Mitsubishi Electric MELSEC iQ-R Series Programming Manual page 301

■Public variable (operation constant)
Variable Description
name
PN Reverse Action/Direct Action
SVPTN_B0 Setting Value (SV) Used
■Tag data
For details on tag data that is read or written with this tag access FB, refer to the following.
Page 527 ONF2
Processing details
■MV correction
This function block calculates a deviation (DV).
Deviation DV
(%)
+
0
-
MV 100%
Condition
Direct action (PN = 1)
Reverse action (PN = 0)
DV: Deviation (%), HSO: Hysteresis (%), MV: MV output
SV- Engineering range low limit
SV(%)=
Engineering range high limit-Engineering range low limit
SV- Engineering range low limit
SV(%)=
Engineering range high limit-Engineering range low limit
Hysteresis (%) is a percentage to (Engineering range high limit - Engineering range low limit).
■Two-position (on/off) control
This function block performs two-position (on/off) control in accordance with a manipulated value.
Condition
|MV|  50 (%)
|MV| < 50 (%)
MVB: Two-position (on/off) output, MV: MV output
• Set an integral multiple of the execution cycle (T) as a control cycle (CT).
0% 100%
×100
×100
10.21 2 position ON/OFF Control (Disable Tracking for primary loop) (M+P_ONF2)
Recommended Initial value
range
0: Reverse action 0
1: Direct action
TRUE: Not used TRUE
FALSE: Used
Hysteresis HS0 (%)
Hysteresis HS0 (%)
0% 100%
Deviation (DV)
DV (%) = PV (%) - SV (%)
DV (%) = SV (%) - PV (%)
Two-position (on/off) output (MVB)
TRUE
FALSE
10 LOOP CONTROL OPERATION
Set by Data type
User INT
User BOOL
T
299
10