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13.2 Specifications of MODBUS Communication
Item
Physical interface
Protocol
Transmission method
Transmission wiring type
Baud rate
Data bit
Stop bit
Parity
Slave address
Response time
Maximum transmission distance
Maximum connectable devices *1
Termination resistor
Recommended cable
*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
3 System Configuration.
13.3 Specifications of Ethernet Communication
Item
Interface
Connector applicable for external wiring
Cable
Maximum station-to-station distance
Number of cascade connection stages *1
Functions supported
IP address
Subnet mask
Default gateway
*Its number is for the use of repeater hubs.
For the connectable number using switching hubs, contact the manufacturer of switching hubs you use.
RS-485 2-wire half duplex
MODBUS RTU mode
Asynchronous
Multi-point bus (either directly on the trunk cable, forming a daisy-chain)
2400, 4800, 9600, 19200, 38400 bps
8
1, 2
ODD, EVEN, NONE
1 to 255 (FFh)
*0 is impossible to set because of the broadcast address.
The range of 248 to 255 is reserved.
1 s or less: time to response after query data is received
1200 m
31 units
120 Ω 1/2 W
SPEV (SB)-MPC-0.2×3P (produced by Fujikura Dia Cable) or its equivalent
1 port (10BASE-T/100BASE-TX)
RJ-45
Cable compliant with the IEEE802.3 10BASE-T or 100BASE-TX standard
100 m
Max. 2 stages
Auto MDIX function (straight/crossover cable automatically detected)
Default: 192.168.3.11
Default: 255.255.255.0
Default: None (Blank)
125
Details
(Default: 19200 bps)
(Default: 1)
(Default: EVEN)
(Default: 1)
Details
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