Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 302

■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
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 The control cycle (CT) setting is less than 0.
The execution cycle (T) setting is less than 0.
Hysteresis (HS0) is less than hysteresis (HS0) in negative.
The value divided the control cycle (CT) by the execution cycle (T) exceeds 32767.
10 LOOP CONTROL OPERATION
300
10.21 2 position ON/OFF Control (Disable Tracking for primary loop) (M+P_ONF2)
Processing operation
MV correction Two-position (on/off)
control
 
 
Engineering value Inverse engineering
conversion value conversion
 
 