Have you also tried the suppliers website for more information, as some of these don't look like industry accepted instrumentation terms the rest of us use.

When will a PID block comes into Tracking mode? As per my understanading if any error in Analog output parameter then it comes in tracking mode and but what value the PID block will give to the analog output variable. Any foxboro experts pls help.

During Software Configuration of Analog module , you have to check the "Fail safe" box . This Will Enable the fail safe condition / value to be sent to the field in case of Failure of Module

Dear Mr.sarvanam, In during fail safe conditions, what will be PID block output.?

All these are the different parameters of the PID block in foxboro system.

Track - It is a set point tracking option. When PID blocks goes to manual or Down stream connection is open,Set point Tracks the measurement value to avoid the bump in the process output.

Clamp - There are two types of clamping parameters available.

Set point clamping:e.g. If you want your level set point should not go below 5%, Low Set point parameter can be set at 5% due to this even if the operator wants to set the SP value to below 5%, it will not go because it is clampped at 5%.

OutPut Clamping: Same like SP Clamping option. It helps to clamp the out of PID block to particular value.

BCALCI - It is a back calculation input parameter. When the PID block goes to manual BCALCI get the input from output block. This is usefull to avoid bump in the process.

BCALCO - This a output Parameter of Analog output block. Which stores the output value. BCALCO of Output block is connetcetd BCALCI of PID Block.