Upper/Lower Setting Limiter (Buffer Memory Address 55, 56, 87, 88: Un\G55, Un\G56, Un\G87, Un\G88); Program Control Run/Reset (Buffer Memory Address 57, 89: Un\G57, Un\G89) - Mitsubishi Electric MELSEC-Q Series User Manual

3 SPECIFICATIONS
3.5.28 Upper/lower setting limiter
(buffer memory address 55, 56, 87, 88: Un\G55, Un\G56, Un\G87, Un\G88)

3.5.29 Program control run/reset (buffer memory address 57, 89: Un\G57, Un\G89)

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(1) The upper and lower limits of the set value (SV) are set.
(2) Set a value within the input range specified for the input range.
Set the value so that the lower output limiter value becomes smaller than the
upper output limiter value.
Lower limit value
Input range lower limit
(3) If the setting value is incorrect, a write error occurs, Error flag (Xn2) turns on, and
the error code is stored in Error code (buffer memory address: 0).
Error code
4 A value out of the setting range is set.
The lower setting limiter value is equal to or greater than the upper setting
5
limiter value.
REMARKS
Set values equal to or greater than Lower setting limiter (buffer memory address:
56, 88) and equal to or smaller than Upper setting limiter (buffer memory address:
55, 87) in the following buffer memory areas.
• Set value (SV) setting (buffer memory address: 34, 66)
• Set value (SV) settings for segment 1 to 16 of program pattern 1 to 3
• Set value at program control start (SV_PCS) setting (buffer memory
address: 501, 757)
If the value set does not satisfy the conditions above, a write error occurs. Then
Error flag (Xn2) turns on and the error code 4 is stored to Error code (buffer
memory address: 0). Note that a setting value in the buffer memory not used for
control also must satisfy the conditions above.
(1) The program control status (RUN or RESET) is set.
• RESET : Set 0.
The program control stops. When control stops, only the
measured value judgment is performed. If the pattern end output
is being executed, the output is turned off.
• RUN : Set 1.
The program control is executed.
(2) When a mode other than the program control mode is switched to the program
control mode at "RUN" status, the program control starts immediately after the
mode is switched.
Upper limit value
SV setting range
Description
MELSEC-Q
Input range upper limit
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