Mitsubishi Electric FR-F820-00046 Instruction Manual page 513

 Communication specifications
• The specifications conform to the BACnet standard of physical medium EIA-485.
Physical medium
Network topology
Communication method
Communication protocol
Maximum connection
Node number
Supported property of BACnet standard object type
Supported BIBBs (Annex K)
BACnet standardized device profile (Annex L)
Segmentation
Device address binding
NOTE
• This product is classified as a BACnet Application Specific Controller (B-ASC).
• This product is designed for multiple master network, therefore 2-wire type connection is supported.
 Node with network bias resistors
• This product is a node with local bias resistors. Therefore at least one node must be a node with network bias resistors in
the network configuration.
• When configuring the network with only this products, refer to the following, and make the node with network bias resistors.
(When using two sets in one segment, insert them into both ends of the network.)
512
5. PARAMETERS
5.12 (N) Communication operation parameters
Item
Connection port
Data transfer method
Baud rate
Start bit
Data length
Parity bit
Stop bit
Master
Other
node
P5S SG
(VCC) (GND)
VCC GND
VCC GND
P5S SG
(VCC) (GND)
EIA-485 (RS-485)
RS-485 terminals (PU connector is not available.)
NRZ encoding
9600 bps, 19200 bps, 38400 bps, 57600 bps, 76800 bps, 115200 bps
Fixed to 1 bit
Fixed to 8 bits
Fixed to none
Fixed to 1 bit
Bus topology
Token passing (token bus)
Master-slave (Only the master is available for this product.)
MS/TP (master-slave/token passing LAN)
255 (up to 32 for one segment, addition with a repeater available)
0 to 127
0 to 127 (This product is the master.)
Refer to page 514.
Refer to page 521.
Refer to page 521.
Not supported
Not supported
SDA1 SDB1 RDA1 RDB1
(TXD1+) (TXD1-) (RXD1+) (RXD1-)
+ TXD - + RXD -
+ TXD - + RXD -
SDA2 SDB2 RDA2 RDB2
(TXD2+) (TXD2-) (RXD2+) (RXD2-)
Connect two 510
Description
Ω
(1/4W) resistors.