Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 1228

The variation rate alarm counter is calculated using the following expression.
CTIM
m=
©T
Set CTIM and T so that the variation rate alarm counter (m)  2.
No processing is performed when variation rate alarm counter (m) = 0.
Ex.
When variation rate alarm counter (m) = 4, operations are performed as shown below.
E1
DPL
X
n-12
X
n-m
BB3, DPPA
Ec: Execution cycle
■Output conversion processing (3)
In output conversion processing, the following operations are performed and the result is stored in output 1 (BW1)/output 2
(BW2).
Condition
E1 < 0
0E1 < SV1
E1  SV1
0E1 < SV2
E1  SV2
Operation error
Error code Description
(SD0)
3400H An invalid operation (such as division by zero) is performed.
3402H The value specified by (s1) or (d2) is a subnormal number or NaN (not a number).
3403H An overflow has occurred.
3405H Variation rate alarm check time (CTIM) < 0
The execution cycle (T) setting is less than 0.
(Variation rate alarm check time (CTIM)execution cycle (T)) > 32767
11 PROCESS CONTROL INSTRUCTIONS
1226
11.2 I/O Control Instructions
DPL
X
n-7
X
n-8
X
n-9
X
X
n-10
n-11
Ec
CTIM
DPL
X
X
n-3
X
n-4
X X
n-5 n-m
X
n-6
BW1
0
0
1


X
n
X
n-1
n-2
X
n-m
BW2
0


0
1