Configuration -> Control -> ENERGY [Danfoss Supported
Power meter]
As previously described, the AK-SM offers communication
support to the Wa, Veris and Carlo Garvazzi EM24 power
meters. These meters offer increased parameters that can be
viewed and logged in the AK-SM.
Note-
due to differing baud rate specifications the Carlo Garvazzi
power meter should not be connected on the Modbus channel if
an existing network of Danfoss EKC modbus devices is estab-
lished.
• WattNode ® + (Continental Control Systems)
meter requires
LonWorks® FTT10 interface - Use Danfoss (part #TP78-02)
TP78 to FTT10 network bridge to allow correct communica-
tions .
• WattNode ®+ Modbus
(Continental Control Systems)
meter,
connects over the AK-SM modbus network
• Carlo Garvazzi EM24
supported meters have built in Modbus
communications - connect directly to the AK-SM Modbus
port.
•
Veris EH35/36 (Veris Industries
®
)
Modbus energy meters
Enter custom name for pulse input
Enter unique Board & Point address. This input
address should have the pulse input (via the power
meter) connected
Any Emergency or Coupling Switch (defined in meter
setup) will require address configuration.
Add these relevant address’s via the On/Off Input tab
ADDRESSES
Configuration->Control->Energy->Addresses
After the relevant Energy control questions have been config-
ured, appropriate AK I/O addresses need to be set for the pulse
meter input. The address input corresponds to the Board & Point
address of the AK I/O module -
only use module type AK-XM
107A for pulse meter inputs.
Navigate to the
Addresses
Tab
(Demand limiting will be shown in later section). Enter appropri-
ate Board & Point location for the pulse input, under the Sensors
tab (as shown below).
Carlo Gavazzi ® power meter configuration (used in junction
with RS485 AK-SM Model)
The following section describes the required steps to connect
& configure the Carlo Garvazzi EM24xx meter over a modbus
network connection.
Before any configuration can take place, ensure the meter is
securely wired, has a valid network address (different from any
other nodes on the ‘Controller’ network) and has a baud rate set to
9600- consult the meter manual for specific information on how to
set the network address & baud rate. The data format is 1 start bit,
8 data bit, no parity and 1 stop bit.
Once set, ensure correct interconnection to the RS485 modbus
port on the AK-SM.
(1) To avoid errors due to the signal reflections or line coupling, it
is necessary to terminate the bus at the beginning and at the end
(inserting a 120 ohm 1/2W 5% resistor between line B and A in the
last instrument and in the Host interface).
(2) The network termination is necessary even in case of point-to-
point connection and/or of short distances.
(3) For connections longer than 1200m a signal repeater is
necessary.
Once all communication wiring has been set, perform a network
scan- details of how to perform network scans can be seen in
the
Network Nodes
Section of this user guide. Ensure Modbus
channel is checked in the Node Overview page.
Modbus Port on AK-SM
AK-SM 850
User Guide
Lit. no.
USCO.PI.R1.E1.02 © Danfoss 07-2013
59