Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 236

■Output conversion
This function block performs output conversion processing.
Converted output (MVN)
NMAX
NMIN
(-10(%))
Converted output (MVN)
={(NMAX-NMIN)×
NMAX: Output conversion high limit value
NMIN: Output conversion low limit
MV: Manipulated value (%)
MVN: Output conversion output value
■Disable alarm detection
This function sets whether to detect alarms (ALM) or not in the deviation check and variation rate & high/low limiter
processing.
Item
Disable alarm detection by setting tag data
Disable alarm detection by control mode selection
Disable alarm detection by loop stop processing
■Loop stop processing
When the stop alarm (SPA) of the alarm (ALM) is TRUE, this function block performs the following processing.
• Outputs (MVN) are held.
• The control mode is automatically switched to MANUAL.
• When DVLA, DMLA, MHA, or MLA of the alarm (ALM) has occurred, the DVLA, DMLA, MHA, or MLA is reset.
• No alarm is detected in the variation rate & high/low limiter processing.
■Processing operation
: Performed, : Not performed
Control Processing operation
mode
Deviation
check

MAN, CMV

AUT

CAS, CSV
*1 Tracking is performed when the tracking flag (TRK) is 1.
*2 An alarm whose corresponding bit is TRUE (Valid) in the disable alarm detection (INH) is not detected.
10 LOOP CONTROL OPERATION
234
10.9 Position Type PID Control (Enable Tracking for primary loop/Disable Tracking from secondary loop) (M+P_PIDP_T)
0(%) 100(%)
MV
}+NMIN
100
PIDP Engineering
operation value
conversion
 
 
 
Manipulated variable (MV)
(110(%))
Disable alarm detection processing
If the following bits in the disable alarm detection (INH) are TRUE, DVLA,
DMLA, MHA, or MLA of the alarm (ALM) will not be detected.
• ERRI
• DVLI
• DMLI
• MHI
• MLI
In the MAN or CMV mode, DVLA, DMLA, MHA, and MLA of the alarm (ALM)
are reset and the DVLA, DMLA, MHA, or MLA will not be detected.
Page 234 Loop stop processing
Inverse Variation
engineering rate & high/
value low limiter
conversion
 
 
 
Output Tracking
conversion
*1
 
*1
 
 
Alarm
*2

*2

*2
