Alert Set Value 1 To; (Buffer Memory Address 38 To 41, 70 To 73: Un\G38 To Un\G41, Un\G70 To Un\G73); Upper/Lower Output Limiter (Buffer Memory Address 42, 43, 74, 75: Un\G42, Un\G43, Un\G74, Un\G75) - Mitsubishi Electric MELSEC-Q Series User Manual

3 SPECIFICATIONS

3.5.15 Alert set value 1 to 4

(buffer memory address 38 to 41, 70 to 73: Un\G38 to Un\G41, Un\G70 to Un\G73)

3.5.16 Upper/lower output limiter
(buffer memory address 42, 43, 74, 75: Un\G42, Un\G43, Un\G74, Un\G75)
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(1) Set the conditions to turn alerts 1 to 4 on, before setting the alert set values.
The alert mode used in the alerts 1 to 4 is set in Alert 1 to 4 mode setting (buffer
memory address: 192 to 195, 208 to 211).
Before setting this buffer memory address value, refer to Section 3.2.10.
1) Input alert (upper limit input alert, lower limit input alert)
Alert set value • • • measured value (PV)
2) Deviation alert (upper limit deviation alert, lower limit deviation alert)
Alert set value • • • deviation [measured value (PV) - set value (SV)]
3) Deviation alert (upper/lower limit deviation alert, within-range alert)
Alert set value • • • absolute value of deviation [measured value (PV)
- set value (SV)]
*1: A value less than 0 cannot be set to the alert set value 1 to 4.
(2) Set the alert set value 1 to 4 for the following buffer memory.
Channel No.
1
2
Set the value within the digital value corresponding to the input sensor used,
referring to Section 3.1.1 (1).
(3) If a value out of the setting range is set or a value other than 0 is set when the
alert is set to be unused (Alert mode setting: 0), a write error occurs. Then Error
flag (Xn2) turns on and the error code 4 is stored to Error code (buffer memory
address: 0).
(1) The upper and lower limits of the manipulated value (MV) that is actually output
to an external device is set.
(2) The setting range is -50 to 1050 (-5.0% to 105.0%).
Set the values so that the lower output limiter value becomes less than the upper
output limiter value.
(3) When output is off (PID control stop), the current value output from the Q62HLC
depends on the lower output limiter value.
Setting value
1 to upper output limiter value
-50 to 0
-32768 to -51
*1
Buffer memory address (decimal)
Alert 1 Alert 2
38 39
70 71
3.2 to 4mA (depending on setting value)
MELSEC-Q
Alert 3 Alert 4
40 41
72 73
Current value
4mA
Near 0mA
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