Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 309

■Engineering value conversion
This function block converts the setting value (%) from the primary loop in the CAS or CSV mode into an engineering value.
RH-RL
SV= ×Setting value (%) from primary loop + RL
100
RH: Engineering value high limit, RL: Engineering value low limit, SV: Setting value
■Inverse engineering value conversion
This function block converts the setting value (SV) of an engineering value into a setting value (SV) in percentage (%).
100
SV(%)= ×(SV-RL)
RH-RL
RH: Engineering value high limit, RL: Engineering value low limit, SV: Setting value
■Loop stop processing
When the stop alarm (SPA) of the alarm (ALM) is TRUE, this function block performs the following processing.
• Outputs (MVP) are held.
• The control mode is automatically switched to MANUAL.
■Processing operation
: Performed, : Not performed
Control mode Processing operation
MV correction

MAN, CMV, AUT

CAS, CSV
Operation error
Error code Description
(SD0)
3400H An invalid operation (such as division by zero) is performed.
3402H Input data (PVP) or tag data is a subnormal number or NaN (not a number).
3403H An overflow has occurred.
3405H Hysteresis 0 (HS0) is less than 0.
The control cycle (CT) setting is less than 0.
The execution cycle (T) setting is less than 0.
(Hysteresis 1 (HS1) + hysteresis 0 (HS0)) is less than 0.
Hysteresis 1 (HS1) is less than 0.
The value divided the control cycle (CT) by the execution cycle (T) exceeds 32767.
Three-position (on/off)
control


10.23 3 position ON/OFF Control (Disable Tracking for primary loop) (M+P_ONF3)
Engineering value Inverse engineering
conversion value conversion
 
 
10 LOOP CONTROL OPERATION
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