justin lutz
Member
Good morning, All.
Equipment:
SLC 5/03
1746-NI8 Analog Input Module
1746-NO4I Analog Output Module
Flowmeter, transmits a 4-20mA signal
I have a sludge pump whose speed will be dependent upon the flow rate transmitted by the flowmeter (Increase speed to increase flow rate, decrease speed to decrease flow rate). The client wants to operate between 300-600GPM. Thus, I am looking to set up a PID for this application, however I do not have any experience in doing so. If I have it right, my PV is the flow rate, while my CV is the pump speed.
Question #1: The analog input module will scale the transducer input (4-20mA) from 0 - 16,383. Do I want to set things up such that 0 = 300GPM and 16,383 = 600GPM, or do I want 0 - 16,383 to represent the full scale of the transducer, say 0-1000GPM?
Question #2: I have attached a zip file with 3 rungs of logic in an attempt to set up a PID. The only things I have entered in the PID setup so far are SP, Smax, and Smin. According to the info. that I've provided, does this seem correct?
Any comments/advice would be greatly appreciated!
Thank you,
Justin
[font='Times New Roman','serif'] [/font]
Equipment:
SLC 5/03
1746-NI8 Analog Input Module
1746-NO4I Analog Output Module
Flowmeter, transmits a 4-20mA signal
I have a sludge pump whose speed will be dependent upon the flow rate transmitted by the flowmeter (Increase speed to increase flow rate, decrease speed to decrease flow rate). The client wants to operate between 300-600GPM. Thus, I am looking to set up a PID for this application, however I do not have any experience in doing so. If I have it right, my PV is the flow rate, while my CV is the pump speed.
Question #1: The analog input module will scale the transducer input (4-20mA) from 0 - 16,383. Do I want to set things up such that 0 = 300GPM and 16,383 = 600GPM, or do I want 0 - 16,383 to represent the full scale of the transducer, say 0-1000GPM?
Question #2: I have attached a zip file with 3 rungs of logic in an attempt to set up a PID. The only things I have entered in the PID setup so far are SP, Smax, and Smin. According to the info. that I've provided, does this seem correct?
Any comments/advice would be greatly appreciated!
Thank you,
Justin
[font='Times New Roman','serif'] [/font]