[FONT="]I am having trouble scaling a 1769-OF4. By &by, I do these several times a year and this is the 1st one that is giving me this issue. What I want is 4mA for 0% input and 20 mA for 100% input to PID. Card seems to be working. Obviously I am not.[/FONT]
[FONT="] [/FONT]
[FONT="]On the PID setup Scaling Screen:[/FONT]
[FONT="]PV Unscaled Max 100.0 Eng. Units Max 100.0[/FONT]
[FONT="]Unscaled Min 0.0 Eng. Units Min 0.0[/FONT]
[FONT="].[/FONT]
[FONT="]CV Max 100% No Tieback[/FONT]
[FONT="]CV Min 0%[/FONT]
[FONT="].[/FONT]
[FONT="]Software manual is checked and I am operating in Manual.[/FONT]
[FONT="].[/FONT]
[FONT="]Card Configuation: [/FONT]
[FONT="]1769-OF4 4 Channel Current/Voltage Analog Output Series A Rev 1.1[/FONT]
[FONT="] [/FONT]
[FONT="] [/FONT]
[FONT="] [/FONT]
[FONT="]4 different setups with Results:[/FONT]
[FONT="] [/FONT]
[FONT="]1st Result[/FONT]
[FONT="]Channel 0 Enable (Check)[/FONT]
[FONT="]Output Range 4mA to 20mA[/FONT]
[FONT="]Data Format= Percent Range[/FONT]
[FONT="]Limits: High 10625 Low -500 (Latch Limit Alarms not checked)[/FONT]
[FONT="] [/FONT]
[FONT="]Input to PID 0% Output from Card 4.0 mA[/FONT]
[FONT="]Input to PID 25% Output from Card 12.0 mA[/FONT]
[FONT="]Input to PID 50% Output from Card 20mA (why ???????)[/FONT]
[FONT="] [/FONT]
[FONT="]2nd Result[/FONT]
[FONT="]Channel 0 Enable (Check)[/FONT]
[FONT="]Output Range 4mA to 20mA[/FONT]
[FONT="]Data Format= Scaled for PID[/FONT]
[FONT="]Limits: High 17407 Low -819 (Latch Limit Alarms not checked)[/FONT]
[FONT="] [/FONT]
[FONT="]Input to PID 0% Output from Card 4.0 mA[/FONT]
[FONT="]Input to PID 25% Output from Card 8.88 mA[/FONT]
[FONT="]Input to PID 50% Output from Card 13.76mA [/FONT]
[FONT="]Input to PID 82.0% Output from Card 20mA (why ??????)[/FONT]
[FONT="]Input to PID >82%, no change from whatever it was reading [/FONT]
[FONT="] [/FONT]
[FONT="]3rd Result[/FONT]
[FONT="]Channel 0 Enable (Check)[/FONT]
[FONT="]Output Range 4mA to 20mA[/FONT]
[FONT="]Data Format= Engineering Units[/FONT]
[FONT="]Limits: High 21000 Low 3200 (Latch Limit Alarms not checked)[/FONT]
[FONT="] [/FONT]
[FONT="]Input to PID 0% Output from Card 3.2 mA[/FONT]
[FONT="]Input to PID 25% Output from Card 5.0 mA[/FONT]
[FONT="]Input to PID 50% Output from Card 10.0 mA [/FONT]
[FONT="]Input to PID 75.0% Output from Card 15.0mA[/FONT]
[FONT="]Input to PID 85.5% Output from Card 17.31% [/FONT]
[FONT="]Input to PID >85.5%, no change from whatever it was reading [/FONT]
[FONT="](can’t get to 20mA here)[/FONT]
[FONT="] [/FONT]
[FONT="]4th Result[/FONT]
[FONT="]1st Result[/FONT]
[FONT="]Channel 0 Enable (Check)[/FONT]
[FONT="]Output Range 4mA to 20mA[/FONT]
[FONT="]Data Format= Raw Proportional[/FONT]
[FONT="]Limits: High 32767 Low -32767 (Latch Limit Alarms not checked)[/FONT]
[FONT="] [/FONT]
[FONT="]Input to PID 0% Output from Card 12.09 mA[/FONT]
[FONT="]Input to PID 25% Output from Card 13.45 mA[/FONT]
[FONT="]Input to PID 50% Output from Card 14.81mA [/FONT]
[FONT="]Input to PID 75% Output from Card 16.16 mA[/FONT]
[FONT="]Input to PID 86.7% Output from Card 16.80 mA[/FONT]
[FONT="]Any higher results in no change, no matter what the prior reading. [/FONT]
[FONT="] [/FONT]
[FONT="]On the PID setup Scaling Screen:[/FONT]
[FONT="]PV Unscaled Max 100.0 Eng. Units Max 100.0[/FONT]
[FONT="]Unscaled Min 0.0 Eng. Units Min 0.0[/FONT]
[FONT="].[/FONT]
[FONT="]CV Max 100% No Tieback[/FONT]
[FONT="]CV Min 0%[/FONT]
[FONT="].[/FONT]
[FONT="]Software manual is checked and I am operating in Manual.[/FONT]
[FONT="].[/FONT]
[FONT="]Card Configuation: [/FONT]
[FONT="]1769-OF4 4 Channel Current/Voltage Analog Output Series A Rev 1.1[/FONT]
[FONT="] [/FONT]
[FONT="] [/FONT]
[FONT="] [/FONT]
[FONT="]4 different setups with Results:[/FONT]
[FONT="] [/FONT]
[FONT="]1st Result[/FONT]
[FONT="]Channel 0 Enable (Check)[/FONT]
[FONT="]Output Range 4mA to 20mA[/FONT]
[FONT="]Data Format= Percent Range[/FONT]
[FONT="]Limits: High 10625 Low -500 (Latch Limit Alarms not checked)[/FONT]
[FONT="] [/FONT]
[FONT="]Input to PID 0% Output from Card 4.0 mA[/FONT]
[FONT="]Input to PID 25% Output from Card 12.0 mA[/FONT]
[FONT="]Input to PID 50% Output from Card 20mA (why ???????)[/FONT]
[FONT="] [/FONT]
[FONT="]2nd Result[/FONT]
[FONT="]Channel 0 Enable (Check)[/FONT]
[FONT="]Output Range 4mA to 20mA[/FONT]
[FONT="]Data Format= Scaled for PID[/FONT]
[FONT="]Limits: High 17407 Low -819 (Latch Limit Alarms not checked)[/FONT]
[FONT="] [/FONT]
[FONT="]Input to PID 0% Output from Card 4.0 mA[/FONT]
[FONT="]Input to PID 25% Output from Card 8.88 mA[/FONT]
[FONT="]Input to PID 50% Output from Card 13.76mA [/FONT]
[FONT="]Input to PID 82.0% Output from Card 20mA (why ??????)[/FONT]
[FONT="]Input to PID >82%, no change from whatever it was reading [/FONT]
[FONT="] [/FONT]
[FONT="]3rd Result[/FONT]
[FONT="]Channel 0 Enable (Check)[/FONT]
[FONT="]Output Range 4mA to 20mA[/FONT]
[FONT="]Data Format= Engineering Units[/FONT]
[FONT="]Limits: High 21000 Low 3200 (Latch Limit Alarms not checked)[/FONT]
[FONT="] [/FONT]
[FONT="]Input to PID 0% Output from Card 3.2 mA[/FONT]
[FONT="]Input to PID 25% Output from Card 5.0 mA[/FONT]
[FONT="]Input to PID 50% Output from Card 10.0 mA [/FONT]
[FONT="]Input to PID 75.0% Output from Card 15.0mA[/FONT]
[FONT="]Input to PID 85.5% Output from Card 17.31% [/FONT]
[FONT="]Input to PID >85.5%, no change from whatever it was reading [/FONT]
[FONT="](can’t get to 20mA here)[/FONT]
[FONT="] [/FONT]
[FONT="]4th Result[/FONT]
[FONT="]1st Result[/FONT]
[FONT="]Channel 0 Enable (Check)[/FONT]
[FONT="]Output Range 4mA to 20mA[/FONT]
[FONT="]Data Format= Raw Proportional[/FONT]
[FONT="]Limits: High 32767 Low -32767 (Latch Limit Alarms not checked)[/FONT]
[FONT="] [/FONT]
[FONT="]Input to PID 0% Output from Card 12.09 mA[/FONT]
[FONT="]Input to PID 25% Output from Card 13.45 mA[/FONT]
[FONT="]Input to PID 50% Output from Card 14.81mA [/FONT]
[FONT="]Input to PID 75% Output from Card 16.16 mA[/FONT]
[FONT="]Input to PID 86.7% Output from Card 16.80 mA[/FONT]
[FONT="]Any higher results in no change, no matter what the prior reading. [/FONT]