Serial Communication For Fc Protocol; Protocols; Packet Communication - Trane TR1 6002 Installation And Operation Manual

Serial Communication for FC Protocol

MASTER

Protocols

All TR1 drives have an RS-485 (EIA-485) port which allows control-
ling the drive by one of four different serial communication protocols.
The protocols, which can be selected in parameter 500, Protocol, are:
Johnson Controls Metasys N2
●
Siemens FLN
®
●
Modbus RTU
●
FC protocol
●
Metasys N2 is a registered trademark of Johnson Controls.
FLN is a registered trademark of Siemens.
If FC protocol is to be selected, set parameter 500, Protocol to FC
protocol .
For further information on operating the drive through N2, FLN, or
Modbus RTU communication, request the related operator’s manual
from Trane.
ADDRESS 1
ADDRESS 2
®
ADDRESS 31
REPEATER
ADDRESS 126

Packet Communication

Control and Reply Packets
The packet communication in a master/slave system is controlled by the
master. The drives are the slaves. A maximum of 31 TR1 drives can be
connected to one master unless a repeater is used. If a repeater is
used, a maximum of 126 drives can be connected to one master.
The master continuously sends packets addressed to the slaves and
awaits reply packets from them. The response time of the slaves is a
maximum of 50 ms.
Only a slave that has received a faultless packet addressed to that
slave will respond by sending a reply packet.
Broadcast
When a master sends a packet to all slaves connected to the bus at the
same time, it is called a broadcast. In broadcast communication, if the
packet has been correctly received, the slaves do not send reply
packets to the master.
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