables the START bit to start
dispenses. If removed during dispensing the pump stops immediately.
Bit 2: PUMP 2 Starts pump running continuously with the set speed.
Bit 3: Reserved for future use
Bit 4: RESET To be used with future pumps
Bit 5: Disable pump in parallel and serial mode. If set high the pump will ignore dispense
and pump bites.
Bit 6: Direction 3 [1/0] [Backwards/Normal] pump and dispense direction.
Bit 7 Reserved for future use
2 The DISP bit has higher priority and must be cleared before setting the PUMP bit.
3 Available for pumps able to handle this function (GD30).