Selecting The Device Object Name; Selecting The Bacnet Mac Address; Termination Resistor; Cable Length - Grundfos CIM 300 User Manual

2.6 Selecting the Device Object Name

The property Device_Name is a character string that must be
unique inter-network-wide. By default, the name will be constructed
as "Grundfos - XXXXXX" where XXXXXX is the current Device
Object Instance Number as described in section
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 will be stored in the device and replace
the default naming scheme.
Related information
2.5 Selecting the Device Object Instance Number

2.7 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 will
result in a MAC address of 0.
Setting the BACnet MAC address
For a complete overview of BACnet addresses, see section
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
10. BACnet MAC address, CIM 300

2.8 Termination resistor

A termination resistor for line termination is fitted on CIM 300 and
has a value of 120 Ω. It is to be cut in if CIM 300 is set as the last
station on the network.
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: Termination resistor cut out.
10
Selecting the
SW6 SW7
BACnet
SW2
ON ON
OFF OFF
ON OFF
OFF ON

2.9 Cable length

The maximum recommended 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
use of a screened, twisted-pair cable with a characteristic
impedance between 100 and 130 Ω.

2.10 LEDs

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 CIM 300 and the Grundfos pump.
2.10.1 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.
2.10.2 LED2, internal communication
Status Description
Off CIM 300 has been switched off or is starting up.
No internal communication between CIM 300
Flashing red
and the pump.
CIM 300 does not support the specific pump
Permanently red
version.
Internal communication between CIM 300 and
Permanently green
the pump is OK.
During startup, there may be a delay of up to 5 seconds
before the LED status is updated.
2
(AWG 18) cable.