ASCII Data from Weigh Bin Scale with Quantum Unity Pro and 140 ESI 062 010 Card Help!

[bmrinell]

Anyone have experience using Unity Pro function block MUX command words to read serial data? We are upgrading from an Allen Bradley PLC 5/40 to a Modicon Quantum Unity Pro 671 60 Processor and trying to read ASCII data from a Thermo Ramsey 10-150 with add on serial/ASCII module output card.

The data read works for awhile but then it will stop and the only way to get it to continue is to use hyperterminal and send a CTRL-R and Carriage Return back out the port to wake up the serial output to resume communications.

We are using 140 ESI 062 10 Port1 and Port2 to read 2 weigh bins.
2400 Baud, 7 data bits, ODD parity, 1 stop bit, keyboard off, XON/OFF disabled.

Anyone have any ideas or experience going from Allen Bradley PLC 5 to Modicon Quantum Unity doing serial?

Any help will be greatly appreciated. Feeling stressed.

BMR

 

[controlsdude]

most scale interfaces I have seen require two way comms, read and write. Maybe you missed something in the conversion? I would use hyperterminal to get a dump of the strings that you need back and forth from scale, then try to reproduce that in your code on the other processor. Maybe there is some ctrl character needed in the port config that is missing from PLC port config.

 

[IRstuff]

Can't you talk to the manufacturer?

TTFN
faq731-376

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