HRX-OM-Y120
Chapter 3 Serial communication
3.3
Communication specification
HRL Series
3-2
[Tips]
・
1 master : 1 product, or 1 master: N products.
In the latter case, up to 31 products can be connected.
・
Both ends of the communication connection (the end nodes) need to
be connected to the higher level computer.
Fig
3-2
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
None
･
:
Default setting
1
：
Refer to Modicon Co. protocol specifications "PI-MBUS-300 Rev.J".
2
3
5
R D
S D
S G
2
3
5
R D
S D
S G
Master
This product
Do not connect any wire to other PIN numbers.
Controller
