Operating Instructions

Chapter 4 - Parameters and Menu Structure
I/O and Hardware (M5)
130 | 187
Siemens Industry, Inc.
Siemens BT300 HVAC Drive
DPD01809
Smart Infrastructure
2019-05-29
1. Complete all settings required for Monitoring as listed above.
2. Set Ctrl. Place Auto (P3.2.1) to a value of FieldbusCTRL.
For commanding Start/Stop through the N2 protocol and Speed Reference through an Analog Input, complete
the following changes:
1. Complete all settings required for Monitoring as listed above.
2. Set Ctrl. Place Auto (P3.2.1) to a value of FieldbusCTRL.
3. Set FieldbusCtrl Ref (P3.3.9) to a value of AI1 or AI2 (depending upon which AI is in use).
For commanding Start/Stop through a Digital Input and Speed Reference through the N2 protocol, complete
the following changes:
1. Complete all settings required for Monitoring as listed above.
2. Set Ctrl. Place Auto (P3.2.1) to a value of I/O Control.
3. Set I/O A Ctrl Ref (P3.3.3) to a value of Fieldbus.
BACnet MS/TP (M5.8.3)
BACnet stands for Building Automation and Control Networks. It is the common name for the communications
standard ISO 16484-5 which defines the methods and the protocol for cooperating building automation
devices to communicate. Devices can be designed to operate using BACnet communication protocol, as well
as utilizing BACnet protocol to communicate between systems. BACnet is an internationally accepted protocol
for building automation and control over a communications network.
BACnet provide a method by which computer-based control equipment form different manufacturers can work
together, or “interoperate”. To achieve, components must be able to exchange and understand BACnet data
messages.
The Siemens BT300 is standard equipped with BACnet support.
If Protocol (P5.8.1.1) is set to a value of BACnet MS/TP, then configuration and status parameters related to
the BACnet MS/TP fieldbus protocol are made available.
Parameters (M5.8.3.1)
The following configuration parameters are available for the BACnet MS/TP fieldbus protocol:
Table 95: BACnet MS/TP Parameters.
Menu
Parameter
ID
Unit
Min
Max
Default
Description
P5.8.3.1.1
Baud Rate
2392
bps
9600
76800
9600
on the network as follows:
1 = 9600
2 = 19200
3 = 38400
4 = 76800
P5.8.3.1.2
Autobauding
2330
Disabled
Enabled
Disabled
Defines if autobauding can be used to
configure the Baud Rate (P5.8.3.1.1).
P5.8.3.1.3
MAC Address
2331
1
127
1
Defines the unique device address for the
RS-485 network.
P5.8.3.1.4
Instance Number
2332
0
4194303
0
Defines the unique device address for the
IP network if a IP-MS/TP router is used.
P5.8.3.1.5
Communications Timeout
2333
s
0
65535
10
Defines the amount of time in which a
packet is not received before a
communications timeout is
faulted/alarmed.