Micromod MOD: 1800P - MOD 30ML Identity Module (Version 2) PID and Ramp/Soak Functions User Manual
Page 30
Continuous Control Functions
PID CONTROL BLOCK
2-24
59
Control Algorithm Type (CATYPE) .................................................................................C – R
This line specifies the types of control actions for the controller. The valid actions and their
values are described below.
Gain (column 1):
O
0
Off. Gain response is turned off.
P
1
On Process. Gain response value is determined by process input
signal.
E
2
On Error. Gain response value is determined by error signal.
Reset (column 2):
O
0
Off. Reset response is turned off.
S
4
Standard. Reset response is turned on and is operating with
Standard Algorithm. It can be used with either externally
generated adaptive gain or reset and/or external feedback.
Manual reset must be turned off.
M
8
MICRO-SCAN. Reset response is turned on and is operating with
MICRO-SCAN algorithm. It can be used with either
externally generated adaptive gain or reset, but not with
external feedback. Manual reset must be turned off.
NOTE:
The Standard Algorithm and Microscan Algorithm have different anti-
reset windup characteristics that affect how they approach limits.
Otherwise, the two algorithms integrate the same.
Standard is necessary on applications requiring external feedback
and where better management of blips is required.
Microscan comes out of a limit one reset time constant ahead of the
setpoint/process crossover and is required on applications needing
good startup characteristics without overshooting and on
applications with large setpoint changes which also require an
approach to the new setpoint without overshooting.
Pre-Act (column 3):
O
0
Off. Pre-Act response is turned off.
P
16
On Process. Pre-Act response value is determined by process
signal.
E
32
On Error. Pre-Act response value is determined by error signal.
Manual Reset (column 4):
O
0
Off. Manual reset response is turned off.
E
64
Enabled. Manual reset response is turned on (only if reset response
is turned off).