Selecting The Device Object Name; Selecting The Bacnet Mac Address; Termination Resistor; Cable Length - Grundfos CIM 300 BACnet MS/TP Instructions Manual

3.6 Selecting the Device Object Name

The property Device_Name is a character string that must be
unique inter-network-wide. By default, the name is constructed as
"Grundfos - XXXXXX" where XXXXXX is the current Device Object
Instance Number as described in the section Selecting the Device
Object Instance Number.
Example
The Device Object Instance Number is 227001, so the Device
Object Name is "Grundfos - 227001".
If a new name is selected, it is stored in the device and replaces the
default naming scheme.
Related information
3.5 Selecting the Device Object Instance Number

3.7 Selecting the BACnet MAC address

To set the BACnet MAC address, use the two hexadecimal rotary
switches, SW6 and SW7.
The value must be within the range of 0 to 127. An illegal value
results in a MAC address of 0.
Setting the BACnet MAC address
For a complete overview of BACnet addresses, see section BACnet
MAC address, CIM 300.
You must set the BACnet MAC address decimally from 0
to 127 and it must be unique on the BACnet MS/TP
segment.
Related information
11. BACnet MAC address, CIM 300

3.8 Termination resistor

A termination resistor for line termination is fitted on the CIM 300
and has a value of 120 Ω. It is to be cut in if the CIM 300 is set as
the last station on the network.
The CIM 300 has two DIP switches, SW1 and SW2, for cutting the
termination resistor in and out.
SW1 SW2
Cutting the termination resistor in and out
Status SW1
Cut in
Cut out
Default setting: The termination resistor is cut out.

3.9 Cable length

The recommended maximum cable length within a BACnet MS/TP
segment is 1200 metres (4000 ft) with 0.82 mm
The connection between the BACnet modules must be made by a
screened, twisted-pair cable with a characteristic impedance
between 100 and 130 Ω.
SW6 SW7
SW2
ON ON
OFF OFF
ON OFF
OFF ON
2
(AWG 18) cable.

3.10 LEDs

The CIM 300 BACnet has two LEDs:
• red and green status LED (LED1) for BACnet MS/TP
communication
• red and green status LED (LED2) for internal communication
between the CIM 300 and the Grundfos pump.
3.10.1 LED1, BACnet MS/TP communication
Status Description
Off No communication
Flashing green Communication active
Flashing red Fault in the BACnet communication
Permanently red Fault in the CIM 300 BACnet configuration
3.10.2 LED2, internal communication
Status Description
The CIM/CIU 300 has been switched off or is
Off
starting up.
There is no internal communication between
Flashing red
the CIM/CIU 300 and the booster system.
The CIM/CIU 300 does not support the
Permanently red
connected booster system.
Internal communication between the CIM/CIU
Permanently green
300 and the booster system is OK.
During startup, there may be a delay of up to 5 seconds
before the LED status is updated.
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