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Modbus and acyclic time
New Replies:
Some of the functionalities are located on the field, in particular the diagnostic functions. I...
By M Griffin on 16 November, 2009 - 9:16 pm -
Modbus is strictly a communications protocol. The DCS, PLC, or other controller determines how and...
I'd like to pull data from the Telemecanique Zelio Logic Relay.
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By chud on 6 November, 2009 - 1:15 am -
If you want to use modbus you must buy a modbus expansion unit to plug on the side of the zelio...
If you need a Modbus and OPCServer converter, check out the FieldServer OPCServer from...
By DanMuller on 5 November, 2009 - 8:47 am -
I would be surprised if you find a freeware server that will do the job. If the one you have is not...
Thanks Wassim for your response,
I regret to inform you that the link you posted is reported as...
Is it possible to use any RS232 to TCP converter or should I use a specific converter for Modbus?
New Replies:
By Harvard on 15 October, 2009 - 11:27 am -
I use a B&B ESP901 Single Port RS-232/422/485, as an example, and it can be used with any...
By Fred Loveless on 15 October, 2009 - 10:04 am -
Modbus over TCP is what you get when you use a straing serial to ethernet converter. This is...
RTU / TCP mapping
New Replies:
By M Griffin on 14 October, 2009 - 6:34 pm -
In a typical Modbus RTU to TCP gateway the data stays the same. It's just the wrapper around the...
By Fred Loveless on 14 October, 2009 - 2:32 pm -
Yes it will remain the same. The address structure is exactly the same....
Looking for a PC running XP or similar that contains RS-485 ports.
New Replies:
By curt wuollet on 8 October, 2009 - 1:53 pm -
Many PC104 units include ports capable of RS 485 as do some "industrial computers". You...
Free/Open Source software project MBLogic now has soft logic.
New Replies:
By M Griffin on 18 September, 2009 - 3:22 am -
Don't forget with the EZAutomation I/O that you also have to include a base. The base contains all...
Thanks for the pointers. EZAutomation does provide good prized and flexible I/O (ModBus RTU; ModBus...
Thanks for the reply. I was thinking maybe I can use a ModBus to I2C converter. Googling for such a...
By M Griffin on 16 September, 2009 - 10:32 am -
I haven't implemented any drivers for I2C or X10, as I don't have any suitable hardware to test...
Can the MBLogic software be adapted to also work with I2C (I²C) and X10? I would use it then to...
Question about how to develop a software which is communicating on modbus/TCP
New Replies:
By M Griffin on 11 September, 2009 - 5:27 pm -
In reply to JonC:
I read your blog post, and it sounded interesting. How did you do the remote...
By JonC on 11 September, 2009 - 11:55 am -
Hey all,
Don't know if anyone is still working on this. I have written a great deal of code...
By M Griffin on 6 April, 2009 - 3:51 pm -
A Modbus register is 16 bits, so 450000 isn't going to fit in one register. A common method of...
Hello,
I got the other problem. I want to send a value( 450000) to the register 23404. But read...
Master/Slaver Simulation
New Replies:
By Mark on 1 September, 2009 - 4:13 pm -
Hello,
The PeakHMI MODBUS Master/Slave Relay Ladder Logic program can perform this task.
...
By M Griffin on 1 September, 2009 - 2:57 pm -
What sort of Modbus are you looking for? RTU (RS-232/RS-485) or TCP (Ethernet)?
If you are...
Convert SIMATIC to MODBUS address
New Replies:
To poll Address 11, Reg 40001 for 2 Regs:
0B 03 00 00 00 02 C4 A1
To poll Address 12 register...
seven Flow computers 7950 over a MODBUS network
Yokogawa CS3000 communication with a MS Excel application running on PC
New Replies:
By birzz12 on 23 June, 2009 - 8:45 am -
Centum CS3000 it self have its own calculation function block...you can try to calculate by using C...
By M Griffin on 1 June, 2009 - 5:32 pm -
I think that Matrikon has a product that is meant for this. I don't know the name for it, but you...
By Andrey Romanenko on 1 June, 2009 - 4:30 pm -
Hello,
> OPC server functionality is not included in Yokogawa CS3000 package we have...
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