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13.2 Specifications of MODBUS Communication
Item
Details
Physical interface
RS-485 2-wire half duplex
Protocol
MODBUS RTU mode
Transmission method
Asynchronous
Transmission wiring type
Multi-point bus (either directly on the trunk cable, forming a daisy-chain)
Baud rate
2400, 4800, 9600, 19200, 38400 bps
(Default: 19200 bps)
Data bit
8
Stop bit
1, 2
(Default: 1)
Parity
ODD, EVEN, NONE
(Default: EVEN)
Slave address
1 to 255 (FFh)
(Default: 1)
*0 is impossible to set because of the broadcast address.
The range of 248 to 255 is reserved.
Response time
1 s or less: time to response after query data is received
Maximum transmission distance
1200 m
Maximum connectable devices *1
31 units
Termination resistor
120
Ω 1/2 W
Recommended cable
SPEV (SB)-MPC-0.2×3P (produced by Fujikura Dia Cable) or its equivalent
*1: When the connection terminal is the control unit, the available number varies depending on the system configuration or control setting.
For details, refer to
13.3
Specifications of Ethernet Communication
Item
Details
Interface
1 port (10BASE-T/100BASE-TX)
Connector applicable for external wiring
RJ-45
Cable
Cable compliant with the IEEE802.3 10BASE-T or 100BASE-TX standard
Maximum station-to-station distance
100 m
Number of cascade connection stages *1
Max. 2 stages
Functions supported
Auto MDIX function (straight/crossover cable automatically detected)
IP address
Default: 192.168.3.11
Subnet mask
Default: 255.255.255.0
Default gateway
Default: None (Blank)
*Its number is for the use of repeater hubs.
For the connectable number using switching hubs, contact the manufacturer of switching hubs you use.
