azecraze
Member
Righto, I only do PLC programming on and off, and have never done any programming of analog stuff, and need a pointer in the right direction for the following scenario:
I am using a Allen-Bradley Micrologix 1200 with analog expansion module 1762-IF2OF2. This module has 2 analog inputs, and 2 analog outputs.
This is installed in a small Hydro Power Plant 150KW, and what needs to happen is that Input A0 (WaterFlowRate) needs to compare with Input A1 (OutputCurrent). The difference between them will be used as the analog output which controls an element bank water heating load dump so that maximum use is made of the water at all times.
What is the basic ladder logic required to achieve this goal and what bits am I supposed to reference?
I need to know how to implement this for both straight thru, and PID operation.
I programming using RSLogix500.
I am using a Allen-Bradley Micrologix 1200 with analog expansion module 1762-IF2OF2. This module has 2 analog inputs, and 2 analog outputs.
This is installed in a small Hydro Power Plant 150KW, and what needs to happen is that Input A0 (WaterFlowRate) needs to compare with Input A1 (OutputCurrent). The difference between them will be used as the analog output which controls an element bank water heating load dump so that maximum use is made of the water at all times.
What is the basic ladder logic required to achieve this goal and what bits am I supposed to reference?
I need to know how to implement this for both straight thru, and PID operation.
I programming using RSLogix500.