Preparation for Communication
INR-244-831
1-1
1
Preparation for Communication
Make preparation for using communication facility as follows.
1) Turn off the power switch of Thermo-con. (Detach the communication connector when the power
switch of the thermo-con is turning off.)
2) Connect communication cable to communication connector of Thermo-con.
･
Use twist pair shield cable as communication cable.
･
Connect the host and thermo-con with the straight cable for RS-485.
･
Connect shielded cable of communication cable to communication connector and drop it to FG(flame
ground).
･
Connection drawing for communication is shown in the Figures 1-1.
･
Length of communication cable for RS-485 shall be limited to around 500[m] in total
･
If communication cable for RS-485 is longer, connect terminating resistance (220
Ω
,1/2w) to each +
and - terminal of the host computer and the farthest Thermo-con.
3) Turn on the power switch of Thermo-con.
4) Set the communication method (page 2-1) for all Thermo-con connected. (Refer the operation
manual (HEC-OM-Y008) how to set the communication method parameters.)
5)
That’s all for preparation of communication. Then if a communication command from the host
computer is given, each Thermo-con will respond.
Figure1-1 Communication Connection
