Transcript
Heliodyne Delta-T Pro Controller BAS and Modbus API OVERVIEW Delta-T Pro Controllers (Delta-T Pro Wi-fi and Delta-T Pro Ethernet) provide read-only sensor and performance data directly to MODBUSbased building automation systems (BAS). PROTOCOLS OTHER THAN MODBUS For building automation systems that do not use MODBUS, Heliodyne will provide a bridge made by one of our partners configured to read Delta-T Pro data and communicate in your choice of over 100 protocols. Our partner provides industry-leading technical support for establishing a data connection to existing systems. DATA POINTS The Delta-T Pro delivers 22 read-only data points in unsigned 16 - bit (UINT16) format. Because Modbus protocol does not support floating point numbers directly, the data is split up into two parts: the whole number part immediately followed by the decimal part.
GND Rx Tx ADDRESS
POINT
ADDRESS
POINT
30001
T1 - ºF Integer
30012
T6 - ºF Decimal
30002
T1 - ºF Decimal
30013
T7 - ºF Integer
30003
T2 - ºF Integer
30014
T7 - ºF Decimal
30004
T2 - ºF Decimal
30015
VFS - GPM Integer
30005
T3 - ºF Integer
30016
VFS - GPM Decimal
30006
T3 - ºF Decimal
30017
RPS - PSI Integer
30007
T4 - ºF Integer
30018
RPS - PSI Decimal
30008
T4 - ºF Decimal
30019
Pulse - GPM Integer
30009
T5 - ºF Integer
30020
Pulse - GPM Decimal
30010
T5 - ºF Decimal
30021
Today’s Energy - kBTU Integer
30011
T6 - ºF Integer
30022
Today’s Energy - kBTU Decimal
DB9 Pinout
5
4
3
2
1
5
4
3
2
1
Controller Connection Port J-15
MODBUS PARAMETERS Heliodyne Pro Controllers can be configured as either MODBUS RTU or MODBUS TCP slaves. To enable, connect directly to the controller and go to the Settings page - ‘SYSTEM’ tab as shown above. RTU is delivered via RS-232 communication and requires a direct link to the client using an IDE 10pin to DB-9 Female cable adapter available from Heliodyne. (Baud = 9600, Data bits = 8, Parity = None, Stop bits = 1). The 10-pin connector must be connected to RS-232 portJ-15 on the Pro’s circuit board. The cable adapter from Heliodyne comes standard 1’ length. An RS232 cable with DB-9 connector can be used to lengthen the standard Heliodyne cable adapter (industry maximum is 50’ or 2500pF capacitance). TCP is delivered over a standard Ethernet / IP (Internet Protocol) network. Simply connect the DeltaT-Pro to the network and add the Delta-T Pro’s IP address to the desired Modbus client for data polling. SHOULD I USE RTU OR TCP? • The benefit of RTU is the data is delivered through a cable directly connected to the client; it is not subject to network outages. However, the distance from the Pro to the client is limited to 50’. • TCP does not require any labor intensive cabling, which may be unfeasible at some sites, it relies on the existing network infrastructure to deliver data. SUPPORTED FUNCTIONS
The Delta-T Pro is programmed to respond to MODBUS function code 04, which serves out all points on a single query. Note: The DeltaT-Pro will automatically respond to function code 04 whenever you request addresses between 30000 and 39999. Heliodyne, Inc. · 4910 Seaport Ave · Richmond, CA · 94804 T: 510.237.9614 · F: 510.237.7018
[email protected] · www.heliodyne.com
Delta-T Pro Downloads \ White Papers \ Modbus - Rev B - Aug 20, 2013
