SMC Networks HRR012-A*-20 Series - Communication Specification

HRX-OM-W004
Chapter 3 Serial communication
3.3 Communication specification HRR Series
3-2
Fig 3.2-2 RS-232C connector connection
3.3 Communication specification
Table 3.3-1 Serial communication specification
Item Specification
Connector type (for the product) D-sub9P type Female connector
Standard
Select from EIA RS-485／RS-232C
Circuit type Half duplex Half duplex
Transmission type Start-stop
Protocol
MODBUS terminal
∗1
Terminal resistance
Select from with terminal resistance（120Ω）／Without terminal
resistance
：Default setting
∗1：Refer to Modicon Co. protocol specifications "PI-MBUS-300 Rev.J".
Table 3.2-2 Communication specification of MODBUS communication function
Item Specification
Standard
Select from EIA RS-485／RS-232C
Communication speed
Select from 9600bps／19200bps
Data・bit length
7bit(ASCII) / 8bit(RTU)
Stop・bit length
1bit
Data transfer direction
LSB
Parity Even parity
Letter code
ASCII character string (ASCII) / Binary data(RTU)
Node type
Slave (Controller)
Slave address set range Select from 1 to 32 address
Error check
LRC method
(ASCII) / CRC method (RTU)
：Default setting
2
3
5
RD
SD
SG
2
3
5
RD
SD
SG
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