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8: Using the Shark® 50B Meter
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• Default Gateway - the IP address of the gateway. The default is 10.0.0.224.
• BACnet Device Number - a numeric code used to identify the meter. This number
is auto-generated from the MAC address.
• BACnet Device Name - field for the device name, which can be up to 63 charac-
ters in length.
• BACnet Device Description - optional field where you can enter a description of
up to 63 characters which will be added as a prefix in the name of all registers
representing the meter’s BACnet objects.
• Modbus TCP Port for TCP to RTU Router - the default port is 502. As long as this
field is not 0, the router is enabled, which lets the meter communicate with
Modbus TCP/IP Master devices.
NOTE:
Using the Modbus connection, the meter cannot be connected to multiple
Modbus Masters at the same time; only one Modbus Master will work properly.
• Enable BACnet/IP Control Objects - Check this box to allow direct access to
Modbus registers. If enabled, the Control Objects are represented by the follow-
ing three Analog-Value BACnet Objects:
a. 500001 is a writeable object called MOD_ID_TARGET (“target device identi-
fier to be read/written”). Since the meter has a hard-coded Modbus
address of “1” only this value needs to be entered before first access to a
Modbus register. The default = -1.0. -1.0 also means do not execute
#500003 (neither read nor write).
b. 500002 is a writeable object called MOD_REGISTER (“register to be read/
written”); for example, “1000” to access the first register of volts A-N. The
default = -1.0 after any reboot. -1.0 also means do not execute #500003
(neither read nor write).
c. 500003 is a readable/writeable value called MOD_VALUE (“value to be read
from or written to select register”).
The MOD_REGISTER resets with -1.0 after each Read/Write (whether or
not successful), from/to MOD_VALUE with valid MOD_ID_TARGET and
MOD_REGISTER. MOD_REGISTER will also be set to -1.0 30 seconds after
it is written to.