Evoqua WALLACE & TIERNAN MFC, Instruction Manual

Page: 43 / 268

MFC
Functions
4.
43
The possible control functions are determined on the MFC by
assigning the sensor measuring module to the module slot. This
means that the type of sensor measuring module installed on slot
1 to determines which measured variables will be controlled (i.e.
only alarms or limit switches are available).
Sensor measuring module 1 single feed forward control, single
feedback closed-loop control or
compound-loop-control
Additional alarms and limit switches
Sensor measuring module 2 Single feedback closed-loop
control or single feed forward
control
Additional alarms and limit switches
Measured variables for setpoint
trim for Control module 1
2x timer contact
Sensor measuring module 3 Alarms and limit switches
Sensor measuring module 4 Alarms and limit switches
Sensor measuring module 5 two control variables for:
- Current flow rate measurement
for thecompound-loop-control/
single feed forward control of
module 1 as well as for the single
feed forward control of module 2
- Signal input for external setpoint/
dosing factor for the module 1
controller
Please note
Not all the same controller functions are available in all
applications (see chapter 4.4 “Applications" on page 71).
Controller outputs Controller outputs for positioners, dosing pumps, pulse pumps,
continuous mA output as well as a dosing contact.
Adaption programme The adaption programme automatically determines the control
parameters for measuring module 1 and 2 when commissioning
the single feedback closed loop control (chlorine, chlorine dioxide,
ozone and potassium permanganate modules only).