3. Connecting fieldbus to MIXIT
3.1 Configuring BACnet MS/TP
The CONNECT upgrade must be activated on the MIXIT
unit in order for fieldbus connectivity to be unlocked.
To set up the fieldbus connection, you must complete the following
steps:
1.
Turn on MIXIT and connect it to the MAGNA3 pump. See
separate installation and operating instructions for MIXIT.
2.
Set up the fieldbus connection in the Grundfos GO Remote
app.
• If it is the first time MIXIT is connected to Grundfos GO
Remote, the setup is done via the
Initial startup
wizard.
The wizard guides you through the setup.
• The connection can also be set up via the
Settings
or
Upgrades
menu:
-
Settings
menu:
Settings
>
Setpoint
>
Reconfigure
setpoint input
>
Setpoint from fieldbus connection
.
Press
Next
, select
BACnet MS/TP
and press
Next
again.
-
Upgrades
menu:
Upgrades
>
CONNECT upgrade
>
Reconfigure
>
Fieldbus connectivity
>
BACnet MS/TP
.
3.
Define the following in Grundfos GO Remote:
a. Baud rate (transmission speed)
The transmission speed must be set correctly before the
MIXIT unit is ready to communicate on the BACnet MS/TP
network. Use Grundfos GO Remote to set the transmission
speed. All devices on the BACnet MS/TP network must
communicate at the same transmission speed.
b. Range (MAC address and max. master)
The MAC address must be within the range of 0 to 127 and
must be unique on the BACnet MS/ TP segment. An illegal
value will result in a MAC address of 0. Max. master must be
within the range of 1 and 127.
c. Device Object Instance Number
The Device Object Identifier value consists of a 10-bit Object
Type (bits 22 to 31) and a 22-bit Instance Number (bits 0 to
2).
The Object Type is fixed and determines that it is a Device
Object. The Instance Number is a numeric code used to
identify the device. It must be unique inter-network-wide,
that is on all interconnected networks.
The default BACnet Device Object Instance Number is
227000. The custom Device Object Instance Number, which
is 231, can be activated in Grundfos GO Remote and
customised via AV,0.
ID
Object name
R/W
AV,0
Config Custom Device Object
Instance Number
R/W
4.
Connect the fieldbus cable to MIXIT via the RS485 transceiver.
Follow the instructions in Grundfos GO Remote. See also
.
5.
Cut in the termination resistor for line termination if the unit is
set as the last station on the network. Set the DIP switch to
"ON" to activate. The termination resistor is fitted inside the
MIXIT unit and has a value of 120 Ω.
TM075759
6.
Define control source for MIXIT to accept remote BACnet
commands.
• Set BO,0 to 1 for the MIXIT unit to accept remote BACnet
commands. As default, BO,0 is set to 0 (power on). This
means that if the MIXIT unit has been power cycled, you
must set BO,0 to 1 again in order to set the product back to
bus control.
• The actual control state is verified via BI,0.
ID
Object
name
R/W
Description
BO,0
Set Control
Source
W
0: Local control (default)
1: Bus control
BI,0
Status
Control
Source
R
0: Local control
1: Bus control
You are now ready to customise your BACnet MS/TP connection.
The property Device_Name is a fixed character string that
is named "Grundfos MIXIT".
3.2 Configuring BACnet IP
The CONNECT upgrade must be activated on the MIXIT
unit in order for fieldbus connectivity to be unlocked.
To set up the fieldbus connection, you must complete the following
steps:
1.
Turn on MIXIT and connect it to the MAGNA3 pump. See
separate installation and operating instructions for MIXIT.
2.
Set up the fieldbus connection in the Grundfos GO Remote
app.
• If it is the first time MIXIT is connected to Grundfos GO
Remote, the setup is done via the
Initial startup
wizard.
The wizard guides you through the setup.
• The connection can also be set up via the
Settings
or
Upgrades
menu:
-
Settings
menu:
Settings
>
Setpoint
>
Reconfigure
setpoint input
>
Setpoint from fieldbus connection
.
Press
Next
, select
BACnet IP
and press
Next
again.
-
Upgrades
menu:
Upgrades
>
CONNECT upgrade
>
Reconfigure
>
Fieldbus connectivity
>
BACnet IP
.
3.
Define the following in Grundfos GO Remote:
a. IP address
b. Subnet mask
c. Gateway
d. DHCP (optional)
e. UDP port number (optional)
f. Device name
g. Device location
h. Custom Device Object Instance Number (optional)
i. Foreign device settings (optional)
4.
Connect the fieldbus cable to MIXIT via the Ethernet
port. Follow the instructions in Grundfos GO Remote. See also
a. Check data and link LEDs
The RJ45 socket has two connectivity LEDs:
Yellow on: Ethernet link on RJ45 is okay.
Green on: Data communication ongoing.
9
English (GB)
