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Topics - Matt

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Technical support / Modbus RTU
« on: January 20, 2006, 05:05:02 AM »
I am trying to get a TM1001616+ Plc to talk to a micro motion flow meter using Modbus RTU protocal.The only programming that I set up was the, SETBAUD 3,&H63 on the first scan under custom function 1.Which should match the meter settings of( baud rate 9600,8 data bits,1 stop bit,odd parity). All I am trying to do is read values from DM holding registers.I also put values in the DM registers that I need to read from.Can anyone help me out.

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Technical support / Modbus slave communications
« on: January 18, 2006, 09:10:43 AM »
I am using a T100MD1616+ PLC as a modbus Slave to a Eurotherm 5000B Data Acquisition Unit being the Modbus Master.My Question is do I have to use the writemodbus command in my plc program to send the data or will the master automatically querry the data from the [DM] holding registers in the plc. If anyone has tried this application before I would greatly appreciate your help.

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