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E34 Series Installation Guide
TM
1. BACnet MS/TP mode
The first three options are discussed previously.
The DeviceID_Offset parameter is used to assign Device_IDs on power-up or on restart until they have been overwritten via
BACnet. Enter your desired value here and click
Submit.
The new value is first used at the next power-up or system restart. Valid
Device_ID numbers range from 1 to 4194303. Since the numbers assigned during discovery are the sum of the Offset and the
Modbus address (which can be any value from 1 to 247), the Offset values entered in the GUI must be no larger than 4194057.
The E34E gateway creates a BACnet virtual router and separate BACnet devices for each 42-channel meter panel behind this virtual
router, allowing the devices to be discoverable and independently accessed via BACnet, even if the virtual router is connected by
MS/TP, using a single MAC address. To use this product with MS/TP, the BACnet system must support the discovery and use of a
BACnet router on the MS/TP trunk and any devices beyond it. This virtual router creates an exclusive BACnet network on which
the meter’s BACnet devices reside. This network must have a BACnet network number that is different from any other networks in
the entire BACnet enterprise. When multiple E34E products are added anywhere in the enterprise, each one must have a unique
network number. If an exclusive value in this field is not set, communication conflicts in the BACnet system may occur.
Enter a non-conflicting value here and click
Submit
. Valid network numbers range from 1 to 65534; if other values are entered,
the network number defaults to 5. The new value is first used at the next power-up or system restart. If using an external BACnet
router to connect the E34E as an MS/TP device, it is recommended that the router also be restarted after the E34E has completed
discovery, when the network number is changed.
The next field for the BACnet MS/TP protocol mode is the MSTP_Max_Master, which allows this value to be set prior to using
BACnet software to access the E34E. The default value of 127 works regardless of the addresses the MS/TP network uses, but
selecting a lower value may optimize the network. Do not set this value lower than the highest address on the network. To set this
Gateway Configuration
(cont.)
