Mitsubishi FX1N Series Programming Manual

FX Series Programmable Controllers Points Of Technique 10
10-26
10.16 Additional PID functions
The following parameter table gives the additional parameters available with FX2N(C) MPUs.
These are:
-S
3+1 bit 4: Pre-tuning operation flag.
-S
3+1 bit 5: Output Value range limit flag.
-S
3+22: Output Value upper limit.
-S
3+23: Output Value lower limit.
For the full list of other parameters refer to page 5-102.
Note: S
3+1 b2 and b5 should not be active at the same time. Only one value each is entered
into the data registers S3+22 and S3+23.
10.16.1 Output Value range control (S
3
+1 b5)
Bit5ofparameterS
3+1, when ON, activates S3+22 and S3+23 to be upper and lower limits for
the output value (MV).
This feature restricts the output value to the specified limits; in effect, this automatically
performs the same operation as that described in section 10.15.1.
Param-
eter
S
3 + P
Parameter
name/func-
tion
Description
Setting
range
S
3+1
Action-reac-
tion
direction and
alarm control
b0
Forward operation(0),
Reverse operation (1)
Not
applicable
b1 Process Value (S
2) change alarm OFF(0)/ON(1)
b2 Output Value (MV) change alarm OFF(0)/ON(1)
b3 Reserved
b4 Activate pre-tuning (auto resets on completion)
b5 Output Value (MV) range limit OFF(0)/ON(1)
b6-15 Reserved
S
3+22
Output Value,
maximum
positive
change alarm
Active
when
S
3+1, b2
is set ON.
This is an alarm for the quantity of positive change
which can occur in one PID scan. If the Output
Value (MV) exceeds this value, bit S
3+24, b2 is
set
0 to 32767
Output Value,
Upper limit
restriction
Active
when
S
3+1, b5
is set ON.
This is an upper limit for the Output Value (MV).
During operation the PID instruction restricts the
output so that it does not exceed this limit.
-32768 to
32767
S
3+23
Output Value,
maximum
negative
change alarm
Active
when
S
3+1, b2
is set ON.
This is an alarm for the quantity of negative
change which can occur in one PID scan. If the
Output Value (MV) falls below this value, bit
S
3+24, b3 is set.
0 to 32767
Output Value,
Lower limit
restriction
Active
when
S
3+1, b5
is set ON.
This is a lower limit for the Output
Value (MV).
During operation, the PID instruction restricts the
output so that it does not fall below this limit.
-32768 to
32767
FX 1S
FX 1N FX 2N
FX 2NC

Mitsubishi FX1N Series Specifications

General

Brand	Mitsubishi
Model	FX1N Series
Category	Controller
Language	English