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I'm working on a simple information system displaying production rates on a line and have a number of serial devices (keypads) for user input hanging off a PC.
I'm using VB6 as the HMI with some operator input coming from the keyboard and mouse. I have 2 machines that I want to have sensors count parts going through and update the PC by sending count info to the PC based on a timer (so say every 30 seconds I send count A and Count B as a string).
I also want to be able to send a "reset counters" command back. The reason for the RS232 is just I want to do it cheaply (I already have a spare port). This plant is loaded with Allen Bradley and I do lots of DDE/OPC but I can no way justify the cost of an RsLinx package for such a simple stand alone app. A cheap I/O card would do the trick as well. Does anyone have any suggestions?
Thanx.
I'm using VB6 as the HMI with some operator input coming from the keyboard and mouse. I have 2 machines that I want to have sensors count parts going through and update the PC by sending count info to the PC based on a timer (so say every 30 seconds I send count A and Count B as a string).
I also want to be able to send a "reset counters" command back. The reason for the RS232 is just I want to do it cheaply (I already have a spare port). This plant is loaded with Allen Bradley and I do lots of DDE/OPC but I can no way justify the cost of an RsLinx package for such a simple stand alone app. A cheap I/O card would do the trick as well. Does anyone have any suggestions?
Thanx.