from the RS-485 department...Modbus ASCII RS-485
How many slave devices cab be multidroped on RS-485 bus?
By Ramu on 29 July, 2009 - 7:44 am -
Hi, For RS485, its 1 + 31. Ramu...
from the Forum department...Broadcast on Modbus TCP
How do I handle Modbus broadcast requests on TCP when I convert it from a serial bus?
Modbus/TCP uses TCP/IP to deliver the messages. Therefore, broadcast is a TCP/IP feature, not a...
By Fred Loveless on 28 July, 2009 - 10:00 am -
TCP is a a connected state. In order to communicate to a Device that is using TCP you have to...
from the Forum department...Register mapping of variable length data
How to map variable length data to holding registers?
It's always good to hear feedback. The feedback helps other people who are following the discussion...
Now, that took me some time! But I have defined the registers (and am very glad that's finally...
I will start off by saying that what would probably help a lot is to sit down and imagine yourself...
By Sebastian Seidel on 18 July, 2009 - 4:41 pm -
Thank you very much for the swift and in-depth response, without which I would most certainly have...
You said that you're not sure about "the max data length of many variables". They're 32...
from the Forum department...ABB DCS w/ AC450 and MP200/1 interface w/ other DCS systems
Hi, I wanna interface an ABB dcs system including AC450 and MP200/1 with another type of DCS systems
By bob on 26 July, 2009 - 1:32 pm -
With over 500 unix OS500s in inventory..... When it comes to masterpiece and ac450 controllers, we...
from the Forum department...Mark V - missing IO card
Mark V - DCC errors, missing IO card
Good bit of troubleshooting finding that by re-booting the TCDAs (which is what it's believed you...
from the Electronics department...Microcontroller serial communication
how does 8051 microcontroller do serial communication
By Anil on 24 July, 2009 - 9:19 am -
Hi, There are basically 2 registers in the SFR map called SCON & SBUF. What ever u write to...
from the Software department...SINEC H1 to Ethernet (RJ45)
Converting SINEC H1 Cable connection and to Ethernet.
By Tony R. Gunderman on 24 July, 2009 - 8:52 am -
Depending on where you want to do the conversion, an AUI to Ethernet 10-BaseT transceiver may be...
from the Forum department...Digi One IAP Communication
Communication DigiOne IAP with Flexlogix and PC.
By Jeremy Pollard on 23 July, 2009 - 9:32 pm -
The device should have come with a CD. if not you can download the config software from digi.com ...
from the forum department...Read weight from an rs232 scale
Problem reading weight using an rs232 serial port on a pc using VS2005 C#.
from the Engineering department...Modbus Connection AB CompactLogix - Mitsubishi A2ACPUcomm
Modbus Connection AB CompactLogix - Mitsubishi A2ACPUcomm
By James on 23 July, 2009 - 9:28 am -
Yes, we want to use compactlogix as a master then Mitsubishi A2ACPU as a slave. Do you mean that we...
from the Forum department...DF1 Driver for Linux
I am looking for a DF1 driver for Linux
Try the following: http://sourceforge.net/projects/libpccc/ It's source, so the processor...
from the LED display board department...LED display board
Temperature Display variation
By carol on 22 July, 2009 - 9:52 am -
yes,check the controller. http://www.ledtop168.com maybe there some engineer can help....
from the Engr department...Modbus 2 Bacnet Convertor
I need Modbus converters
By Yogesh Deshmukh on 22 July, 2009 - 7:33 am -
Aftek have come up with BM series protocol converters to bridge the gap between devices which...
from the System Engineering department...Modbus RTU via TCP
Is it possible to convert Modbus via TCP into Modbus TCP?
Hello, I know a device which is exactly designed for your requirement, so from-to Modbus RTU...
from the Forum department...Modbus RTU Master in Program Master mode
Need a Modbus RTU Master OPC Server as "Program Master"
Do you have the info how to setup those "Progam Master" paths on MB Plus? Sounds to me...
"Program Master" and "Data Master" are Modbus-Plus terms. Modbus-Plus supports...
from the Forum department...Protocol Converter from MODBUS RTU to proprietary protocol on TCPIP
Protocol Converter from MODBUS RTU to proprietary protocol(HAI Omni-Link II protocol) on TCPIP
from the Automation List department...Problems setting up FMS comm. with CIF50
New CIF50 isn't able to set up a succesful link with the PLC.
By erich on 20 July, 2009 - 2:53 am -
Did you or someone els solved this problem? I have the same issue. Thanks Eric...
from the Forum department...Moxa Configuration
Configuring moxa unit uc7420 with that of a areva m243 using dnp3 protocol
from the Forum department...communication with slc 5/4
no communication between my pc and slc 5/4
from the Forum department...1747-cp3 pinout diagram
Allen Bradley RS-232 (1747-cp3)pinout diagram needed
from the Instrumentation Kiddie department...Single DP Xtr for 10:1 Turndown?
In era of modern DP smart transmitters do we still need 2 transmitters for 10:1 turndown?
By Roy Matson on 17 July, 2009 - 10:17 pm -
I would say yes provided you are reading the DP from the transmitter with HART of Fieldbus so that...
from the Current DH+ interface info. department...Programming & Diagnostics to DH+ from newer PC
Talking to DH+ with a modern computer and old DOS software
By James Ingraham on 17 July, 2009 - 11:01 am -
1) I believe you mean ISA, not ide. 2)There is not going to be a solution for $500. List price...
Check out the DataLink Ethernet/IP Gateway to DH+ Solution. Although it costs $1,500 (more than...
from the Forum department...Satchwell Sigma Interrogation
In need of a software (or hardware) solution to read data out of a Sigma system on demand.
So far as I can tell, there are just two ways. They sell some integration boxes which have...
By Rav Panchalingam on 16 July, 2009 - 12:13 am -
Hi thanks, I may need to clarify my question. I don't need any help to read BACnet, in fact I've...
There are BACNET libraries on Sourceforge. I suggest that you try one of those. Since you'll have...
from the Automation List department...xbtz925 cable diagram
seeking cable diagram for xbtz925
By Evgeniy on 16 July, 2009 - 5:45 am -
Good luck(for all:)) Side 1(Panel) Side 2(TSXCUSB485) 3--------------------1--- ...
from the Automation department...DCS Shutdown signals
Shutdown logic signal between two DCS systems
Thanks Nick, Actually (I must apologize)the communication required is between two independent...
from the Communication department...Yokogawa Centum CS 3000 & 3500/92 Communication
Error in reading Analog Data from Holding registers
Parity adds a bit to check whether or not a serial word (byte) passes the test of having an even or...
1. Parity is redundant with CRC checking, so you might disable parity else you may limit full...
from the Forum department...configure SLC500 to communicate with micromotion MVD direct connect
looking for a setup guide or some app notes
By Erik on 10 July, 2009 - 5:53 pm -
What SLC500 module are you using??? The 3150-MCM module has 2 DB-9 ports ont he front of the...
from the Forum department...Wayne Dresser Current Loop protocol
Dresser Wayne Protocol for Current Loop
By deniss on 9 July, 2009 - 5:10 am -
I am need Wayne Protocol, email me please. deniss [at] bas.lv ...
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land He's trying to ignore.
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