modbus communication

gakpapa

Member
Join Date
Mar 2008
Location
jakarta
Posts
34
Hi guys,
happy new year
wis a better years for you

guys, i have two questions.
1. is there any of you ever use wireless radiolinx FHS for modbus 485 comunication?how to do that?
2. I have an MCM-3150. there are two serial port. I configured port 1 as a master, port two as a slave. Can i do a loop test on MCM-3150 by connecting those port via cross serial cable? i wanna check whether the master data will change or not if i change a data on the slave.

Thanks & regards
roe
 
Hello gakpapa;
1.-Sorry, can't help you there, maybe someone else can answer on that question;
2.-We have done exactly that with an MVI56-MCM 2-port modbus card for Controllogix platform for testing purposes. So it should work the same on the SLC platform.
But just saying "you should use a cross-cable" has no meaning, either in RS-232 or RS-485. You will have to make sure the requirements for each port are correctly accounted for if you want to do a valid test.
Hope this helps,
Daniel Chartier
 

Similar Topics

Hello, I need to access the bits from the fire system control panel through RS-485. So, I used Read Var block to read from the panel...
Replies
0
Views
47
Hi, i cant establish communication between fatek plc with an energy meter, both capable for modbus tcp, i did with modscan but fatek plc does not...
Replies
1
Views
120
Hi Guys, I am a new member and this is my first post! I have a little PLC experience but it is mostly with siemens logo and using ladder...
Replies
4
Views
840
can i send and recieve data using my yokogawa UT35A controller with my siemens s7 1200 plc using profinet communication without using gsd file
Replies
1
Views
361
CR3000 HMI ModBus TCP/IP Master has gotten erratic after increasing block size to 24 at DA70A in Protocol 1. What should a practical guide be for...
Replies
2
Views
545
Back
Top Bottom