Evoqua WALLACE & TIERNAN MFC, Instruction Manual

Page: 111 / 268

MFC
Functions
4.
111
4.11 CAN interface
The CAN interface of the MFC serves to control CAN actuators
such as V10K with CAN interface or dosing pumps with CAN
interface, for example.
Individual measured values can also be transmitted to other
measuring and control systems using the CAN bus, e.g. SFC
measuring system for Cl
2
tot./Cl
2
free for displaying the combined
chlorine or SFC-Cl
2
++ with pH value input via CAN bus.
The second control measurement can also be imported with the
CAN interface and the setpoint trim application.
The CAN interface of the MFC is electrically isolated. For
connection to a Wallace & Tiernan CAN bus system, three
terminals and a terminating resistor Rt are integrated in the MFC.
The CAN bus is wired from station to station as a two-wire bus.
The cable of type 1x 2x0.75 mm
2
(part. no. W3T168568) is used
as the installation cable. Stub cables are not permitted.
Do not exceed the maximum line length of 1000 m. The CAN bus
is divided into max. 31 segments. In every segment, there can only
be one CAN master. All devices communicating with one another
must be operated in the same segment.
The bus master in the segment is responsible for controlling the
actuators. The bus master is, for example, MFC, SFC.
CAN slaves include, e.g., dosing pumps with CAN interface, V10K
with CAN interface.
Setting parameters: Segment address 1...31
CAN address for actuator 0...31