Mitsubishi MELSEC-Q series Programming Manual page 33

Name
Stop alarm
Output change rate limit alarm
Output open alarm
Sensor alarm
Upper upper limit alarm
Lower lower limit alarm
Upper limit alarm
Lower limit alarm
Positive direction change rate
alarm
Negative direction change rate
alarm
Deviation large alarm
Output upper limit alarm
Output lower limit alarm
(a)
(b) INH
This prohibits alarm detection for each item. In addition, the alarms prohibited by INH are not detected. (The INH
bits 0 to 11 correspond to the bits 0 to 11 of ALM.)
b15 b14
E
R
R
I
Abbreviation
Shows the loop stop status. Changes the loop mode to manual.
SPA Conducts stop alarm processing for the output value (BW) and alarm
signal.
Conducts the change rate limiter for the input data and outputs the
DMLA change rate alarm. (For the output change upper limit value/control
value).
Shows that it has changed to open status when the operation output
OOPA
signal has become disconnected, etc.
SEA Sensor error alarm
Checks the upper limit value of the process equipment upper limit, and
HHA outputs an alarm if the process value is higher than the upper limit
value.
Checks the lower limit value of the process equipment lower limit, and
LLA
outputs an alarm if the process value is lower than the lower limit value.
Checks the upper limit value of the process value, and outputs an alarm
PHA
if the process value is higher than the upper limit value.
Checks the lower limit value of the process value, and outputs an alarm
PLA
if the process value is lower than the lower limit value.
Outputs an alarm if the change rate is higher than the upward trend
DPPA
change rate range.
Outputs an alarm if the change rate is lower than the downward trend
DPNA
change rate range.
Conducts an error check and then outputs an alarm if over. In addition,
if the error check determines that the deviation is completely less than
DVLA
the warning value and the error is reduced by a set value from the
warning value then the deviation large alarm will be released.
Conducts a check using the upper/lower limiter and if the limiter results
MHA
are larger than the input upper limit value an alarm is output.
A check is conducted by an upper/lower limiter and if the limiter results
MLA
are smaller than the input lower limit value an alarm is output.
b13 b12 b11 b10 b9 b8 b7 b6
T D O S H L P
R M O E H L H
K L P I I I I
F I I
Description
b5 b4 b3 b2 b1 b0
P D D D M M
L P P V H L
I P N L I I
I I I
Trucking flag
(We ask the user not touch this.)
All alarm detection prohibited
S: Stored by the system
U: Set by the user
Flag
establishment
conditions
U
S
S
S
S
S
S
S
S
S
S
S
S
31
1
2
3
4
6
6
7
8