Watson-Marlow MC100 - Manual (Page 25)

Users Manual
MC100
MC100 Users Manual Profibus DP - rev 4 Rev. 4 Page 25 of 40
7.2 Operation Parameters/Parameter specifications
The section describes parameter exchange between MC100 and PLC 5
7.2.1 List of basic parameters
Parameter Description Data type Range Default DW
1 Volume Double integer 1000-999990000 10000000 12-13
2 Tube Integer 1-10 6 14
3 Speed Integer 30-600 100 15
4 Acceleration Integer 1-200 10 16
5 Reverse Integer 0-5 0 17
6 Density Double integer 50000 – 200000 100000 18-19
7 Calibration value Double integer 50 –200 % of Volume - - - 20-21
Please note that to allow the MC100 to be used with PLC’s without capability to use floating point data
the values in parameter 1, 6 and 7 (volume, density and calibration) is converted into double integer
values. The MC100 will handle the double integer as a floating point value with a fixed decimal point
with 5 decimals.
As a consequence of the above the PLC program must multiply the values for volume, density and
calibration by 100.000 before sending the value to the MC100.
Examples:
Floating point value 123.45678 must be send to the MC100 as 12345678
Floating point value 1.2 must be send to the MC100 as 120000
The parameters above are:
Volume
The volume to be dispensed at each filling. Please note that to avoid
overfilling the first dispense (before calibrating) will be approximately 80% of
the requested filling.
Tube The tube number (1 to 10) used selected from the tube table. The tube table
is specific for the pump type and can be downloaded from the pump controller
(please see next section). The tube table for each pump type is found in
appendix 2 in this manual.
Speed The revolutions per minute of the pump. If the product is foaming the
revolutions may have to be lowered. The speed range is 30 to 600; however,
the upper value is dependent on the pump type and the selected tube size.
Please see the details in appendix 2.
Acceleration A number indicating the ramp up and down when starting/stopping the
dispensing. The range is 1 to 200 rpm/s. The upper value is dependent on the
pump type and the selected tube size.
Reverse A number indicating the reversing of the pump after dispensing to avoid
dripping of the product between dispensing. The reverse is a number in the
range 0 to 10. The physical reversing is dependent on the pump type. For a
PD12 the value 10 gives ¼ reverse rotation where for a PD22 the value 10
gives a full reverse rotation.
Density The density of the product to use when calibrating. When calibrating the
5 These parameters can also be exchanged using DPV1 Class 2 acyclic data exchange (MSAC2), contact Watson-Marlow
Flexicon for a description if necessary