Mitsubishi MELSEC-Q series Programming Manual page 147

Specified position Symbol
+26
D2
PH
+27
+28
PL
+29
+30
HH
+31
Loop tag
+32
LL
*2
+33
memory
+40
HS
+41
+42
CTIM
+43
+44
DPL
+45
Loop tag
+124
D2
past value
––
*2
memory
+127
*3
*1 The data of the item(s) where the values within the recommended range are given in the parentheses are stored by the
system. Users cannot set the data.
*2 The loop tag memory and loop tag past value memory occupy a total of 128 words. (Refer to Page 27, Section 3.3.1 for
details.)
*3 The applications of the loop tag past value memory are indicated below.
Specified position
D2
When control is to be started from the initial status, the data must be cleared with the sequence program.
*4 The change rate monitor counter rounds off the data to the nearest whole number.
(2) Execution cycle ( T)
Set the execution cycle in SD1500 and SD1501 as real numbers.
Set Data
Processing contents
(1) Engineering value reverse conversion
The following operations are performed to match the upper limit alarm value (PH), lower limit alarm value (PL), upper
upper limit alarm value (HH) and lower lower limit alarm value (LL) ranges with the input value (E1).
100
PH' (PH RL),
RH RL
100
HH' (HH RL),
RH RL
Name
Recommended range
Upper limit
alarm set RL to RH
value
Lower limit
RL to RH
alarm value
Upper upper
limit alarm RL to RH
value
Lower lower
limit alarm RL to RH
value
Upper/lower
limit alarm 0 to 999999
hysteresis
Change rate
alarm
0 to 999999 Note that
Check time
Change rate
0 to 100
alarm value
–– Used by the system as a work area.
+124 Change rate monitor counter initial preset flag
+125 Change rate monitor counter
+126
E1
n-m
+127
100
PL' (PL
RH RL
100
LL' (LL
RH RL
*1
CTIM
32767
T
Description
*4
RL)
RL)
S.PHPL
Standard
Unit Data format
value
Real
–– 100.0
number
Real
–– 0.0
number
Real
–– 100.0
number
Real
–– 0.0
number
Real
% 0.0
number
Real
s 0.0
number
Real
% 100.0
number
–– –– ––
Set
by
9
U
2
U
U
3
U
4
U
4
U
6
U
7
S
8
145