Evoqua WALLACE & TIERNAN MFC, Instruction Manual

Page: 44 / 268

44
WT.050.580.000.DE.IM.0714
Functions
MFC
4.
Safety functions The following safety functions are integrated into the
control if configured accordingly:
• Safety cut-off if dosing tank signals empty and also if the
sample water supply fails
• Dosing time delay
• Alarms
• External stop for all controllers with digital input
• "Positioner closed" function in the event of a power failure
(only if positioner has external power supply)
• Password protection on two levels
Infrared calibration Infrared calibration is performed in conjunction with the
photometer P42
i-cal . The measured calibration value is
automatically transmitted at the correct time with infrared light.
Potentially faulty calibrations are prevented by a time-stamp
function (e.g. if the chlorine content changes on the MFC during
the DPD calibration). The MFC operates internally with past values
from up to 15 minutes of recorded memory.
Applications 1 to 5 The MFC provides the option to customise the system to the
desired on-site controller functions and systems using up to 5
integrated applications (see chapter 4.4 “Applications" on
page 71).
Links The MFC supports the following links:
• CMS 3.0
Visualisation software for archiving and display of measured
values on PCs with Windows operating systems
• SECO-S7:
PLC driver for data links to Siemens PLC,
Type S7-300
• OPC-Server Data Access V2.0:
Server software for Windows operating systems for data links
to visualisation system with OPC client capability
• ChemWeb server:
Measured value archiving and display, remote diagnosis,
remote access with standard browser with Internet and
e-mail capability
• Process control systems of different manufacturers
(refer to the manual "RS-485 Bus Interface" for description,
specification and protocol)