Pid Control - Omron MX2 User Manual

"A" Group: Standard Functions
Func.
Code
a154
a155
*1
Up to 1000Hz for High frequency mode (d060 set to "2")
*2
Up to 1000Hz for High frequency mode (d060 set to "2")
3-5-7

PID Control

Func.
Code
A071
A072
A073
A074
A075
A076
A077
A078
a079
a156
a157
*1
Up to 1000Hz for High frequency mode (d060 set to "2")
"A" Function
Name
Deceleration hold frequency
Deceleration hold time
When enabled, the built-in PID loop calculates an ideal inverter output value
to cause a loop feedback process variable (PV) to move closer in value to the
set point (SP). The frequency command serves as the SP. The PID loop algo-
rithm will read the analog input for the process variable (you specify the cur-
rent or voltage input) and calculate the output.
"A" Function
Name
PID enable
PID proportional gain
PID integral time constant
PID derivative time constant
PV scale conversion
PV source
Reverse PID action
PID output limit
PID feed forward selection
PID sleep function action
threshold
PID sleep function action delay
time
Description
Sets the frequency to hold decel-
eration, range is 0.0 to 400.0Hz
Sets the duration of deceleration
hold, range is 0.0 to 60.0 seconds
Description
Enables PID function, three option
codes:
00... PID Disable
01... PID Enable
02... PID Enable with reverse out-
put
Proportional gain has a range of
0.00 to 25.00
Integral time constant has a range
of 0.0 to 3600 seconds
Derivative time constant has a
range of 0.0 to 100 seconds
Process Variable (PV), scale fac-
tor (multiplier), range of 0.01 to
99.99
Selects source of Process Vari-
able (PV), option codes: 00 [OI]
terminal (current in)
01... [O] terminal (voltage in)
02 ...ModBus network
03... Pulse train input 10 Calculate
function output
Two option codes: 00 PID input =
SP-PV 01 PID input = -(SP-PV)
Sets the limit of PID output as per-
cent of full scale,
range is 0.0 to 100.0%
Selects source of feed forward
gain, option codes:
00... Disabled
01... [O] terminal (voltage in)
02... [OI] terminal (current in)
Sets the threshold for the action,
*1
set range 0.0~400.0 Hz
Sets the delay time for the action,
set range 0.0~25.5 sec
Section 3-5
Run Defaults
Mode
EU Units
Edit
0.0 Hz
*2
0.0 sec.
Run Defaults
Mode
EU Units
Edit
00 –
1.0 –
1.0 sec
0.00 sec
1.00 –
00 –
00 –
0.0 –
00 –
0.00 Hz
0.0 sec
87