adccommunitymod (AutomationDirect) asked a question.
A/C Frequency and DC Voltage read by PLC
Created Date: March 12,2012
Created By: wireless
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I'm a long time Automation Direct user of equipment, first time posting. I'm green on PLCs. I'm using Click or DL06 PLC. What is the easiest way to read DC voltage 24vdc or 48vdc in a PLC? What is the easiest way to read 110vac frequency IE 60hz in a PLC? Thank you.
Created Date: March 13,2012
Created by: Cap
What is the Application?..
Innovate Motorsports makes some Automotive Logging Equipment that can be Programmed to read Frequency, Duty Cycle, and Voltage, and Output it to a Proprietary Serial Bit Stream..
The Unit will convert 4 Channels of data and the Inputs are Double-ended ( Not Grounded or Common ) .. out put is serial, so you'd have to configure the Serial Port 2 on the '06..
http://tunertools.com/proddetail.asp?prod=IN-3783
Cap
Created Date: March 13,2012
Created by: wireless
The application is tower cell site monitoring.
The A/C frequency monitoring is for grid and diesel generator.
The DC voltage monitoring is for both DC power supply and batteries.
Created Date: March 13,2012
Created by: Cap
I do not know about the Requirements for Cell Sites..
I'd try to NOT do the Freq Measurements of the Grid/Generator set up..
I'd like to do a voltage Divider on the 48 Volts, and get that into the ~8 volt DC range, then dump that into an Analog to digital Input of an '06..
Then take the Grid Power, Transformer Isolate it down to the 12 volt range AC, then convert to DC, Smooth it with a large Cap, then Voltage Divide it into the ~8 Volt range also.. Put this Output to a Different Channel of the A/D Card.. do the Same for the Generator Output.. input to channel 3 of the Card..
The Outputs would be seen as 8 Volts on the 0 to 10 Volt A/D Card.. then if the Scaling is Proper, when you have 8 Volts Rerading, then the 48 Volts is On the Money, the Grid Power is at Voltage, and IF you have the 8 Volts coming from the Generator, then it is Running and AT proper Voltage..
Some other inputs of the PLC could be used to show Grid Power On.. Generator Running .. Diesel Fuel Low.. ETC..
How are you going to Monitor this Stuff.. E-Net?.. Serial Radio Modem?..
Cap
Created Date: March 14,2012
Created by: wireless
Modbus with E100 ethernet card.
Labview in our NOC. Network Operations Center.
Good info on options. Thanks.
Created Date: March 12,2012
Created by: wireless
I'm a long time Automation Direct user of equipment, first time posting. I'm green on PLCs.
I'm using Click or DL06 PLC.
What is the easiest way to read DC voltage 24vdc or 48vdc in a PLC?
What is the easiest way to read 110vac frequency IE 60hz in a PLC?
Thank you.