Alarm Output Function - Mitsubishi QD60P8-G User Manual

5 DETAILS AND SETTING OF FUNCTIONS

5.8 Alarm Output Function

Item
Alarm output selection
Alarm output setting value
upper/upper limit
Alarm output setting value
upper/lower limit
Alarm output setting value
lower/upper limit
Alarm output setting value
lower/lower limit
Item
Sampling pulse number
Alarm output flag
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With "alarm output function valid" set in the "alarm output selection" of the
buffer memory, the alarm output function outputs an alarm if the "sampling
pulse number" of the buffer memory exceeds the upper/upper limit value or
lower/lower limit value. The alarm is turned OFF if the sampling pulse number
is below the upper/lower limit value or above the lower/upper limit value after
the output of the alarm.
To set the alarm output function, set four points: upper/upper limit value,
upper/lower limit value, lower/upper limit value and lower/lower limit value.
The buffer memory addresses related to the setting of the alarm output
function are as follows.
Setting value
0: Alarm output function
invalid
1: Alarm output function
valid
0 to 32767
If the setting value is other than in the above values or does not establish the following
relation expression, an alarm output setting range outside error (error code: 500)
occurs.
Upper/upper limit upper/lower limit
To clear the error, turn ON the error reset request (Y8 to YF) of the corresponding
channel.
After this, set a correct value (value that will establish the above relation expression
and is within the setting range), and then turn ON the operating condition setting
request flag (Y1).
The buffer memory addresses related to the alarm output are as follows.
Read value
0 to 32767
bit0: Lower limit alarm
bit8: Upper limit alarm
[Bit pattern of alarm output]
b15 b8
Not used Not used
CH1 CH2
17 49
19 51
20 52
21 53
22 54
lower/upper limit
CH1 CH2
0 32
18 50
b4 b0
Storage Item Meaning
Lower limit alarm
0:OFF(Normal)
1:ON(Range over)
Upper limit alarm
Buffer memory address
CH3 CH4 CH5 CH6
81 113 145 177
83 115 147 179
84 116 148 180
85 117 149 181
86 118 150 182
lower/lower limit
Buffer memory address
CH3 CH4 CH5 CH6
64 96 128 160
82 114 146 178
MELSEC-Q
CH7 CH8
209 241
211 243
212 244
213 245
214 246
CH7 CH8
192 224
210 242
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