Micromod RetroPAK: SLC Configuration Manual User Manual
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Command Series Migration to MOD 30ML
Function Codes – Gallery Tutorial
M/A Station – Function Code 21
Analog output AO – Function Code 29
Typical Loop
Configuration in
CLC 03/04
In the case of SLC or CLC, the display faceplate operator interface functionality is
automatic and does not need any user configuration. The operator interface provides
display of the process variable, Setpoint, control output, control mode and tuning
parameters and access to change parameters such as Setpoint, control output, mode and
tuning parameters.
The MOD 30ML requires configuration for each function. There is a function block for
each function. You will need to add the required function blocks to the instrument
database. For example, if you need operator interface for the PID control you need to add
a DISP (display) block and for tuning you need to add the TL (tuning list) function block.
To perform a simple PID control loop that involves a 4-20 mA input, PID and a 4-20 mA
output in MOD 30ML, you need the following function blocks:
AIN (built-in analog input) block – There are 2 AIN blocks available. This block reads the
analog input and has some basic linearization capabilities.
VCI (Voltage or current input function) block – This block is capable of signal
conditioning, engineering unit range conversion and linearization.
PID block – This block generates the Setpoint, deviation, performs PID control and
Setpoint and output selection etc.
AOUT (built-in current output) block – There are 2 AOUT blocks available. This block is
capable of converting the PID output to 4-20 mA
DISP (display) block – This block provides the operator interface for the control
TL (tuning list) block – to configure the tuning parameters and provide operator interface
for them.
The PID block in the MOD 30ML combines PID control and M/A station. This is in
contrast to the SLC/CLC database where you would need both PID function code and an
M/A function code.
7. Add a loop compound. We will configure our control loop within this loop compound.
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