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Programming Examples
Forcing Button Status
The OP--406 allows you to force the state of a button from the PLC.
NOTE:
The Force Option must be selected (in OP--WINEDIT) in order to force
setpoints and ONLY applies to Alternate Action Buttons.
This funtion is used to set the state (on or off) of every alternate action pushbutton. To
use the “Force Button Status” function, set the F1 bit and all buttons that you want to
be on, leaving all other bits off. The example below shows buttons 1 and 4 being
forced on and buttons 2 and 3 being forced off when C377 is active
C377
C77
F1
C60
OUT
OUT
C63
C61
OUT
RST
C62
RST B3
B2
B4
B1
Set the F1 bit and the bits for Buttons 1 and 4. Clear
Buttons 2 and 3.
This function is used to turn individual buttons on without affecting the state of any
other buttons. To use the “Force Buttons On” function, set the F2 and all buttons that
you want to turn on. Any buttons associated with bits that are not set will be
unaffected. The following example shows buttons 2 and 3 being forced on when
C377 is active.
C377
C76
F2
C61
OUT
OUT
C63
OUT B3
B2
Set the F2 bit and the bits for Buttons 2 and 3. Buttons
1 and 4 are unaffected.
This function is used to turn individual buttons off without affecting the state of any
other buttons. To use the “Force Buttons Off” function, set the F3 and all buttons that
you want to turn on. Any buttons associated with bits that are not set will be
unaffected. The following example shows buttons 2 and 4 being cleared when C377
is active.
C377
C75
F3
C61
OUT
OUT
C63
OUT B4
B2
Set the F3 bit and the bits for Buttons 2 and 4. Buttons
1 and 3 are unaffected.
Force Button
Status
Force Button(s) On
Force Button(s) Off
