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Hello guys.This is Yamashita, working as electric engineer at a Japanese company, and I'm a Japanese.
First of all, I'm not good at English well, so if you cannot understand my e-mail, don't hesitate to ask me the meanings.
Now, I have a question.
We produce optical fiber in our factorys, and the processes are becoming more complicated, so it is difficult to control such processes by PLC now.
So, we decided to use PC/AT based control-systems.
But, we've never used such systems, so there is no informations of that.
Now, I want to ask:
I've heard that WinNT didn't secure about real time responses like RTOS, such as OS-9, VxWorks and QNX. It's depending on the way to use, I mean, when we use some heavy GUIs, programed by VB, the responses would be dull, but don't , really quick.
Even when the other processes are heavy, the main processes for controling can work in milli-second-units, I mean, quicker than 100 milli-second, that would be no problem.
But, I've heard that when used quite heavy processes, sometimes, the response time would up to 1 second or more, and much worse, hung up.
I don't know if we set the priority level properly, the main control process would work.
So, are there someones who use WinNT to control some productive equipment ?
And, how are your systems composed ? Only WinNT? or WinNT + some board PLCs?
And, are there any real time extension products for WinNT ?
regards
------
Yamashita Taiichiro
First of all, I'm not good at English well, so if you cannot understand my e-mail, don't hesitate to ask me the meanings.
Now, I have a question.
We produce optical fiber in our factorys, and the processes are becoming more complicated, so it is difficult to control such processes by PLC now.
So, we decided to use PC/AT based control-systems.
But, we've never used such systems, so there is no informations of that.
Now, I want to ask:
I've heard that WinNT didn't secure about real time responses like RTOS, such as OS-9, VxWorks and QNX. It's depending on the way to use, I mean, when we use some heavy GUIs, programed by VB, the responses would be dull, but don't , really quick.
Even when the other processes are heavy, the main processes for controling can work in milli-second-units, I mean, quicker than 100 milli-second, that would be no problem.
But, I've heard that when used quite heavy processes, sometimes, the response time would up to 1 second or more, and much worse, hung up.
I don't know if we set the priority level properly, the main control process would work.
So, are there someones who use WinNT to control some productive equipment ?
And, how are your systems composed ? Only WinNT? or WinNT + some board PLCs?
And, are there any real time extension products for WinNT ?
regards
------
Yamashita Taiichiro